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Testing liquid and method for rapid testing chrome-plating layer corrosion-proof performance

A technology for testing liquid and chrome-plating layer, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring device, instrument, etc., can solve the problems of poor working environment, long time consumption, unsuitable for chrome plating layer, etc., to achieve chrome plating quality control and easy operation Effect

Inactive Publication Date: 2005-07-27
ZHEJIANG SIFANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the anti-corrosion performance index of the metal chromium plating layer, the salt spray test method is generally used at home and abroad to evaluate its anti-corrosion performance. The disadvantage of the salt spray test method is that it takes a long time (at least 8 hours), complicated operation, poor working environment, and requires The special salt spray test equipment is not suitable for daily chrome plating quality inspection; therefore, it is the main problem to be solved in daily chrome plating quality inspection to provide simple operation and quick test of metal chrome plating anti-corrosion performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 40 grams of sodium chloride and 20 grams of ammonium chloride and add water to dissolve; take 5 grams of potassium ferricyanide and add water to dissolve; combine and dilute the above solutions to 1000 ml to obtain the test solution.

[0015] The detection method is carried out according to the following steps:

[0016] A. First, use organic solvent or magnesium oxide paste to degrease the inspected part of the coating surface of the workpiece, then wash it with distilled water, and then dry it with filter paper or dry it in clean air;

[0017] B. Paste the filter paper soaked with the test solution on the surface of the tested part. Each filter paper is 10 square centimeters, and a total of three pieces are selected and pasted on three different tested parts. There should be no air between the coating surface and the test filter paper;

[0018] C. Remove the filter paper after sticking the filter paper for 10 minutes, rinse it with distilled water, and put it in a...

Embodiment 2

[0021] Take 60 grams of sodium chloride and 30 grams of ammonium chloride and add water to dissolve; take 10 grams of potassium ferricyanide and add water to dissolve; combine and dilute the above solutions to 1000 ml to obtain the test solution.

[0022] The detection method detects different parts of the same metal chrome-plated workpiece according to the method in Example 1, and the same result can be detected equally.

Embodiment 3

[0024] Take 80 grams of sodium chloride and 40 grams of ammonium chloride and add water to dissolve; take 15 grams of potassium ferricyanide and add water to dissolve; combine and dilute the above solutions to 1000 ml to obtain the test solution.

[0025] The detection method detects different parts of the same metal chrome-plated workpiece according to the method in Example 1, and the same result can be detected equally.

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PUM

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Abstract

A test liquid is prepared by mixing solution of 40-100g sodium chloride, 20-50g ammonium chloride and 5-20g potassium ferricyanide together and then diluting it to 1000 mL. The test method includes removing out oil on workpiece surface by organic solvent or magnesium oxide paste, cleaning it with distilled water, sticking filter paper soaked in test liquid on detected surface for 10 minutes, cleaning it with distilled water, checking corrosive spots and judging its anticorrosion property based on numbers of spots.

Description

technical field [0001] The invention relates to a method for detecting the corrosion resistance of a metal chrome plating layer, in particular to a test solution and a method for rapidly detecting the corrosion resistance of a chrome plating layer. Background technique [0002] The quality of the metal chrome plating layer is mainly determined by the thickness of the chrome plating layer and the anti-corrosion performance index of the chrome plating layer; if the plated part is a flat, solid workpiece, the thickness of the chrome plating layer is detected by a coating thickness gauge or a metallographic method; if the plated part is a hollow workpiece, the metallographic method is used detection. For the anti-corrosion performance index of the metal chromium plating layer, the salt spray test method is generally used at home and abroad to evaluate its anti-corrosion performance. The special salt spray test equipment is not suitable for daily chrome p...

Claims

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Application Information

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IPC IPC(8): G01N17/02G01N21/84
Inventor 陈强吴建敏孙陈明
Owner ZHEJIANG SIFANG GRP
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