Probe for metal corrosion detection and method for manufacturing the probe

Abstract

The embodiments of the present invention disclose a probe for metal corrosion detection and a method for manufacturing the probe. The probe according to the embodiments of the present invention includes a base; a first electrode detachably mounted on the base for connecting with the metal to be detected for metal corrosion detection; a second electrode mounted on the base for metal corrosion detection; and a first through hole provided on the base for mounting the first electrode, wherein the first through hole is provided with a plurality of fixed positions, and the plurality of fixed positions are used to fix the first electrode at different positions. The probe for metal corrosion detection according to the embodiments of the present invention can perform metal corrosion detection conveniently, efficiently and accurately.

Description

Technical Field

[0001] The invention belongs to the technical field of detection sensors, and in particular relates to a probe for metal corrosion detection and a method for manufacturing the probe. Background Art

[0002] Large steel structures on infrastructure such as bridges and buildings all use organic coatings to protect the base metal materials. Organic coatings will age under the influence of light, temperature, moisture, pollutants, etc. When the coating ages to a certain extent, its protective ability will decrease or even fail to prevent corrosion of the base metal materials. The corrosion of the base metal materials poses a threat to the safe service of large steel structures.

[0003] In order to prevent the impact of metal corrosion under organic coatings on structural safety, it is necessary to detect the corrosion of metal under organic coatings as early as possible. The earlier the corrosion under organic coatings is discovered, the more timely the maintenance can be carried out to avoid structural safety risks. At present, the methods for evaluating metal corrosion under organic coatings include testing the physical properties of the coating such as appearance and glossiness, but this method is not directly related to the corrosion under the coating, cannot accurately evaluate the corrosion under the coating, and cannot detect the early corrosion of the metal under the coating; another method is to use electrochemical methods for detection. One method of electrochemical detection is to use a two-electrode method to send a sinusoidal signal of a certain frequency to two electrodes, and then measure the response of the tested system (base metal material) to the sinusoidal signal. The electrochemical method can better detect the information of corrosion under the coating. This method has achieved great success in the laboratory, but in actual detection, due to the lack of a special probe, this method has the following problems:

[0004] (1) The installation of the on-site probe is inconvenient and unreliable. For example, the coating needs to be polished to expose the metal substrate, and the probe may fall off if it is fixed with tape.

[0005] (2) The test reproducibility and accuracy are poor. During the on-site manual installation, the inaccurate area of ​​the probe also affects the accuracy of the test results.

[0006] The above problems will reduce the efficiency and accuracy of the test and affect the application of electrochemical methods in corrosion detection under coatings. Therefore, it is hoped that there will be a new probe for metal corrosion detection and a method for manufacturing the probe. Summary of the invention

[0007] In view of the above problems, an object of the present invention is to provide a probe for metal corrosion detection and a method for manufacturing the probe, so as to perform metal corrosion detection conveniently, efficiently and accurately.

[0008] According to one aspect of the present invention, there is provided a probe for metal corrosion detection, comprising: a base; a first electrode detachably mounted on the base and used for connecting with a metal to be detected for metal corrosion detection; a second electrode mounted on the base and used for the metal corrosion detection; and a first through hole arranged on the base and used for mounting the first electrode, wherein the first through hole is provided with a plurality of fixed positions, and the plurality of fixed positions are used for fixing the first electrode at different positions.

[0009] Preferably, the first end of the first electrode is in a pointed cone shape, and the first end is used to be connected to the metal to be tested to perform metal corrosion detection.

[0010] Preferably, at least a portion of the first electrode and at least a portion of the base form a locking structure.

[0011] Preferably, the first electrode is provided with an external thread; the first through hole is provided with an internal thread matching the external thread; the internal thread and the external thread constitute the locking structure.

[0012] Preferably, the probe further comprises: a first electrode sleeve, disposed in the first through hole and used for mounting the first electrode, wherein at least a portion of the first electrode sleeve and at least a portion of the first electrode constitute a locking structure.

[0013] Preferably, the probe further comprises: a second through hole, provided on the base, for mounting the second electrode; and a fixing device, connected to the base, for fixing the probe on the metal to be measured.

[0014] Preferably, the fixing device comprises: a fixing ring connected to the base; and a suction cup respectively connected to the fixing ring and the metal to be tested, for fixing the probe on the metal to be tested, wherein a plurality of installation positions are provided on the base for installing the fixing ring.

