Tool for detecting quality of zinc layer of galvanized sheet and detection method

Abstract

The invention provides a tool for detecting the quality of a zinc layer of a galvanized sheet and a detection method, and relates to the technical field of chemical detection.The tool comprises a frame support, an upper cover and a lower base are fixedly arranged at the upper end and the lower end of the frame support respectively, and a sample is arranged between the upper cover and the lower base; a plurality of gaps are respectively formed in the upper and lower surfaces of the upper cover and the lower base, and the gaps in the upper and lower surfaces are vertically formed to form a liquid flowing channel; and the direction of the gap formed in the lower surface of the upper cover is consistent with that of the gap formed in the upper surface of the lower base. According to the invention, the working process is simplified, the working time is saved, the labor productivity is improved, compared with the conventional working method, the more samples to be detected are, the more obvious advantages are, the detection reagent is saved, and the environmental pollution is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical detection, and in particular to a tool and a detection method for detecting the quality of zinc layer of a galvanized sheet. Background Art

[0002] For zinc layer quality inspection, the cleaning liquid cleans the oil, dust, water marks, etc. on the surface of the sample, and then fully dries it. Weigh its mass with a balance. Then immerse the sample in the test solution until the obvious effect stops, then wash it with water, wash it with ethanol, and finally dry it quickly (blow it dry with hot air). In this process, the sample piece is placed in a reaction vessel filled with stripping solution. Each reaction vessel can only hold one sample piece. It takes 10-15 minutes to operate one sample in the whole process.

[0003] Conventionally, one reaction vessel is used for testing one sample piece. If multiple samples are tested, the construction period is long, and the stripping liquid used repeatedly has a poor stripping effect. The stripping liquid needs to be re-prepared, which wastes reagents and increases the testing cost.

[0004] Therefore, the present invention uses a carrier that does not react with the stripping solution, stands the sample piece in the stripping solution, and marks the slots with numbers, so that multiple samples can react at one time, and then the sample rack is cleaned and dried as a whole. Summary of the invention

[0005] According to the above technical problem that the existing zinc layer quality detection takes a long time, a tool and a detection method for detecting the zinc layer quality of a galvanized sheet are provided. The method and the tool used for detecting the zinc layer quality of a galvanized sheet of the present invention mainly use a carrier that does not react with the stripping liquid, stand the sample piece in the stripping liquid, and mark the slot with a number mark, so that multiple samples can be reacted at one time, and then the sample rack is cleaned and dried as a whole.

[0006] The technical means adopted by the present invention are as follows:

[0007] A tool for detecting the quality of zinc layer of galvanized sheet, comprising a frame bracket, wherein an upper cover and a lower base are fixedly arranged at the upper and lower ends of the frame bracket respectively, a sample is placed between the upper cover and the lower base, a plurality of slits are respectively provided on the upper and lower surfaces of the upper cover and the lower base, and the slits on the upper and lower surfaces are vertically provided to form a liquid circulation channel; the direction of the slits provided on the lower surface of the upper cover is consistent with the direction of the slits provided on the upper surface of the lower base.

[0008] Furthermore, the frame support comprises a square frame composed of four support rods, each of the support rods is provided with an equidistant spiral distance, a triangular support is slidably connected within the spiral distance, and two of the support rods are provided with lifting rods;

[0009] The upper cover is provided with a lifting rod hole for a lifting rod to pass through, the upper end of the lifting rod passes through the lifting rod hole and is higher than the upper surface of the upper cover, and the upper cover can slide on the lifting rod and the support rod.

[0010] Furthermore, the upper cover and the lower base are made of polytetrafluoroethylene discs.

[0011] Furthermore, the gaps formed on the upper surface of the lower base are provided with numerical labels, and the gaps are formed in parallel with equal widths.

[0012] Furthermore, a movable pressing device is provided between the upper cover and the frame support for pressing the upper cover.

