Method for measuring plate coating metal weight

A technology of weight and coating, which is applied in the direction of measuring devices, material weighing, and analyzing materials, etc., can solve the problems of troublesome preparation of samples by chemical dissolution weighing method, poor control of coating dissolution end point, etc., to reduce under-dissolution or over-dissolution The effect of error, easy operation and high precision

Inactive Publication Date: 2003-06-25
中华人民共和国辽宁出入境检验检疫局 +1
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Problems solved by technology

[0003] The disadvantage of the chemical dissolution weighing method is that the dissolution end point of the coating is not easy to control, and it is usually determined whether the coating layer is dissolved based on the apparent characteristics such as whether bubbling continues, gas generation, etc.
[0004] In addition, the preparation of samples by chemical dissolution weighing method is cumbersome. Either ensure that the coating is uniform on all areas of the sample, or it is necessary to shield the parts that do not need to be dissolved, and finally ensure that the dissolved area is accurate.

Method used

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  • Method for measuring plate coating metal weight
  • Method for measuring plate coating metal weight
  • Method for measuring plate coating metal weight

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Embodiment Construction

[0026] according to figure 1 - As shown in Figure 3, the measurement method is as follows:

[0027] ① Prepare samples as required;

[0028] ②Clean and dry the sample, weigh it, and write down the weight data;

[0029] ③ Put the sample into the special test fixture, leaving an area of ​​75-3000mm to be dissolved;

[0030] ④Insert the special test fixture into the fixture bracket in the electrolytic cell;

[0031] ⑤According to the Coulomb thickness measurement method, use the computer to display the change curve of the dissolution of the sample coating in the fixture in the electrolytic cell. When the dissolution curve in the test image of the computer has an inflection point, the dissolution of the coating is complete. As shown in Figure 3, if When there is an alloy layer or other composite layers in the covering layer, two or more inflection points will appear, as shown in Figure 2;

[0032] ⑥ Take out the special test fixture in the electrolytic cell in time, and take ou...

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Abstract

The measuring process of plate coating metal weight includes clean sample, stoving, weighing, dissolving while the dissolving curve being displayed in computer until the curve exhibiting inflection point, taking out sample, washing, stoving, weighing to obtain the weight difference before and after dissolving, and calculating the weight unit area or coating thickenss. The said process is superior to traditional chemical dissolving process in that the Coulomb dissoving process makes it possible to obtain accurate dissolving end time. In case of composite coating or possessing middle alloy layer, the said process can the thickness of each layer.

Description

technical field [0001] The invention relates to a metal coating measurement technology, in particular to a method for measuring the weight of plate coating metal. Background technique [0002] The operation steps of the chemical dissolution weighing method widely used at present are: firstly weigh the cleaned and dried sample, then dissolve the covering layer with a chemical solvent; then weigh the cleaned and dried sample; The difference between the weighing of the before and after samples was calculated to obtain the covering layer thickness. [0003] The disadvantage of the chemical dissolution weighing method is that the dissolution end point of the coating is not easy to control, and it is usually determined whether the coating layer is dissolved or not based on the apparent characteristics such as whether bubbling continues or gas is generated. Therefore, the covering layer is easily dissolved insufficiently or excessively, and the measurement er...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
Inventor 董秀文李岩陈少猛凌国伟刘建国
Owner 中华人民共和国辽宁出入境检验检疫局
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