[0015] Preferably, at least a portion of the base is made of insulating material.

[0016] According to another aspect of the present invention, a method for manufacturing a probe is provided, comprising the following steps: forming a first through hole and a second through hole on a base, wherein a second electrode is installed in the second through hole; and detachably installing a first electrode matching the first through hole in the first through hole.

[0017] Preferably, the first through hole and the second through hole are formed on the base, and the second electrode is installed in the second through hole, which includes: fixing the first electrode sleeve and the second electrode at the first position and the second position respectively; and casting around the first electrode sleeve and the second electrode to obtain the base, wherein the first electrode sleeve matches the first electrode and is used for the detachable installation of the first electrode.

[0018] The probe for metal corrosion detection according to the embodiment of the present invention can conveniently achieve contact and conduction between the first electrode and the metal to be detected, thereby reducing the installation workload.

[0019] According to the probe for metal corrosion detection of the embodiment of the present invention, the first end of the first electrode is in a pointed cone shape, which can pierce the coating on the surface of the metal to be tested and contact the metal to be tested, thereby ensuring the reliability of the probe.

[0020] According to the probe for metal corrosion detection in the embodiment of the present invention, at least a portion of the first electrode and at least a portion of the base form a locking structure, thereby ensuring the contact reliability between the first electrode and the metal to be detected.

[0021] According to the probe for metal corrosion detection of the embodiment of the present invention, the probe is flexibly fixed on the surface of the metal to be detected by a fixing device, and can be installed conveniently and reliably.

[0022] According to the manufacturing method of the probe of the embodiment of the present invention, the base is manufactured by casting, and the second electrode and the second electrode sleeve are installed while the base is formed. The manufacturing method is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0024] Figure 1 A schematic diagram showing the structure of a probe according to a first embodiment of the present invention is shown;

[0025] Figure 2 A schematic diagram of the structure of a probe according to a second embodiment of the present invention is shown;

[0026] Figure 3 It shows a structural schematic diagram of a locking structure according to a third embodiment of the present invention;

[0027] Figure 4 It shows a structural schematic diagram of a locking structure according to a fourth embodiment of the present invention;

[0028] Figure 5 A flow chart showing a method for manufacturing a probe according to an embodiment of the present invention is shown;

[0029] Figure 6 A flow chart showing a method for manufacturing a probe according to a first embodiment of the present invention;

[0030] Figure 7 A schematic structural diagram of a mold for manufacturing a probe according to a first embodiment of the present invention is shown.

[0031] Description of reference numerals:

[0032] 1- base 2- first electrode 3- second electrode 4- first through hole

[0033] 5-second through hole 6-fixing device 61-fixing ring 62-suction cup

[0034] 11- eccentric wheel 41- protrusion 21- spring sheet 7- mold DETAILED DESCRIPTION

[0035] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, identical elements are represented by identical or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale. In addition, some well-known parts may not be shown in the drawings.

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. Many specific details of the present invention, such as the structure, materials, dimensions, processing technology and techniques of the components are described below to provide a clearer understanding of the present invention. However, as those skilled in the art will appreciate, the present invention may be implemented without following these specific details.

[0037] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0038] According to an embodiment of the present invention, a probe for metal corrosion detection includes a base; a first electrode, which is detachably mounted on the base and is used to connect with a metal to be detected for metal corrosion detection; a second electrode, which is mounted on the base and is used for metal corrosion detection; and a first through hole, which is arranged on the base and is used to install the first electrode, wherein the first through hole is provided with a plurality of fixed positions, and the plurality of fixed positions are used to fix the first electrode at different positions.

[0039] Figure 1 FIG. 2 shows a schematic diagram of the structure of a probe according to a first embodiment of the present invention. Figure 1As shown, the probe according to the first embodiment of the present invention includes a base 1 , a first electrode 2 , a second electrode 3 , a first through hole 4 and a second through hole 5 .

[0040] Specifically, the base 1 is provided with a first through hole 4 and a second through hole 5. The first through hole 4 is used to fix and / or install the first electrode 2. The first electrode 2 is movably connected to the first through hole 4. At least a portion of the first electrode 2 and at least a portion of the base 1, for example, form a locking structure. The second through hole 5 is used to fix and / or install the second electrode 3. The first electrode 2 and the second electrode 3 are respectively connected to a test instrument to perform metal corrosion detection.

