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Stainless steel plate surface blackening treatment process

A stainless steel plate and processing technology, applied in the direction of metal material coating process, can solve the problems of complex process and small application range of blackened film, and achieve the effect of strong matrix bonding and uniform thickness

Active Publication Date: 2014-11-05
浙江博海金属制品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Stainless steel is widely used because of its strong corrosion resistance, high strength and exquisite appearance. Blackened stainless steel has extinction and heat absorption and is widely used in decoration, instrumentation, mechanical equipment and other fields. The Chinese patent No. CN101994111A (2011-03-30) uses a combination of two acidification and two oxidation treatments to complete the blackening treatment on the surface of stainless steel. The blackening treatment process is complicated and the blackened film layer is relatively thin. Therefore, the application range of the prepared blackened film is small; in addition, in order to obtain a film layer that is closely combined with the substrate and has uniform film thickness growth, it is necessary to pretreat the stainless steel substrate before the blackening treatment; finally, the blackening treatment also needs to be performed. The final stainless steel plate is sealed to improve the corrosion resistance of the blackened film surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A stainless steel plate surface blackening treatment process. First, the stainless steel plate is polished and polished with 250#, 600#, and 800# metallographic sandpaper in sequence. The stainless steel plate was placed in acetone at a temperature of 10°C for ultrasonic treatment, and the ultrasonic treatment time was 10 minutes; then the stainless steel plate was taken out from the acetone and placed in absolute ethanol at a temperature of 10°C for ultrasonic treatment, and the ultrasonic treatment time was After 10 minutes, the stainless steel plate with mechanical polishing and degreasing treatment was obtained after the treatment; then chemical polishing treatment was carried out, and the chemical polishing treatment was to first immerse the stainless steel plate through mechanical polishing and degreasing treatment in 60g / L NaOH aqueous solution at a temperature of 29°C After soaking for 2 minutes, take it out and then immerse it in concentrated HNO with a volume f...

Embodiment 2

[0032] With embodiment 1, difference is to increase electrochemical polishing treatment between chemical polishing treatment and blackening treatment, is about to carry out blackening treatment after the stainless steel plate of chemical polishing treatment after electrochemical polishing treatment; Described electrochemical polishing treatment is to The chemically polished stainless steel plate was placed at a temperature of 9°C and a current density of 100 mA / cm 2 Electrolyzed in the electrolytic solution for 3 minutes; The electrolytic solution is a mixed solution of an aqueous solution of perchloric acid and absolute ethanol, wherein, the mass fraction of perchloric acid in the aqueous solution of perchloric acid is 60%; the perchloric acid The volume ratio of the aqueous acid solution to the absolute ethanol is 1:4.

Embodiment 3

[0034] With embodiment 1, difference is to increase electrochemical polishing treatment between chemical polishing treatment and blackening treatment, is about to carry out blackening treatment after the stainless steel plate of chemical polishing treatment after electrochemical polishing treatment; Described electrochemical polishing treatment is to The chemically polished stainless steel plate was placed at a temperature of 10°C and a current density of 100 mA / cm 2 Electrolysis in the electrolytic solution for 4 minutes; The electrolytic solution is a mixed solution of an aqueous solution of perchloric acid and absolute ethanol, wherein the mass fraction of perchloric acid in the aqueous solution of perchloric acid is 60%; the perchloric acid The volume ratio of the aqueous acid solution to the absolute ethanol is 1:4.

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Abstract

The invention relates to a stainless steel plate surface treatment process, in particular to a stainless steel plate surface blackening treatment process, and belongs to metal surface treatment processes. The stainless steel plate surface blackening treatment process comprises the following steps of (1) mechanical polishing and oil removing treatment; (2) chemical polishing treatment; (3) blackening agent preparation treatment, wherein a blackening agent is aqueous solution consisting of CrO3, KMnO4, H3BO3 and NH4NO3; (4) blackening treatment: putting the blackening agent into a blackening tank and heating the blackening agent to 45-55 DEG C, soaking a stainless steel plate after the chemical polishing treatment into the blackening tank for 9-11 minutes, and taking out the stainless steel plate to obtain the blackened stainless steel plate; and (5) hole sealing treatment. A blackened film formed on the stainless steel plate surface after blackening treatment has the advantages of uniform thickness, strong corrosion resistance and strong binding force with the stainless steel plate.

Description

technical field [0001] The invention relates to a stainless steel plate surface treatment process, mainly relates to a stainless steel plate surface blackening treatment process, which belongs to the metal surface treatment process. Background technique [0002] Stainless steel is widely used because of its strong corrosion resistance, high strength and exquisite appearance. Blackened stainless steel has extinction and heat absorption and is widely used in decoration, instrumentation, mechanical equipment and other fields. The Chinese patent No. CN101994111A (2011-03-30) uses a combination of two acidification and two oxidation treatments to complete the blackening treatment on the surface of stainless steel. The blackening treatment process is complicated and the blackened film layer is relatively thin. Therefore, the application range of the prepared blackened film is small; in addition, in order to obtain a film layer that is closely combined with the substrate and has un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/24C23C22/78
Inventor 韩永全
Owner 浙江博海金属制品科技有限公司