A metal corrosion rapid screening device and method

Abstract

This invention relates to a rapid screening device and method for metal corrosivity. The device includes a central control mechanism, a first detection mechanism, and a second detection mechanism. The first detection mechanism includes a first detection component configured to convert the hydrogen ion concentration in the sample into an electrical signal to obtain hydrogen ion concentration data. The second detection mechanism includes a second detection component configured to obtain the spectra of each component in the sample to obtain composition data and percentage data of each component. The central control mechanism is configured to assess the metal corrosivity of the sample based on the hydrogen ion concentration data, composition data, and / or percentage data. This device and method can rapidly and accurately assess the metal corrosivity of a sample, is not limited by the physical state of the sample, requires a small sample volume, is independent of laboratory conditions, and can effectively meet the real-time identification needs of customs, law enforcement, and other on-site operations.

Description

Technical Field

[0001] This invention relates to the field of rapid corrosive screening technology, and specifically to a rapid screening device and method for metal corrosion. Background Technology

[0002] The widespread use of chemicals has greatly improved people's living standards and brought immense convenience to society. However, the inherent hazardous properties of chemicals cannot be ignored. The Globally Harmonized Classification and Labelling System (GHS) clearly defines the hazard classification of chemicals. Among them, metal corrosivity refers to the property of a substance or mixture to significantly damage or destroy metals through chemical action. Since all industries rely on metal equipment and components, the metal corrosivity of chemicals can not only lead to equipment damage and shortened lifespan, but also adversely affect production and product quality, and even threaten environmental and human safety. Therefore, the importance of identifying chemicals with metal corrosivity is self-evident.

[0003] Currently, the identification of the metallic corrosivity of chemicals typically uses Test C1 from the UN's Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria. This test is used to determine the corrosivity of liquids and solids that may become liquid during transport. The test requires at least 1.5 L of sample and is conducted on a metal plate at a constant temperature of 55 ± 1 °C for 7 days (168 ± 1 hours). The corrosion rate is then calculated by weighing the metal plate before and after the test to assess the sample's metallic corrosivity. This test is limited to liquid samples, is highly dependent on laboratory equipment and environment, and is extremely time-consuming and consumes large quantities of sample. Furthermore, this test is not suitable for testing expensive or rare samples and cannot meet the real-time identification needs of customs, law enforcement, and other on-site operations. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the present invention provides a rapid screening device and method for metal corrosion, which can quickly and accurately assess the metal corrosion of the sample to be tested, without being limited by the physical state of the sample to be tested.

[0005] First aspect of the present invention: Provides a rapid screening device for metal corrosion, comprising,

[0006] Central control mechanism;

[0007] A first detection mechanism, electrically connected to the central control mechanism, includes a first detection component configured to convert the hydrogen ion concentration in the sample into an electrical signal to obtain hydrogen ion concentration data; and

[0008] The second detection mechanism is electrically connected to the central control mechanism. The second detection mechanism includes a second detection component, which is configured to obtain the spectra of each component in the sample to be tested, so as to obtain the composition data and proportion data of each component.

[0009] The central control mechanism is configured to assess the metal corrosivity of the sample under test based on the hydrogen ion concentration data, the composition data, and / or the proportion data.

[0010] Furthermore, the first detection component includes a housing, an inner shell disposed within the housing, and a first probe connecting the housing and the inner shell. A first electrode is disposed between the inner shell and the housing, and a second electrode is disposed inside the inner shell. The first electrode and the second electrode form a galvanic cell with the sample to be tested when the first probe is immersed in the sample to be tested.

[0011] Furthermore, the first cavity between the outer shell and the inner shell is filled with a reference gel or solution, and a first sealing element is provided at the lower end of the outer shell. The first sealing element is configured to act as a salt bridge connecting the first cavity and the sample to be tested when the first probe is immersed in the sample to be tested.

[0012] Furthermore, the first probe includes a housing, a third sealing element disposed at an opening in the housing, and a connecting tube disposed on the third sealing element. The connecting tube is configured to be inserted into the second sealing element at the lower end of the inner housing when the first probe is connected to the inner housing, so that the second cavity inside the inner housing communicates with the interior of the housing.

[0013] Furthermore, the second and third sealing members are provided with a plurality of protrusions, which are configured to increase the friction between the second sealing member and the inner shell, and between the third sealing member and the outer shell.

[0014] Furthermore, protrusions are also provided on the inner wall of the inner shell and the inner wall at the opening of the outer shell. The protrusions on the third sealing member are configured to form a ratchet engagement with the protrusions on the inner shell and the outer shell.

[0015] Furthermore, the second detection component includes a first optical fiber and a second probe connected to the first optical fiber. The second probe is provided with a plurality of reflective sheets, which are configured to reflect the excitation laser passing through the first optical fiber multiple times, so that the excitation laser is emitted from the center of the output end of the second probe, thereby irradiating the sample to be tested.

[0016] Furthermore, the output end of the second probe is also provided with a light-collecting lens, which is configured to allow the light scattered by the sample under test after being irradiated by the excitation laser to enter the second probe.

[0017] Furthermore, the second probe is also equipped with a light-collecting mirror and a second dichroic mirror. The light scattered by the sample under test enters the second probe and is focused by the light-collecting mirror, and then reflected or refracted by the second dichroic mirror so that it can enter the second optical fiber or the third optical fiber.

[0018] Furthermore, the wavelength of the light entering the second optical fiber is shorter than the wavelength of the light entering the third optical fiber.

[0019] A second aspect of the present invention provides a rapid screening method for metal corrosion, used in the apparatus described in any of the preceding claims, comprising the following steps:

[0020] Step S1: Based on the physical state of the sample to be tested, obtain the hydrogen ion concentration data of the sample to be tested, and / or the composition data of each component of the sample to be tested, and the corresponding proportion data.

[0021] Step S2: Based on the component data and the corresponding proportion data, obtain the corrosion equivalent concentration or corrosion equivalent value of the sample to be tested.

[0022] Step S3: Based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, determine whether the sample to be tested has metallic corrosiveness.