[0041] In an optional embodiment of the present invention, the length of the first electrode 2 is greater than the length of the first through hole 4. The length of the second electrode 3 is greater than the length of the second through hole 5. One end of the first electrode 2 and / or the second electrode 3 is used to connect to a test instrument.

[0042] Optionally, at least a portion of the base 1 is made of insulating material, so that the first electrode 2 and the second electrode 3 are insulated from each other.

[0043] Optionally, the second electrode 3 is fixedly installed in the second through hole.

[0044] In a preferred embodiment of the present invention, the bottom (first end) of the first electrode 2 is in a pointed cone shape. When the probe according to the embodiment of the present invention is in use, the pointed cone at the first end of the first electrode 2 penetrates the metal to be tested to perform metal corrosion detection.

[0045] When the probe according to the first embodiment of the present invention is used, the base 1 is placed at the part to be detected; the first electrode 2 is installed so that at least a part of the first electrode 2 is in direct contact with the metal to be detected; the first electrode 2 and the base 1 are locked; the second electrode 3 is installed (if the second electrode 3 is fixedly installed, this installation step is not required); the first electrode 2 and the second electrode 3 are respectively connected to the test instrument to perform metal corrosion detection. Optionally, the test instrument is connected to the reference electrode, and the probe according to the embodiment of the present invention and the test instrument form a three-electrode system. Optionally, a sinusoidal signal of a certain frequency is sent to the first electrode 2 and the second electrode 3, and then the corrosion condition of the metal to be tested is obtained based on the reflection of the metal to be tested to the sinusoidal signal.

[0046] Figure 2 FIG. 2 shows a schematic diagram of the structure of a probe according to a second embodiment of the present invention. Figure 2 As shown, the probe according to the second embodiment of the present invention comprises a base 1, a first electrode 2, a second electrode 3, a first through hole 4, a second through hole 5 and a fixing device 6. Optionally, the fixing device 6 comprises a fixing ring 61 and a suction cup 62.

[0047] Specifically, the base 1 is, for example, a cylinder made of resin, and is used for mounting other parts of the probe.

[0048] The first electrode 2 is, for example, a working electrode column. Optionally, the first electrode 2 is, for example, an M10 square head screw, made of stainless steel or (ordinary) carbon steel. Preferably, the head of the first electrode 2 is a pointed cone, and the angle of the pointed cone is, for example, 75°.

[0049] The second electrode 3 is, for example, a counter electrode column. Optionally, the second electrode 3 is, for example, a flat head rivet made of brass or other copper alloys. Optionally, the lower surface of the second electrode 3 is flush with the lower surface of the base 1 .

[0050] The fixing device 6 is used to fix the probe to the part to be tested. The fixing device 6 includes, for example, a fixing ring 61 and a suction cup 62. The fixing ring 61 is movably connected to the base 1 and can be connected to different positions on the base 1. The fixing ring 61 is, for example, a circular ring made of silicone rubber, and its inner diameter is slightly smaller than the outer diameter of the base 1. The fixing ring 61 is directly sleeved on the base 1, and its position on the base 1 can be adjusted according to the needs of the test. At least one suction cup 62 is connected to the fixing ring 61. The suction cup 62 is adsorbed at a specific position to fix the probe to the part to be tested. The material of the suction cup 62 is, for example, silicone rubber, and the probe head can be fixed by exhausting air to form a negative pressure.

[0051] In an optional embodiment of the present invention, the fixing device 6 is a magnet, which is arranged on both sides of the base 1 and is used to adsorb and fix the probe to the part to be tested.

[0052] In a preferred embodiment of the present invention, at least a portion of the first electrode 2 and at least a portion of the first through hole 4 form a locking structure. For example, the first electrode 2 is provided with an (external) thread, and the first through hole 4 is provided with an (internal) thread matching the thread on the first electrode 2. When the first electrode 2 is installed, the first electrode 2 is fixed at a specific position in the first through hole 4 by twisting the first electrode 2. The thread pair (locking structure) formed by the (internal and external) threads on the first electrode 2 and the first through hole 4 can play a locking role to prevent the first electrode 2 from moving in the first through hole 4.

