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Chemistry test agent for chromium-plated layer and its application method

A technology of chemical inspection and chrome plating, which is applied in the field of chemical inspection agents, can solve the problems of inspection result errors, laborious, labor-intensive, etc., and achieve the effects of eliminating errors, accurate and reliable inspection results, and reducing labor intensity

Inactive Publication Date: 2004-06-02
广东轻工机械二厂有限公司
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  • Summary
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Problems solved by technology

Since the color of the base metal is relatively close to that of the chrome-plated layer, whether the chrome-plated parts are all plated with chrome layer, for some complex shapes, especially the chrome-plated layer on the inner wall of deep holes where the ratio of the depth of the hole to the inner diameter of the hole is equal to or exceeds 5 times, It is very laborious and labor-intensive to use the current "eye observation method"
And there are errors in the inspection results, and the accuracy of the results depends to a large extent on the work experience of the inspectors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Test agent: copper pinate 35 g / L, copper sulfate 10 g / L

[0017] Ammonia 13ml / L Water 942ml / L

[0018] Instructions:

[0019] a. Cleaning: Wipe the surface of the chrome-plated product to be inspected;

[0020] b. Immersion solution: Put the chrome-plated product to be inspected in the chemical inspection agent for 4 seconds and then take it out. The temperature of the inspection agent is room temperature;

[0021] c. Judgment: If there is no rose red on the surface of the chrome-plated part to be inspected, it indicates that the chrome-plated layer is complete and the plated part is qualified; unqualified;

[0022] d. Rinse and dry: wash the inspected chrome-plated parts with clean water and dry them.

[0023] In the above embodiment, copper pinate, copper sulfate and ammonia water can be selected: analytically pure grade.

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Abstract

The present invention is chemical inspection agent for detecting chromium coating on the surface of iron and steel product and its usage. Compared with available technology, the present invention has the features of accurate and reliable detection result and reduced labor strength. Technologically, the solution is that the chemical inspection agent consists of copper nitrate, copper sulfate, ammonia water and water. The detecting process includes cleaning, soaking, judgment, flushing, drying and other steps. The present invention is suitable for the detection of quality of chromium coating on the surface of iron and steel product.

Description

technical field [0001] The invention relates to a chemical inspection agent used for detecting the chromium plating layer on the surface of iron and steel products and its application method. Background technique [0002] Direct chrome plating on the surface of steel products has a wide range of uses in engineering. In the prior art, the appearance inspection of the chrome-plated layer on the surface of steel products adopts "the method of visual observation" both at home and abroad. Since the color of the base metal is relatively close to that of the chrome-plated layer, whether the chrome-plated parts are all plated with chrome layer, for some complex shapes, especially the chrome-plated layer on the inner wall of deep holes where the ratio of the depth of the hole to the inner diameter of the hole is equal to or exceeds 5 times, It is very laborious and labor intensive to use the existing "eye observation method". Moreover, there are errors in the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N31/22
Inventor 王子亮曾令先
Owner 广东轻工机械二厂有限公司
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