[0023] Furthermore, in step S2, the corrosion equivalent concentration is calculated using the following formula:

[0024]

[0025] Where Q is the corrosion equivalent concentration, which is dimensionless; R n w is the corrosion coefficient of the nth component, dimensionless; n This represents the percentage of the nth component, dimensionless; n is an integer greater than or equal to 1.

[0026] Furthermore, in step S2, the corrosion equivalent value is calculated using the following formula:

[0027]

[0028] Where q is the corrosion equivalent value, which is dimensionless; R n w is the corrosion coefficient of the nth component, dimensionless; n The percentage data for the nth component is dimensionless; L nLet n be the concentration limit of the nth component, dimensionless; n is an integer greater than or equal to 1.

[0029] The beneficial effects of this invention are as follows: This invention provides a rapid screening device and method for metal corrosion. The device includes a central control mechanism, a first detection mechanism electrically connected to the central control mechanism, and a second detection mechanism electrically connected to the central control mechanism. The first detection mechanism includes a first detection component configured to convert the hydrogen ion concentration in the sample to be tested into an electrical signal to obtain hydrogen ion concentration data. The second detection mechanism includes a second detection component configured to obtain the spectra of each component in the sample to be tested, to obtain the composition data and proportion data of each component. The central control mechanism is configured to evaluate the metal corrosivity of the sample to be tested based on the hydrogen ion concentration data, the composition data, and / or the proportion data. This device and method can quickly and accurately evaluate the metal corrosivity of a sample to be tested, is not limited by the physical state of the sample, requires a small amount of sample, is not dependent on laboratory conditions, and can effectively meet the real-time identification needs of customs, law enforcement, and other on-site operations. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 The diagram shows a structural schematic of a rapid screening device for metal corrosion.

[0032] Figure 2 As shown Figure 1 A schematic diagram of the structure of the first detection component of the device shown.

[0033] Figure 3 As shown Figure 2 The diagram shows the structure of the first probe of the first detection component placed in the storage container.

[0034] Figure 4 As shown Figure 2 The diagram shows a partial structural schematic of the first detection component.

[0035] Figure 5 As shown Figure 4 A magnified view of the first detection component shown.

[0036] Figure 6 As shown Figure 2 The flowchart shown is for replacing the first probe in the first detection component.

[0037] Figure 7 As shown Figure 1 A schematic diagram of the structure of the second detection component of the device shown.

[0038] Figure 8 As shown Figure 7 The optical path diagram of the excitation laser emitted by the second detection component is shown (arrows in the figure represent light rays).

[0039] Figure 9 As shown Figure 7 The second detection component shown in the diagram collects the scattered light rays (arrows in the diagram represent light rays).

[0040] In the figures, the following labels are used: 1. Device; 2. Central control mechanism;

[0041] 3. First testing mechanism; 30. First testing component; 31. Outer shell; 311. First cavity; 312. Replenishment port; 313. First sealing element; 314. First electrode; 315. Push rod; 32. Inner shell; 321. Second cavity; 322. Second electrode; 323. Plug; 324. Second sealing element; 33. First probe; 331. Shell; 332. Third sealing element; 333. Connecting pipe; 334. Connector; 335. Protrusion; 336. Protective film; 337. Supporting element; 34. Storage container; 341. Support structure; 342. Support element;

[0042] 4. Second testing mechanism; 40. Second testing component; 41. First optical fiber; 42. Second probe; 421. Reflector; 422. First dichroic mirror; 423. Light-collecting lens; 424. Light-collecting lens; 425. Second dichroic mirror; 43. Second optical fiber; 44. Third optical fiber. Detailed Implementation

[0043] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic structure of the invention, and therefore only shows the components relevant to the invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] refer to Figure 1 , Figure 2 and Figure 7As shown, the rapid metal corrosion screening device 1 provided by the present invention includes a central control mechanism 2, a first detection mechanism 3 and a second detection mechanism 4 electrically connected to the central control mechanism 2. The first detection mechanism 3 obtains the hydrogen ion concentration in the sample to be tested through a first detection component 30. The second detection mechanism 4 obtains the spectra of each component in the sample to be tested through a second detection component 40, and performs qualitative and quantitative analysis based on the spectra to obtain the composition and proportion of each component in the sample to be tested. The calculation unit of the central control mechanism 2 calculates and analyzes the hydrogen ion concentration data, as well as the composition and proportion data of each component in the sample to be tested, according to a preset algorithm and program, in order to evaluate the metal corrosivity of the sample to be tested.

[0045] In some embodiments, the rapid metal corrosion screening device 1 further includes an environmental signal acquisition mechanism electrically connected to the central control unit 2. The environmental signal acquisition mechanism is configured to detect or monitor environmental factors such as humidity, temperature, magnetic field, pressure, and salinity that affect the first detection unit 3 and the second detection unit 4. The environmental signal acquisition mechanism sends the detected or monitored results to the computing unit of the central control unit 2 to correct the detection results of the first detection unit 3 and the second detection unit 4, thereby improving the accuracy of the detection.

[0046] refer to Figure 2 As shown, the first detection component 30 includes a housing 31, an inner housing 32 disposed within the housing 31, and a first probe 33 connected to both the inner housing 32 and the housing 31. The housing 31 and the inner housing 32 together define a first cavity 311 for filling with a reference gel or solution. A replenishment port 312 is provided on the housing 31 for replenishing the first cavity 311 with the reference gel or solution. In this embodiment, the reference gel or solution can be potassium chloride gel or potassium chloride solution. A first sealing element 313 is provided at the lower end of the housing 31 to prevent leakage of the reference gel or solution from the first cavity 311. The first sealing element 313 is made of agar containing saturated potassium chloride or potassium nitrate, so that it acts as a salt bridge connecting the first cavity 311 and the sample to be tested when the first probe 33 is immersed in the liquid test solution.

[0047] A first electrode 314 is also disposed inside the first cavity 311. The first electrode 314 is inserted into the reference gel or immersed in the reference solution. The electrode material of the first electrode 314 is Ag / AgCl.