[0053] In an optional embodiment of the present invention, a first electrode sleeve is disposed in the first through hole 4. The first electrode sleeve matches the first electrode 2 and is used for mounting the first electrode 2. The first electrode 2 is, for example, a working electrode column, and the first electrode sleeve is, for example, a working electrode column sleeve. The material of the first electrode sleeve is, for example, the same as that of the first electrode 2.

[0054] In an optional embodiment of the present invention, a scale is provided on the first electrode 2. The scale on the first electrode 2 can reflect the installation position of the first electrode 2. Specifically, a scale is provided on the working electrode column, and the scale can reflect the installation depth of the working electrode column, and further can reflect the length of the pointed cone portion of the working electrode column piercing into the metal (i.e., the length of the pointed cone protruding from the lower surface of the base 1).

[0055] like Figure 2 As shown, in an optional embodiment of the present invention, the base 1 is a cylinder with a diameter of 50 mm and a height of 30 mm. The inner diameter of the fixing ring 61 is slightly smaller than 50 mm, and the outer diameter is 55 mm. The diameter of the suction cup 62 is 20 mm. The first electrode 2 is an M10 square head screw with a thread length of 30 mm and a total length of 50 mm. The first electrode sleeve matches the first electrode 2, and its length is 30 mm, and the thickness of the sleeve is 5 mm. The second electrode is a flat head rivet with a length of 50 mm and a diameter of the bare rod portion of 10 mm. The cylindrical center line of the base 1, the cylindrical center line of the first electrode sleeve (first electrode 2), and the cylindrical center line of the second electrode 3 are parallel to each other and arranged on a plane. The cylindrical center of the first electrode sleeve (first electrode 2) and the cylindrical center of the second electrode 3 are both 10 mm away from the center of the base 1.

[0056] When the probe according to the second embodiment of the present invention is used, the following steps are included:

[0057] Place the probe at the site to be tested;

[0058] Twist the working electrode column so that the (head) tip of the working electrode column pierces the metal to be tested;

[0059] Secure the probe using a fixture;

[0060] Connect the counter electrode column (fixedly installed on the base) and the column head of the working electrode column to the test instrument to perform metal corrosion detection.

[0061] In an optional embodiment of the present invention, the probe according to the second embodiment of the present invention is used to detect the corrosion of metal under the organic coating. When the probe according to the second embodiment of the present invention is used, it includes the following steps:

[0062] Choose a large, relatively flat coating surface;

[0063] Clean the selected coating surface and the probe surface to ensure there is no dirt;

[0064] Pressing the working surface of the probe (e.g., the lower surface of the base 1) onto the coating surface to be measured;

[0065] The working electrode column is twisted so that the tip of the working electrode column penetrates the organic coating and contacts the metal under the coating to play a conductive role;

[0066] Fix the probe with a suction cup;

[0067] After fixing the probe, twist the working electrode column again to ensure that the tip of the working electrode column contacts the metal under the coating;

[0068] Connect the counter electrode column and the working electrode column to the testing instrument to perform metal corrosion detection.

[0069] Figure 3 FIG. 2 shows a schematic structural diagram of a locking structure according to a third embodiment of the present invention. Figure 3 As shown, the locking structure according to the third embodiment of the present invention is, for example, an eccentric locking structure. An eccentric wheel 11 is provided on the base 1. After the first electrode 2 is installed at a suitable position, the eccentric wheel 11 is rotated to fix and lock the first electrode 11.

[0070] Figure 4 FIG. 4 shows a schematic structural diagram of a locking structure according to a fourth embodiment of the present invention. Figure 4 As shown, a plurality of protrusions 41 are provided in the first through hole 4. A spring sheet 21 matching the plurality of protrusions is provided on the first electrode 2. The first electrode 2 can move in the first through hole 4 under the action of an external force. After the first electrode 2 moves to a suitable position, the protrusion 41 and the spring sheet 21 form a locking structure, which can prevent the first electrode 2 from moving significantly in the first through hole 4.

[0071] Figure 5 FIG. 2 is a flow chart showing a method for manufacturing a probe according to an embodiment of the present invention. Figure 5 As shown, the manufacturing method of the probe according to the embodiment of the present invention comprises the following steps:

[0072] In step S101, a first through hole and a second through hole are formed on the base, and a second electrode is installed in the second through hole;

[0073] A first through hole and a second through hole are formed on the base, for example, by drilling the first through hole and the second through hole with a drill bit, and the second electrode is fixedly installed in the second through hole.