[0013] The present invention also provides a method for detecting the quality of the zinc layer of a galvanized sheet, comprising the following steps:

[0014] The samples were pretreated and the weight of the treated samples was measured to obtain W 1i ;

[0015] After placing the sample in the tooling, place the tooling with the sample in the prepared solution and take it out after the zinc coating of the sample is completely dissolved;

[0016] The dissolved tooling with the sample is cleaned and dried as a whole;

[0017] Take the samples out of the tooling and weigh them to get the mass W. 2i , the mass of the zinc layer of the sample is obtained by the calculation formula.

[0018] Furthermore, the pretreatment process includes cleaning and drying the oil, dust and water marks on the surface of the sample.

[0019] Furthermore, the preparation solution is prepared by dissolving 3.5 g of chemically pure hexamethylenetetramine in 500 ml of concentrated hydrochloric acid and diluting the solution to 1000 ml with distilled water or deionized water.

[0020] Furthermore, the cleaning and drying comprises the following steps: cleaning the dissolved device with the sample in clean water, cleaning the cleaned device in an ethanol solution and then drying it.

[0021] Furthermore, the calculation formula is:

[0022] W=(W 1i -W 2i )×10 6 / A

[0023] Where W is the mass of zinc layer per unit area, in g / m 2 ;

[0024] A is the surface area of ​​the specimen, in mm2 .

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The system of the present invention is easy to operate and easy to learn by other experimenters; the tooling is simple and common and easy to be used by other laboratories.

[0027] The detection process of the invention is short, and the production efficiency is greatly improved; compared with the original detection method, it saves working hours and production costs; the system is simple, convenient and easy to prepare, and can detect multiple samples at the same time, thereby improving production efficiency.

[0028] In summary, the present invention simplifies the working process, saves working time, and improves labor productivity. Compared with the previous working methods, the more samples to be tested, the more obvious the advantages are, and it saves detection reagents and reduces environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 It is a schematic diagram of the upper and lower sides of the lower base of the tooling in the present invention.

[0031] Figure 2 It is a top view of the tooling in the present invention.

[0032] Figure 3 It is an overall side view of the tooling in the present invention.

[0033] In the figure: 1. upper cover; 2. lower base; 3. frame bracket; 4. triangular bracket; 5. lifting rod; 6. sample; 7. reaction vessel; 8. clamping device. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0039] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0040] like Figure 1-3 As shown, the present invention provides a tool for detecting the quality of the zinc layer of a galvanized sheet, including a frame bracket 3, the upper and lower ends of the frame bracket 3 are respectively fixedly provided with an upper cover 1 and a lower base 2, the frame bracket 3 is movably connected to the upper cover 1, and is fixedly connected to the lower base 2, the sample is placed between the upper cover 1 and the lower base 2, and the galvanized sheet (sample) is placed in the gap during the detection process, so that a certain distance is maintained between the galvanized sheets, and the galvanized sheet can be made to stand in the liquid of the reaction vessel 7, the upper and lower surfaces of the upper cover 1 and the lower base 2 are respectively provided with a plurality of gaps, and the gaps on the upper and lower surfaces are vertically provided to form a liquid flow channel; the direction of the gap provided on the lower surface of the upper cover 1 is consistent with the direction of the gap provided on the upper surface of the lower base 2. In this way, the sample can be well contacted with the liquid, and the detection result is more accurate.

[0041] The frame bracket 3 is a square frame composed of four support rods, each support rod is provided with an equidistant spiral distance, and a triangular bracket 4 is slidably connected within the spiral distance, two of which are provided with lifting rods 5. The upper cover 1 can slide on the lifting rods to conveniently place the triangular bracket 4 loaded with the sample in the liquid of the reaction vessel 7, and it is also convenient to directly remove the frame bracket 3 after detection.

[0042] The upper cover 1 can better fix the galvanized sheet. The gap of the upper cover 1: one side is used to fix the galvanized sheet, and the other side is used for liquid circulation.