[0048] The inner shell 32 has a second cavity 321 that connects to the first probe 33, and is filled with an HCl solution. Preferably, the concentration of HCl is 0.1 mol / L. A second electrode 322 is disposed inside the second cavity 321, and the electrode material of the second electrode 322 is also Ag / AgCl. When the first probe 33 is immersed in the liquid sample, the first electrode 314, the second electrode 322, and the liquid sample together form a galvanic cell. The concentration of hydrogen ions in the liquid sample can then be obtained based on potentiometric analysis. Potentiometric analysis is well known to those skilled in the art and will not be elaborated upon further in this application.

[0049] The upper end of the inner shell 32 is provided with a plug 323 for connecting to the outer shell 31. A wire (not shown in the figure) is arranged inside the plug 323 for connecting the first electrode 314 and the second electrode 322 to the circuit of the central control mechanism 2, so that when the first probe 33 is immersed in the liquid sample to be tested, the electromotive force between the first electrode 314 and the second electrode 322 can be obtained, thereby obtaining the concentration of hydrogen ions in the liquid sample to be tested. It should be noted that obtaining the concentration of hydrogen ions through the electromotive force is well known to those skilled in the art, and will not be elaborated further in this application.

[0050] Combination Figure 4 As shown, a second sealing element 324 is provided at the lower end of the inner shell 32 to prevent leakage of HCl solution in the second cavity 321. The second sealing element 324 can be a plug made of materials such as silicone, wood, rubber, or resin. When it is necessary to replace or add liquid to the solution in the second cavity 321, the operation can be performed after removing the second sealing element 324, or it can be performed using a syringe.

[0051] refer to Figure 3-6 As shown, the first probe 33 can be detachably connected to the lower end of the inner shell 32 for replacement after measuring the liquid sample. The first probe 33 includes a shell 331, a third sealing element 332 disposed at the opening of the shell 331, and a connecting tube 333 disposed on the third sealing element 332. The shell 331 is filled with an HCl solution of the same concentration as that in the second cavity 321. The shell 331 is made of an ion-exchange membrane material, which allows ion exchange between the interior of the shell 331 and the sample when the first probe 33 is immersed in the liquid sample.

[0052] The third sealing element 332 can prevent the HCl solution in the housing 331 from leaking. During the process of connecting the first probe 33 to the inner housing 32, the connecting tube 333 on the third sealing element 332 can pass through the second sealing element 324, so that the second cavity 321 is connected to the inside of the housing 331, so that chloride ions and hydrogen ions in the HCl solution can flow freely inside the second cavity 321 and the housing 331.

[0053] A connector 334, identical to the first sealing member 313, is also provided on the housing 331. The connector 334 can contact the first sealing member 313 when the first probe 33 and the inner housing 32 are connected, so as to replenish anions and cations to the first cavity 311 and the liquid sample when the first probe 33 is immersed in the liquid sample, thereby reducing the liquid junction potential between the reference gel or solution and the liquid sample and improving the detection accuracy of hydrogen ion concentration in the sample.

[0054] refer to Figure 5 As shown, in order to ensure the firmness of the installation of the second sealing member 324 and the third sealing member 332, the circumferential sidewalls of the second sealing member 324 and the third sealing member 332 are provided with a number of protrusions 335 that protrude outward in the radial direction, so as to increase the friction between the second sealing member 324 and the inner shell 32, and between the third sealing member 332 and the shell 331.

[0055] Preferably, the inner wall at the lower end of the inner shell 32 and the inner wall at the opening of the shell 331 are also provided with corresponding protrusions 335, so as to further increase the friction between the second sealing member 324 and the inner shell 32, and between the third sealing member 332 and the shell 331.

[0056] More preferably, the protrusions 335 on the inner wall of the inner shell 32 can form a ratchet engagement with the protrusions 335 on the circumferential side wall of the second sealing member 324, so as to prevent the second sealing member 324 from falling off after it is installed at the lower end of the inner shell 32, thereby improving the installation firmness of the second sealing member 324.

[0057] More preferably, the protrusion 335 on the inner wall of the opening of the housing 331 can form a ratchet engagement with the protrusion 335 on the circumferential side wall of the third sealing member 332, so as to prevent the third sealing member 332 from falling off after it is installed at the opening of the housing 331.

[0058] More preferably, the third sealing member 332 extends to the lower end of the inner shell 32 after the connecting tube 333 is fully inserted into the second sealing member 324, so that the protrusion 335 on the circumferential sidewall of the third sealing member 332 can engage with the protrusion 335 on the inner wall of the inner shell 32, thereby increasing the connection strength between the first probe 33 and the inner shell 32. This can effectively prevent the first probe 33 from falling off the inner shell 32 when it is immersed in the liquid sample to be tested.

[0059] More preferably, when the first probe 33 and the inner shell 32 are connected, the protrusion 335 of the upper half of the third sealing member 332 can form a ratchet engagement with the protrusion 335 on the inner wall of the inner shell 32, while the protrusion 335 of the lower half of the third sealing member 332 can form a ratchet engagement with the protrusion 335 on the inner wall at the opening of the shell 331. This can further increase the connection strength between the first probe 33 and the inner shell 32.

[0060] refer to Figure 3 As shown, the first probe 33 is generally placed in the storage container 34 before use. The storage container 34 is filled with an HCl solution of the same concentration as the inside of the housing 331 to ensure that the first probe 33 is in a stable liquid environment before use. The bottom of the storage container 34 is provided with a support structure 341 for supporting the first probe 33 to prevent the first probe 33 from contacting the inner wall of the storage container 34 during storage or transportation.

[0061] Preferably, a protective film 336 is also provided on the first probe 33 to cover the connecting pipe 333 when the first probe 33 is placed in the storage container 34, so as to ensure the independence of the internal environment of the housing 331.

[0062] Preferably, a support member 342 is also provided on the inner wall of the storage container 34. The support member 342 can engage with the abutment member 337 provided on the first probe 33, thereby improving the stability of the first probe 33 placed in the storage container 34 together with the support structure 341. The abutment member 337 can also abut against the push rod 315 provided on the outer shell 31, so that the first probe 33 can be disengaged from the lower end of the inner shell 32 under the action of the push rod 315. Specifically, the push rod 315 can be slidably connected to the outer wall of the outer shell 31 through a groove or slide rail, so that the push rod 315 can move downward relative to the outer shell 31 to abut against the abutment member 337 of the first probe 33.