[0074] In step S102, a first electrode matching the first through hole is detachably installed in the first through hole.

[0075] A first electrode matching the first through hole is detachably installed in the first through hole.

[0076] Figure 6 A flow chart of a method for manufacturing a probe according to a first embodiment of the present invention is shown. Figure 7FIG. 2 shows a schematic structural diagram of a mold for manufacturing a probe according to a first embodiment of the present invention. Figure 6 and Figure 7 As shown, the manufacturing method of the probe according to the first embodiment of the present invention comprises the following steps:

[0077] In step S201, the first electrode sleeve and the second electrode are fixed at a first position and a second position respectively;

[0078] The working electrode column sleeve (first electrode sleeve) and the counter electrode column (second electrode) are fixed at the first position and the second position respectively, and the bottom of the working electrode column sleeve is sealed with tape, for example. The first electrode sleeve matches the first electrode and is used for detachable installation of the first electrode.

[0079] In step S202, a base is cast around the first electrode sleeve and the second electrode;

[0080] Will be like Figure 7 The mold 7 shown is placed around the working electrode column sleeve and the counter electrode column, and a curable resin or glue is poured into the mold for molding, and taken out after curing. Optionally, the mold 7 is a cylindrical plastic material, and a release agent is inside the mold 7.

[0081] In step S203, a first electrode matching the first electrode sleeve is detachably installed in the first electrode sleeve.

[0082] The working electrode column matching the working electrode column sleeve is detachably installed in the working electrode column sleeve.

[0083] In an optional embodiment of the present invention, after step S203, the working surface (lower surface) of the base is ground and polished.

[0084] In an optional embodiment of the present invention, the method for manufacturing the probe further includes:

[0085] Install the fixture on the base.

[0086] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0087] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A probe for metal corrosion detection, characterized in that: include: Base; A first electrode is detachably mounted on the base and is used to connect with the metal to be tested to perform metal corrosion detection; A second electrode, mounted on the base, for detecting metal corrosion; as well as A first through hole is provided on the base and is used for mounting the first electrode. Wherein, the metal surface to be tested has a coating; The first through hole is provided with a plurality of fixing positions, and the plurality of fixing positions are used to fix the first electrode at different positions; The first end of the first electrode is in a pointed cone shape, and the first end is used to pierce the coating and connect with the metal to be tested to perform metal corrosion detection; At least a portion of the base is made of insulating material.

2. The probe according to claim 1, characterized in that: At least a portion of the first electrode and at least a portion of the base form a locking structure.

3. The probe according to claim 2, characterized in that: The first electrode is provided with an external thread; The first through hole is provided with an internal thread matching the external thread; The internal thread and the external thread constitute the locking structure.

4. The probe according to claim 1, characterized in that: The probe further comprises: A first electrode sleeve is disposed in the first through hole and is used to install the first electrode. Wherein, at least a portion of the first electrode sleeve and at least a portion of the first electrode form a locking structure.

5. The probe according to claim 1, characterized in that: The probe further comprises: A second through hole, provided on the base, for mounting the second electrode; and A fixing device is connected to the base and is used to fix the probe on the metal to be tested.

6. The probe according to claim 5, characterized in that: The fixing device comprises: a fixing ring connected to the base; and A suction cup is connected to the fixing ring and the metal to be tested, and is used to fix the probe on the metal to be tested. Wherein, a plurality of installation positions are arranged on the base for installing the fixing ring.

7. A method for manufacturing a probe, used for manufacturing the probe according to any one of claims 1 to 6, characterized in that: The following steps are involved: A first through hole and a second through hole are formed on the base, wherein a second electrode is installed in the second through hole; and A first electrode matching the first through hole is detachably installed in the first through hole.

8. The manufacturing method according to claim 7, characterized in that: The first through hole and the second through hole are formed on the base, and the second electrode is installed in the second through hole, comprising: fixing the first electrode sleeve and the second electrode at a first position and a second position, respectively; and The base is cast around the first electrode sleeve and the second electrode. The first electrode sleeve matches the first electrode and is used for detachable installation of the first electrode.

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