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Black oxidation method of stainless steel cathode

A black oxidation and stainless steel technology, applied in anodizing and other directions, can solve the problems that the appearance of the oxide film of the parts is not uniform, the qualification rate of primary oxidation is not high, and the energy consumption is high. Effect

Inactive Publication Date: 2014-09-10
河南平原光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the alkaline chemical oxidation method, the surface of the parts needs to be sandblasted before the pretreatment to ensure that the blackness of the film layer is uniform and does not bloom, and the bath solution is heated to above 100°C to operate, which consumes a lot of energy, and the parts with a large area are oxidized. The appearance of the film is not easy to be uniform, and the pass rate of primary oxidation is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of preparation method of electrolytic solution for stainless steel cathode black oxidation, it is characterized in that, comprises the following steps:

[0016] 1) Add copper sulfate and manganese sulfate to the water so that the two contents are 3g / l and 6g / l respectively, add disodium ethylenediamine diacetate to make the content 6g / l, stir well, adjust the pH to 4;

[0017] 2) Add sodium dihydrogen phosphate, sodium acetate, and sodium thiocyanate to make the contents 10g / l, 8g / l, and 4g / l respectively, and stir evenly.

[0018] A stainless steel cathode black oxidation method, adding the above electrolytic solution into the electrolytic tank, then adding 3 drops of nitrobenzene, stirring evenly, and then putting the cleaned parts into the tank and energizing oxidation for 10 minutes.

Embodiment 2

[0020] A kind of preparation method of electrolytic solution for stainless steel cathode black oxidation, it is characterized in that, comprises the following steps:

[0021] 1) Add copper sulfate and manganese sulfate to the water so that the two contents are 5g / l and 8g / l respectively, add disodium ethylenediamine diacetate to make the content 8g / l, stir well, and adjust the pH to 4.5;

[0022] 2) Add sodium dihydrogen phosphate, sodium acetate, and sodium thiocyanate to make the contents 12g / l, 10g / l, and 4.5g / l respectively, and stir evenly.

[0023] A stainless steel cathode black oxidation method, adding the above electrolytic solution into the electrolytic tank, then adding 5 drops of nitrobenzene, stirring evenly, and then putting the cleaned parts into the tank and energizing oxidation for 13 minutes.

Embodiment 3

[0025] A kind of preparation method of electrolytic solution for stainless steel cathode black oxidation, it is characterized in that, comprises the following steps:

[0026] 1) Add copper sulfate and manganese sulfate to the water so that the two contents are 4g / l and 7g / l respectively, add disodium ethylenediamine diacetate to make the content 7g / l, stir well, and adjust the pH with HCl or NaOH to 4.5;

[0027] 2) Add sodium dihydrogen phosphate, sodium acetate, and sodium thiocyanate to make the contents 11g / l, 9g / l, and 4g / l respectively, and stir evenly.

[0028] A stainless steel cathode black oxidation method, adding the above electrolytic solution into the electrolytic tank, then adding 4 drops of nitrobenzene, stirring evenly, and then putting the cleaned parts into the tank and energizing for oxidation for 11 minutes.

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PUM

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Abstract

The invention discloses a black oxidation method of a stainless steel cathode. The method comprises the steps of adding an electrolyte into an electrolytic tank, then adding three drops of nitrobenzene, uniformly stirring, then extending completely-cleaned parts into the tank, electrifying, and performing oxidation for 10 minutes. The problems that a chemical oxidation film layer is non-uniform in appearance and high in energy consumption and has heavy metal pollution can be solved by adopting the technical scheme disclosed by the invention; a film layer obtained by using the method is uniformly gray black to black in appearance, and is especially suitable for stainless steel parts for extinction required by optical instruments.

Description

technical field [0001] The invention relates to a stainless steel cathode black oxidation method. Background technique [0002] At present, acidic and alkaline chemical oxidation processes have been used for the black oxidation of stainless steel cathodes. Due to the acidic chromate method, it needs to be oxidized at a constant temperature of 95°C for about 1 hour. The process conditions are difficult to control, which restricts the application of production. And the solution contains heavy metal chromium, which is a heavy metal pollutant eliminated by the state. In the alkaline chemical oxidation method, the surface of the parts needs to be sandblasted before the pretreatment to ensure that the blackness of the film layer is uniform and does not bloom, and the bath solution is heated to above 100°C to operate, which consumes a lot of energy, and the parts with a large area are oxidized. The appearance of the film is not easy to be uniform, and the pass rate of primary oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
Inventor 冯继红李娜任清刘永超刘书强
Owner 河南平原光电有限公司
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