[0063] refer to Figure 6 As shown, the process of replacing the first probe 33 is as follows: The technician moves the push rod 315 downwards relative to the outer casing 31, causing the lower end of the push rod 315 to abut against the abutment 337 of the first probe 33. The technician continues to apply a downward force to the abutment 337 of the first probe 33 through the push rod 315 to overcome the friction between the third sealing member 332 and the inner casing 32, as well as the friction between the connecting tube 333 and the second sealing member 324, thereby separating the first probe 33 from the lower end of the inner casing 32. A storage container 34 containing the unused first probe 33 is then removed. After opening the lid of the storage container 34, the protective film 336 on the unused first probe 33 is removed. Finally, after inserting the connecting tube 333 of the unused first probe 33 through the second sealing member 324 at the lower end of the inner casing 32, the storage container 34 is removed.

[0064] refer to Figure 7 As shown, the second detection component 40 includes a laser emitter (not shown), a first optical fiber 41 connected to the laser emitter, a second probe 42 connected to the first optical fiber 41, and a second optical fiber 43 and a third optical fiber 44 connected to the second probe 42. The excitation light emitted by the laser emitter reaches the second probe 42 via the first optical fiber 41, and the second probe 42 irradiates the sample to be tested with the excitation light. After the light scattered by the sample to be tested enters the second probe 42 and is reflected and refracted, it reaches the analysis module of the second detection mechanism 4 via the second optical fiber 43 and the third optical fiber 44. The analysis module performs qualitative and quantitative analysis on the absorption or emission spectra of each component in the sample to be tested as the molecules change from one energy state to another, thereby obtaining the composition and corresponding proportion of each component in the sample to be tested. Qualitative and quantitative spectral analysis is well known to those skilled in the art, and will not be elaborated upon further in this application.

[0065] Preferably, the first optical fiber 41, the second optical fiber 43, and the third optical fiber 44 can be integrated into the same optical fiber bundle.

[0066] refer to Figure 7 and Figure 8 As shown, the second probe 42 has several reflective plates 421 disposed inside. After the excitation light emitted by the laser emitter reaches the second probe 42 via the first optical fiber 41, the reflective plates 421 reflect the excitation laser, allowing it to exit from the center of the output end of the second probe 42 to illuminate the sample to be tested. Preferably, a first dichroic mirror 422 is also disposed in the reflected light path of the excitation laser to reflect the excitation laser and allow light scattered by the sample to pass through, thereby reducing the loss of scattered light entering the second probe 42.

[0067] The output end of the second probe 42 is also equipped with a light-collecting lens 423. The light-collecting lens 423 can collect the light scattered by the sample under test, so that as much of the light scattered by the sample under test as possible enters the second probe 42.

[0068] refer to Figure 7 and Figure 9As shown, the second probe 42 also contains a focusing mirror 424 and a second dichroic mirror 425. The focusing mirror 424 allows scattered light to converge before reaching the second dichroic mirror 425, narrowing the optical path and increasing the light intensity. After reaching the second dichroic mirror 425, some of the shorter wavelength light passes directly through the second dichroic mirror 425 into the second optical fiber 43, while the other part of the longer wavelength light is reflected by the second dichroic mirror 425 and the reflector 421 and then enters the third optical fiber 44. The shorter wavelength light reaches the Raman resolution unit of the analysis module after passing through the second optical fiber 43, while the longer wavelength light reaches the infrared resolution unit of the analysis module after passing through the third optical fiber 44. Based on the longer wavelength light, the surface temperature of the sample to be tested can be determined, so that the central control module 2 can adjust the power of the excitation laser emitted by the laser emitter of the second detection component 40 according to the surface temperature of the sample to be tested, thereby ensuring the safety and stability during detection.

[0069] Based on the aforementioned rapid metal corrosion screening device 1, this embodiment also provides a rapid metal corrosion screening method, including the following steps.

[0070] In step S1, based on the physical state of the sample to be tested, the hydrogen ion concentration data of the sample to be tested, and / or the composition data of each component of the sample to be tested, and the corresponding proportion data are obtained.

[0071] In some embodiments, the sample is in a liquid state, and the hydrogen ion concentration data, the component data, and the corresponding percentage data of the sample to be tested are obtained.

[0072] In some embodiments, the sample is in a solid or gaseous state, and the composition data of the sample to be tested, as well as the corresponding percentage data, are obtained.

[0073] In step S2, based on the component data and the corresponding proportion data, the corrosion equivalent concentration or corrosion equivalent value of the sample to be tested is obtained.

[0074] In some embodiments, the corrosion equivalent concentration can be calculated using the following formula (1).

[0075]

[0076] Where Q is the corrosion equivalent concentration, which is dimensionless; R n w is the corrosion coefficient of the nth component, dimensionless; n This represents the percentage of the nth component, dimensionless; n is an integer greater than or equal to 1. The percentage data can be mass fraction, volume fraction, or mole fraction.

[0077] In some embodiments, if a component is corrosive to metals, the corrosion coefficient of that component is 1; if a component is not corrosive to metals, the corrosion coefficient of that component is 0.

[0078] In some implementations, if a widely accepted standard or regulation specifies a concentration limit for a substance that is not equal to 5%, the corrosion equivalent value can be calculated using the following formula (2).

[0079]

[0080] Where q is the corrosion equivalent value, which is dimensionless; R n w is the corrosion coefficient of the nth component, dimensionless; n The percentage data for the nth component is dimensionless; L n Let n be the concentration limit of the nth component, dimensionless; n is an integer greater than or equal to 1.

[0081] Similarly, if a component is corrosive to metals, its corrosion coefficient is 1; if a component is not corrosive to metals, its corrosion coefficient is 0.

[0082] In step S3, based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, it is determined whether the sample to be tested has metallic corrosivity.

[0083] In some implementations, if -lgC H ≥11 or -lgC H If the value is ≤3, then the sample to be tested can be directly determined to have metallic corrosiveness. Wherein, C H The hydrogen ion concentration of the sample to be tested is expressed in mol / L.