[0043] The upper cover 1 and the lower base 2 are made of a polytetrafluoroethylene disc or other discs of a material having the same properties as polytetrafluoroethylene and not reacting with the stripping liquid.

[0044] The triangular bracket 4 can be moved on the support rod and then fixed, so that the upper cover 1 does not directly act on the sample.

[0045] A movable clamping device 8 is provided on the upper surface of the upper cover 1. The movable clamping device 8 is bolt-clamped. A bolt clamping device 8 is provided between the upper cover 1 and the frame bracket 3. When it is necessary to open the upper cover 1 to take the sample piece, the bolt clamping device 8 is loosened so that the upper cover 1 can be taken down; when the sample is reacted or cleaned in the solution, the bolt clamping device 8 is tightened to fix the upper cover 1 on the frame bracket 3.

[0046] The present invention also provides a method for detecting the quality of the zinc layer of a galvanized sheet, comprising the following steps:

[0047] S1: According to the size of the reaction vessel used, select two suitable polytetrafluoroethylene discs as the upper cover 1 and the lower bottom plate, and open a number of grooves on the upper and lower surfaces. Each groove edge is marked with a corresponding number (mark the sample to be tested to avoid confusion).

[0048] S2: Make a detachable frame bracket 3 and install a lifting rod 5. The frame bracket 3 fixes the upper and lower polytetrafluoroethylene respectively, and the lifting rod 5 is convenient for personnel to operate and take the entire tooling as a whole.

[0049] S3. Clean the oil, dust and water stains on the surface of the sample, dry it, and weigh the mass W. 1i ,

[0050] Place the sample in the groove of the lower base 2, then cover the upper cover 1 and install the sample in the tooling;

[0051] Place the tool containing the sample piece 6 in the reaction vessel No. 1 containing the stripping solution to carry out the overall reaction, and take out the tool after there is no violent reaction;

[0052] Then put it into the No. 2 reaction vessel filled with deionized water for overall cleaning, and take out the overall cleaned tooling and put it into the No. 3 reaction vessel filled with ethanol for overall cleaning;

[0053] Take out the tooling after cleaning in ethanol, and put it into a No. 4 empty reaction vessel heated on a hot plate (the reaction vessel is placed on the hot plate in advance to make its interior dry and hot, forming a small high-temperature environment, which can make the sample piece dry quickly);

[0054] Accurately weigh the sample (W 1i ), place the sample in a reaction vessel for testing, clean it, dry it, and weigh it accurately (W 2i ).

[0055] W=(W 1i -W 2i )×10 6 / A

[0056] W-weight of zinc layer per unit area (g / m 2 )W 1i-The weight of the sample before the zinc layer of the sample is peeled off (g);

[0057] W 2i - weight of the sample after the zinc layer is peeled off (g); A- surface area of ​​the sample (mm 2 ).

[0058] Take out the sample and weigh W 2i And make calculations (remove the upper pressure plate of upper cover 1, loosen upper cover 1, but do not remove the upper cover, weigh which sample to take, and take which sample, so that multiple samples will not be mixed together due to accidents).

[0059] Example 1

[0060] Select 9 samples and accurately weigh the weight of the test piece (W 1i ), prepare the stripping solution for galvanized sheet quality inspection (3.5g chemically pure hexamethylenetetramine dissolved in 500ml concentrated hydrochloric acid, diluted to 1000ml with distilled water or deionized water), use a 500ml reaction vessel to test, place the sample piece in the reaction vessel, strip the zinc layer, wash it with deionized water, wash it with ethanol, and then blow it dry with a hot air blower, and accurately weigh it (W 2i ).

[0061] With the original method, it takes 10-15 minutes to peel each sample, and 2 hours to peel 9 samples. However, with the patented tool, 9 samples can be tested at once in 10-15 minutes, greatly shortening the testing time.

