Technique for coloring copper red on tool steel component by chemical method
A chemical method and technology of steel parts, applied in the direction of metal material coating process, etc., can solve the problems of strong corrosion, serious environmental pollution of waste liquid, slow development, etc., and achieve mild process operating conditions, simple and easy process, and waste liquid The effect of small emissions
CN101078115AInactive Publication Date: 2007-11-28HEBEI UNIV OF TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- HEBEI UNIV OF TECH
- Publication Date
- 2007-11-28
- Estimated Expiration
- Not applicable · inactive patent
Abstract
The invention relates to color the copper red. The process is: first to pre-treat; second to color the copper. The color liquid is made up of: CuSO4 2-8g/L, EDTA-2Na 0.5-1.1g/L, seignette salt 0.1-0.5g/L, ammonium molybdate 0.2-0.9g/L and sodium sulfite 1-2g/L; the pre-treated steel piece is dipped into the color liquid and the temperature is room temperature, the time is 1-5.5min; thirdly to back treat and get the product. The invention has the mild condition and the color liquid has no corrosion to steel and cost little. The treating area of the color liquid can reach 1.1m2/L and has little waste liquid discharge.
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Claims
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