[0084] In some implementations, for the test sample in solid or gaseous state, if the corrosion equivalent concentration is greater than or equal to 5%, the test sample can be directly determined to have metallic corrosivity.

[0085] In some embodiments, for the liquid sample to be tested, if 3 < -lgC H If the corrosion equivalent concentration is less than 5%, the sample to be tested is determined to be non-corrosive to metals. For the sample to be tested in solid or gaseous state, if the corrosion equivalent concentration is less than 5%, the sample to be tested is determined to be non-corrosive to metals.

[0086] In some implementations, for the solid or gaseous sample to be tested, if the corrosion equivalent value is greater than or equal to 1, the sample to be tested can be directly determined to have metallic corrosivity.

[0087] In some embodiments, for the liquid sample to be tested, if 3 < -lgC H If the corrosion equivalent value is less than 1 and the value is less than 1, then the sample to be tested is determined to be non-corrosive to metals. For the sample to be tested in solid or gaseous state, if the corrosion equivalent value is less than 1, then the sample to be tested is determined to be non-corrosive to metals.

[0088] Example 1

[0089] Based on the above-mentioned rapid screening device 1 and method for metal corrosion, it is used to detect whether the liquid sample A to be tested has metal corrosivity.

[0090] In step S101, based on the physical state of the sample to be tested, the hydrogen ion concentration data of the sample A to be tested, as well as the composition data of each component of the sample A to be tested and the corresponding proportion data are obtained through the device 1.

[0091] The hydrogen ion concentration in sample A was measured to be 10 using device 1. -1.5 The concentration of mol / L in the sample A is 8% chloric acid and 92% water.

[0092] In step S201, based on the component data and the corresponding proportion data, the corrosion equivalent concentration or corrosion equivalent value of the sample A to be tested is obtained.

[0093] The corrosion equivalent concentration of the sample A to be tested can be obtained as 8% using the above formula (1).

[0094] In step S301, based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, it is determined whether the sample A to be tested has metallic corrosivity.

[0095] Obviously, -lgC H =1.5 is less than 3, and the corrosion equivalent concentration is greater than 5%. Therefore, it can be determined that the sample A to be tested has metallic corrosiveness.

[0096] Example 2

[0097] Based on the above-mentioned rapid screening device 1 and method for metal corrosion, it is used to detect whether the liquid sample B has metal corrosivity.

[0098] In step S102, based on the physical state of the sample to be tested, the hydrogen ion concentration data of the sample B to be tested, as well as the composition data of each component of the sample B to be tested and the corresponding proportion data are obtained through the device 1.

[0099] The hydrogen ion concentration of sample B was measured to be 10 using device 1. -2.7 The sample B to be tested contains 3% hydrofluoric acid, 27% nitric acid, and 70% water at a concentration of mol / L.

[0100] In step S202, based on the component data and the corresponding proportion data, the corrosion equivalent concentration or corrosion equivalent value of the sample B to be tested is obtained.

[0101] The corrosion equivalent concentration of the sample B to be tested is 30% by formula (1) above, and the corrosion equivalent value of the sample B to be tested is 9.6 by formula (2) above.

[0102] In step S302, based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, it is determined whether the sample B to be tested has metallic corrosivity.

[0103] Obviously, -lgC H =2.7 is less than 3, the corrosion equivalent concentration is greater than 5%, and the corrosion equivalent value is greater than 1. Therefore, it can be determined that the sample B to be tested has metallic corrosiveness.

[0104] Example 3

[0105] Based on the above-mentioned rapid screening device 1 and method for metal corrosion, it is used to detect whether the liquid sample C to be tested has metal corrosivity.

[0106] In step S103, based on the physical state of the sample to be tested, the hydrogen ion concentration data of the sample to be tested C, as well as the composition data of each component of the sample to be tested C and the corresponding proportion data are obtained through the device 1.

[0107] The hydrogen ion concentration in sample C was measured to be 10 using device 1. -7 The concentration of potassium chloride in the sample C is mol / L, and the sample contains 0.3% potassium chloride and 99.7% water.

[0108] In step S203, based on the component data and the corresponding proportion data, the corrosion equivalent concentration or corrosion equivalent value of the sample C to be tested is obtained.

[0109] The corrosion equivalent concentration of the sample C to be tested can be obtained as 0 using the above formula (1).

[0110] In step S303, based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, it is determined whether the sample C to be tested has metallic corrosivity.

[0111] Obviously, -lgC H =7 is greater than 3, and the corrosion equivalent concentration is less than 5%. Therefore, it can be determined that the sample C to be tested does not have metallic corrosiveness.

[0112] Example 4

[0113] Based on the above-mentioned rapid screening device 1 and method for metal corrosion, it is used to detect whether the solid sample D to be tested has metal corrosion.

[0114] In step S104, based on the physical state of the sample to be tested, the composition data of each component of the sample D to be tested and the corresponding proportion data are obtained by the device 1.

[0115] The apparatus 1 determined that the sample D contained 10% hydroxylamine sulfate and 90% sodium chloride.

[0116] In step S204, based on the component data and the corresponding proportion data, the corrosion equivalent concentration or corrosion equivalent value of the sample D to be tested is obtained.

[0117] The corrosion equivalent concentration of the sample D to be tested can be obtained as 10% using the above formula (1).

[0118] In step S304, based on the corrosion equivalent concentration, it is determined whether the sample D to be tested has metallic corrosiveness.

[0119] Clearly, the corrosion equivalent concentration is greater than 5%. Therefore, it can be determined that the sample D to be tested is metallic corrosive.

[0120] Example 5

[0121] Based on the above-mentioned rapid screening device 1 and method for metal corrosion, it is used to detect whether the liquid sample E to be tested has metal corrosivity.

[0122] In step S105, based on the physical state of the sample to be tested, the hydrogen ion concentration data of the sample to be tested E, as well as the composition data of each component of the sample to be tested E and the corresponding proportion data are obtained through the device 1.