[0062] The test results are compared as follows:

[0063] Zinc layer mass unit: g / m 2

[0064] Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6 Sample 7 Sample 8 Sample 9 Original method 182.9 179.5 173.8 181.2 188.0 185.6 176.1 177.2 175.9 The present invention 183.2 179.1 172.9 181.9 188.8 184.9 175.6 176.5 176.6

[0065] By comparing the test time and test results, since the stripping solution used for the sample has not changed and the test time has not changed, there is not much difference in the test results of the two methods. In terms of test time, due to the patented method, the test time is greatly shortened, and the more samples are tested, the shorter the time is.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tool for detecting the quality of zinc layer of galvanized sheet, characterized in that: It comprises a frame bracket, wherein an upper cover and a lower base are fixedly arranged at the upper and lower ends of the frame bracket respectively, a sample is placed between the upper cover and the lower base, a plurality of slits are respectively provided on the upper and lower surfaces of the upper cover and the lower base, and the slits on the upper and lower surfaces are vertically provided to form a liquid flow channel; the direction of the slits provided on the lower surface of the upper cover is consistent with the direction of the slits provided on the upper surface of the lower base.

2. The tooling for detecting the quality of the zinc layer of the galvanized sheet according to claim 1 is characterized in that: The frame bracket comprises a square frame composed of four supporting rods, each supporting rod is provided with an equidistant spiral distance, a triangular bracket is slidably connected within the spiral distance, and two of the supporting rods are provided with lifting rods; The upper cover is provided with a lifting rod hole for a lifting rod to pass through, the upper end of the lifting rod passes through the lifting rod hole and is higher than the upper surface of the upper cover, and the upper cover can slide on the lifting rod and the support rod.

3. The tooling for detecting the quality of the zinc layer of the galvanized sheet according to claim 1 is characterized in that: The upper cover and the lower base are made of polytetrafluoroethylene discs.

4. The tooling for detecting the quality of the zinc layer of the galvanized sheet according to claim 1 is characterized in that: The gaps on the upper surface of the lower base are provided with numerical numbers, and the gaps are arranged in parallel with equal widths.

5. The tooling for detecting the quality of zinc layer of galvanized sheet according to claim 1 is characterized in that: A movable pressing device is arranged between the upper cover and the frame support for pressing the upper cover.

6. A method for detecting the quality of the zinc layer of a galvanized sheet, which is implemented based on the tooling used for detecting the quality of the zinc layer of a galvanized sheet as claimed in any one of claims 1 to 5, characterized in that: The steps include: The samples were pretreated and the weight of the treated samples was measured to obtain W 1i ; After placing the sample in the tooling, place the tooling with the sample in the prepared solution and take it out after the zinc coating of the sample is completely dissolved; The dissolved tooling with the sample is cleaned and dried as a whole; Take the samples out of the tooling and weigh them to get the mass W. 2i , the mass of the zinc layer of the sample is obtained by the calculation formula.

7. The method for detecting the quality of the zinc layer of the galvanized sheet according to claim 6, characterized in that: The pretreatment process includes cleaning and drying the oil, dust and water marks on the surface of the sample.

8. The method for detecting the quality of the zinc layer of the galvanized sheet according to claim 6, characterized in that: The preparation solution is prepared by dissolving 3.5 g of chemically pure hexamethylenetetramine in 500 ml of concentrated hydrochloric acid and diluting the solution to 1000 ml with distilled water or deionized water.

9. The method for detecting the quality of the zinc layer of the galvanized sheet according to claim 6, characterized in that: The cleaning and drying process comprises the following steps: cleaning the dissolved device with the sample in clean water, cleaning the cleaned device in an ethanol solution, and then drying it.

10. The method for detecting the quality of the zinc layer of a galvanized sheet according to claim 6, characterized in that: The calculation formula is: W=(W 1i -W 2i )×10 6 / A Where W is the mass of zinc layer per unit area, in g / m 2 ; A is the surface area of ​​the specimen, in mm 2 .

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