[0123] The hydrogen ion concentration in sample E was measured to be 10 using device 1. -3.7 The sample E to be tested contains 30% lactic acid, 5% surfactant, and 65% water at a concentration of mol / L.

[0124] In step S205, based on the component data and the corresponding proportion data, the corrosion equivalent concentration or corrosion equivalent value of the sample E to be tested is obtained.

[0125] The corrosion equivalent concentration of the sample E to be tested is 30% using the above formula (1).

[0126] In step S305, based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, it is determined whether the sample E to be tested has metallic corrosivity.

[0127] Obviously, -lgC H=3.7, which is greater than 3, but the corrosion equivalent concentration is greater than 5%. Therefore, it can be determined that the sample E to be tested has metallic corrosiveness.

[0128] Example 6

[0129] Based on the above-mentioned rapid screening device 1 and method for metal corrosion, it is used to detect whether the liquid sample F to be tested has metal corrosivity.

[0130] In step S106, based on the physical state of the sample to be tested, the hydrogen ion concentration data of the sample F to be tested is obtained through device 1.

[0131] Since the sample F to be tested is a black liquid, it is impossible to obtain an effective spectrum, and therefore it is impossible to obtain the composition data of each component of the sample F to be tested, as well as the corresponding proportion data.

[0132] The hydrogen ion concentration in sample F was measured to be 10 using device 1. -2 mol / L.

[0133] In step S306, based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, it is determined whether the sample F to be tested has metallic corrosivity.

[0134] Obviously, -lgC H =2 is less than 3. Therefore, it can be determined that the sample F to be tested has metallic corrosiveness.

[0135] Example 7

[0136] Based on the above-mentioned rapid screening device 1 and method for metal corrosion, it is used to detect whether the gaseous sample G to be tested has metal corrosivity.

[0137] In step S107, based on the physical state of the sample to be tested, the composition data of each component of the sample G to be tested and the corresponding proportion data are obtained by the device 1.

[0138] The sample G to be tested contains 100% hydrogen fluoride.

[0139] In step S207, based on the component data and the corresponding proportion data, the corrosion equivalent concentration or corrosion equivalent value of the sample G to be tested is obtained.

[0140] The corrosion equivalent concentration of the sample G to be tested can be obtained as 100% using the above formula (1).

[0141] In step S307, based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, it is determined whether the sample G to be tested has metallic corrosivity.

[0142] Clearly, the corrosion equivalent concentration is greater than 5%. Therefore, it can be determined that the sample G to be tested is metallic corrosive.

[0143] Example 8

[0144] Based on the above-mentioned rapid screening device 1 and method for metal corrosion, it is used to detect whether the solid sample H to be tested has metal corrosion.

[0145] In step S108, based on the physical state of the sample to be tested, the composition data of each component of the sample H to be tested and the corresponding proportion data are obtained by the device 1.

[0146] During detection, the excitation laser emitted by the laser emitter of the second detection component 40 illuminates the surface of the sample H to be tested. The sample H causes the excitation laser to scatter, and the scattered light enters the second probe 42 through the light-collecting lens 423. The light-collecting lens 424 converges the scattered light entering the second probe 42, narrowing the optical path and increasing the light intensity. After reaching the second dichroic mirror 425, a portion of the shorter wavelength light passes directly through the second dichroic mirror 425 into the second optical fiber 43, while the other portion of the longer wavelength light is reflected by the second dichroic mirror 425 and the reflector 421 and then enters the third optical fiber 44.

[0147] When device 1 detects an abnormal temperature rise on the surface of the sample H through the light entering the third optical fiber 44, device 1 stops the test. At this time, the surface of the sample H has slight scorch marks visible to the naked eye.

[0148] The central control mechanism 2 of device 1 reduces the output power of the laser emitter based on the light entering the third optical fiber 44, so that the test can be repeated after the test site is changed.

[0149] In step S208, the corrosion equivalent concentration of the sample H to be tested is obtained as 15%.

[0150] In step S308, based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, it is determined whether the sample H to be tested has metallic corrosiveness.

[0151] Clearly, the corrosive equivalent concentration of the sample H to be tested is greater than 5%. Therefore, it can be determined that the sample H to be tested is metallic corrosive.

[0152] Comparative Example 1

[0153] The metallic corrosivity of the liquid sample A was tested using existing equipment, and the testing standard was the United Nations Recommendation on the Transport of Dangerous Goods: Manual of Tests and Criteria.

[0154] In step D101, prepare three 2 mm thick metal plates (an aluminum plate, a non-composite 7075-T6 or AZ5GU-T6 aluminum alloy plate, and an S235JR+CR or S275J2G3+CR steel plate in that order). Grind the metal plates with 120 grit sandpaper, remove the residual sand particles with an alcohol ultrasonic bath, and remove the oil stains with acetone before weighing the metal plates.

[0155] In step D201, 1.5L of the sample A to be tested is added to the device, and the constant temperature is set to 55℃. After the device temperature stabilizes at 55℃, the pre-treated metal plates are fixed with non-protruding PTFE wire. The first metal plate is completely immersed in the solution, with its upper edge about 10 mm away from the liquid surface; the second metal plate is only half-immersed; the third metal plate is suspended in the air for 168 hours.

[0156] In step D301, each metal plate is cleaned with a synthetic or natural bristle brush. For residues that cannot be removed by mechanical means, an inhibitory acid is used for cleaning. Finally, the metal plates are cleaned and dried with an ultrasonic bath of alcohol or acetone. The weight of the metal plates is weighed, the corrosion depth is tested, and the corrosion rate is calculated to be 16.2%.

[0157] Therefore, it can be determined that sample A has metallic corrosiveness.

[0158] Comparative Example 2

[0159] According to the list of hazardous chemicals, the sample A to be tested (8% chloric acid and 92% water) is corrosive to metals.

[0160] Comparative Example 3

[0161] The metallic corrosivity of the liquid sample B was tested using existing equipment, and the testing standard was the United Nations Recommendation on the Transport of Dangerous Goods Manual of Tests and Criteria.

[0162] In step D103, prepare three 2 mm thick metal plates (an aluminum plate, a non-composite 7075-T6 or AZ5GU-T6 aluminum alloy plate, and an S235JR+CR or S275J2G3+CR steel plate in that order). Grind the metal plates with 120 grit sandpaper, remove the residual sand particles with an alcohol ultrasonic bath, and remove the oil stains with acetone before weighing the metal plates.

[0163] In step D203, 1.5L of the sample B to be tested is added to the device, and the constant temperature is set to 55℃. After the device temperature stabilizes at 55℃, the pre-treated metal plates are fixed with non-protruding PTFE wire. The first metal plate is completely immersed in the solution, with its upper edge about 10 mm away from the liquid surface; the second metal plate is only half-immersed; the third metal plate is suspended in the air for 168 hours.

[0164] In step D303, each metal plate is cleaned with a synthetic or natural bristle brush. For residues that cannot be removed by mechanical means, an inhibitory acid is used for cleaning. Finally, the metal plates are cleaned and dried with an ultrasonic bath of alcohol or acetone. The weight of the metal plates is weighed, the corrosion depth is tested, and the corrosion rate is calculated to be 14.1%.

[0165] Therefore, it can be determined that sample B has metallic corrosiveness.

[0166] Comparative Example 4

[0167] The metal corrosivity of the liquid sample C was tested using existing equipment, and the testing standard was the United Nations Recommendation on the Transport of Dangerous Goods: Manual of Tests and Criteria.

[0168] In step D104, prepare three 2 mm thick metal plates (an aluminum plate, a non-composite 7075-T6 or AZ5GU-T6 aluminum alloy plate, and an S235JR+CR or S275J2G3+CR steel plate, in that order). Grind the metal plates with 120 grit sandpaper, then remove the residual sand particles with an alcohol ultrasonic bath, and finally remove the oil stains with acetone before weighing the metal plates.

[0169] In step D204, 1.5L of the sample C to be tested is added to the device, and the constant temperature is set to 55℃. After the device temperature stabilizes at 55℃, the pre-treated metal plates are fixed with non-protruding PTFE wires. The first metal plate is completely immersed in the solution, with its upper edge about 10 mm away from the liquid surface; the second metal plate is only half-immersed; the third metal plate is suspended in the air for 168 hours.

[0170] In step D304, each metal plate is cleaned with a synthetic or natural bristle brush. For residues that cannot be removed by mechanical means, an inhibitory acid is used for cleaning. Finally, the metal plates are cleaned and dried with an ultrasonic bath of alcohol or acetone. The weight of the metal plates is then weighed, the corrosion depth is tested, and the corrosion rate is calculated to be 0.

[0171] Therefore, it can be determined that the sample C to be tested does not have metallic corrosiveness.

[0172] Comparative Example 5

[0173] According to the list of hazardous chemicals, the sample C to be tested (0.3% potassium chloride and 99.7% water) is not corrosive to metals.

[0174] Comparative Example 6

[0175] Existing equipment is unable to perform metal corrosion tests on solid sample D.

[0176] Comparative Example 7

[0177] According to the list of hazardous chemicals, the sample D to be tested (10% hydroxylamine sulfate and 90% sodium chloride) is corrosive to metals.

[0178] Comparative Example 8

[0179] The metallic corrosivity of the liquid sample E was tested using existing equipment, and the testing standard was the United Nations Recommendation on the Transport of Dangerous Goods: Manual of Tests and Criteria.

[0180] In step D108, prepare three 2 mm thick metal plates (an aluminum plate, a non-composite 7075-T6 or AZ5GU-T6 aluminum alloy plate, and an S235JR+CR or S275J2G3+CR steel plate, in that order). Grind the metal plates with 120 grit sandpaper, then remove the residual sand particles with an alcohol ultrasonic bath, and finally remove the oil stains with acetone before weighing the metal plates.

[0181] In step D208, 1.5L of the sample E to be tested is added to the device, and the constant temperature is set to 55℃. After the device temperature stabilizes at 55℃, the pre-treated metal plates are fixed with non-protruding PTFE wires. The first metal plate is completely immersed in the solution, with its upper edge about 10 mm away from the liquid surface; the second metal plate is only half-immersed; the third metal plate is suspended in the air for 168 hours.

[0182] In step D308, each metal plate is cleaned with a synthetic or natural bristle brush. Residues that cannot be removed mechanically are cleaned with an inhibitory acid. Finally, the plates are cleaned and dried using an ultrasonic bath with alcohol or acetone. The weight of the metal plates is then measured, and the corrosion depth is tested. The maximum corrosion depth of sample E on the metal plate is 170 μm, exceeding 120 μm.

[0183] Therefore, it can be determined that the sample E to be tested has metallic corrosiveness.

[0184] Comparative Example 9

[0185] By consulting the list of hazardous chemicals, it was not possible to determine whether the sample D (30% lactic acid, 5% surfactant, 65% water) was corrosive to metals.

[0186] Comparative Example 10

[0187] The metallic corrosivity of the liquid sample F was tested using existing equipment, with the testing standard being the United Nations' Manual of Tests and Criteria for the Transport of Dangerous Goods.

[0188] In step D1010, prepare three 2 mm thick metal plates (an aluminum plate, a non-composite 7075-T6 or AZ5GU-T6 aluminum alloy plate, and an S235JR+CR or S275J2G3+CR steel plate in that order). Grind the metal plates with 120 grit sandpaper, remove the residual sand particles with an alcohol ultrasonic bath, and remove the oil stains with acetone before weighing the metal plates.

[0189] In step D2010, 1.5L of the sample F to be tested is added to the device, and the constant temperature is set to 55℃. After the device temperature stabilizes at 55℃, the pre-treated metal plates are fixed with non-protruding PTFE wire. The first metal plate is completely immersed in the solution, with its upper edge about 10 mm above the liquid surface; the second metal plate is only half-immersed; the third metal plate is suspended in the air for 168 hours.

[0190] In step D3010, each metal plate is cleaned with a synthetic or natural bristle brush. For residues that cannot be removed by mechanical means, an inhibitory acid is used for cleaning. Finally, the metal plates are cleaned and dried with an ultrasonic bath of alcohol or acetone. The weight of the metal plates is weighed, the corrosion depth is tested, and the corrosion rate is calculated to be 20.1%.

[0191] Therefore, it can be determined that the sample F to be tested has metallic corrosiveness.

[0192] Comparative Example 11

[0193] According to the chemical safety data sheet, the sample G (hydrogen fluoride) to be tested is corrosive to metals.

[0194] As can be seen from the above embodiments one to eight, as well as comparative examples one and eleven, the metal corrosion rapid screening device 1 and method provided by the present invention can quickly and accurately assess the metal corrosion of the sample to be tested. It is not limited by the physical state of the sample to be tested, requires a small amount of sample to be tested, does not depend on laboratory conditions, and can effectively meet the real-time identification needs of customs, law enforcement and other on-site operations.

[0195] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0196] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0197] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rapid screening device for metal corrosion, comprising, Central control mechanism (2); The first detection mechanism (3) is electrically connected to the central control mechanism (2). The first detection mechanism (3) includes a first detection component (30). The first detection component (30) is configured to convert the hydrogen ion concentration in the sample to be tested into an electrical signal so as to obtain hydrogen ion concentration data. as well as The second detection mechanism (4) is electrically connected to the central control mechanism (2). The second detection mechanism (4) includes a second detection component (40), which is configured to obtain the spectra of each component in the sample to be tested, so as to obtain the composition data and proportion data of each component. The central control mechanism (2) is configured to assess the metal corrosivity of the sample to be tested based on the hydrogen ion concentration data, the composition data, and / or the proportion data.

2. The rapid screening device for metal corrosion according to claim 1, characterized in that, The first detection component (30) includes a housing (31), an inner housing (32) disposed within the housing (31), and a first probe (33) connecting the housing (31) and the inner housing (32). A first electrode (314) is disposed between the inner housing (32) and the housing (31), and a second electrode (322) is disposed inside the inner housing (32). The first electrode (314) and the second electrode (322) form a galvanic cell with the sample to be tested when the first probe (33) is immersed in the sample to be tested.

3. The rapid screening device for metal corrosion according to claim 2, characterized in that, The first cavity (311) between the outer shell (31) and the inner shell (32) is filled with a reference gel or solution. The lower end of the outer shell (31) is provided with a first sealing member (313). The first sealing member (313) is configured to act as a salt bridge connecting the first cavity (311) and the sample to be tested when the first probe (33) is immersed in the sample to be tested.

4. The rapid screening device for metal corrosion according to claim 2, characterized in that, The first probe (33) includes a housing (331), a third sealing member (332) disposed at the opening of the housing (331), and a connecting tube (333) disposed on the third sealing member (332). The connecting tube (333) is configured to be inserted into the second sealing member (324) at the lower end of the inner housing (32) when the first probe (33) is connected to the inner housing (32), so that the second cavity (321) inside the inner housing (32) communicates with the interior of the housing (331).

5. The rapid screening device for metal corrosion according to claim 4, characterized in that, The second sealing member (324) and the third sealing member (332) are provided with a plurality of protrusions (335), which are configured to increase the friction between the second sealing member (324) and the inner shell (32), and between the third sealing member (332) and the outer shell (331).

6. The rapid screening device for metal corrosion according to claim 5, characterized in that, The inner wall of the inner shell (32) and the inner wall of the opening of the shell (331) are also provided with protrusions (335). The protrusions (335) on the third sealing member (332) are configured to form a ratchet engagement with the protrusions (335) on the inner shell (32) and the protrusions (335) on the shell (331).

7. The rapid screening device for metal corrosion according to any one of claims 1-6, characterized in that, The second detection component (40) includes a first optical fiber (41) and a second probe (42) connected to the first optical fiber (41). The second probe (42) is provided with a plurality of reflective sheets (421). The plurality of reflective sheets (421) are configured to reflect the excitation laser passing through the first optical fiber (41) multiple times so that the excitation laser is emitted from the center of the output end of the second probe (42) to irradiate the sample to be tested.

8. The rapid screening device for metal corrosion according to claim 7, characterized in that, The output end of the second probe (42) is also provided with a light-collecting lens (423), which is configured to allow the light scattered by the sample to be tested after being irradiated by the excitation laser to enter the second probe (42).

9. The rapid screening device for metal corrosion according to claim 8, characterized in that, The second probe (42) is also equipped with a light-collecting mirror (424) and a second dichroic mirror (425). The light scattered by the sample to be tested enters the second probe (42) and is focused by the light-collecting mirror (424), and then reflected or refracted by the second dichroic mirror (425) so that it can enter the second optical fiber (43) or the third optical fiber (44).

10. The rapid screening device for metal corrosion according to claim 9, characterized in that, The wavelength of the light entering the second optical fiber (43) is less than the wavelength of the light entering the third optical fiber (44).

11. A rapid screening method for metal corrosion, characterized in that, The apparatus (1) used in any one of claims 1-10, Includes the following steps, Step S1: Based on the physical state of the sample to be tested, obtain the hydrogen ion concentration data of the sample to be tested, and / or the composition data of each component of the sample to be tested, and the corresponding proportion data. Step S2: Based on the component data and the corresponding proportion data, obtain the corrosion equivalent concentration or corrosion equivalent value of the sample to be tested. Step S3: Based on the hydrogen ion concentration data, the corrosion equivalent concentration, and / or the corrosion equivalent value, determine whether the sample to be tested has metallic corrosiveness.

12. The rapid screening method for metal corrosion according to claim 11, characterized in that, In step S2, the corrosion equivalent concentration is calculated using the following formula: Where Q is the corrosion equivalent concentration, which is dimensionless; R n w is the corrosion coefficient of the nth component, dimensionless; n This represents the percentage of the nth component, dimensionless; n is an integer greater than or equal to 1.

13. The rapid screening method for metal corrosion according to claim 11, characterized in that, In step S2, the corrosion equivalent value is calculated using the following formula: Where q is the corrosion equivalent value, which is dimensionless; R n w is the corrosion coefficient of the nth component, dimensionless; n The percentage data for the nth component is dimensionless; L n Let n be the concentration limit of the nth component, dimensionless; n is an integer greater than or equal to 1.

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