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Electrochemical coloring solution for stainless steel and coloring method

A stainless steel and coloring liquid technology, applied in anodizing and other directions, can solve the problems of uneven color on the surface of the workpiece, uneven current density distribution on the surface of the workpiece, etc., to improve the stability of the color film, reliability and high control accuracy, Simple effect of coloring process

Inactive Publication Date: 2014-06-18
WUXI BAOSHUN STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This electrolytic coloring solution can only color relatively simple workpieces. If the shape of the workpiece is complex, it will be due to the uneven distribution of current density on the surface of the workpiece (the current density of the raised part is higher, which is called a high position, and the current density of the concave part is smaller. , called the low position), resulting in uneven color on the surface of the colored workpiece

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment one: a kind of stainless steel electrochemical coloring liquid, comprises following components: molybdate 30g / L, sulfuric acid 10g / L, zinc sulfate 2g / L, manganese sulfate 0.5g / L, sodium nitrate 10g / L, propanediol Sodium acid 0.1g / L, the solvent is water.

[0016] The coloring method of the stainless steel electrochemical coloring liquid is characterized in that the following method is adopted:

[0017] (1) Workpiece degreasing: Use metal degreaser to remove oil stains on the surface of stainless steel workpieces, and then clean them with hot water at 70°C;

[0018] (2) Polishing: mechanical polishing or electrolytic polishing of stainless steel workpieces;

[0019] (3) Cleaning: Clean with hot water at 70°C;

[0020] (4) Coloring: Put the stainless steel workpiece in the electrolytic tank filled with coloring solution, the stainless steel workpiece is the anode, the lead plate is the cathode, the coloring voltage is 1.5V, and the coloring current is 0.1A / dm...

Embodiment 2

[0022] Embodiment two: a kind of stainless steel electrochemical coloring liquid, comprises following component: molybdate 80g / L, sulfuric acid 18g / L, zinc sulfate 5g / L, manganese sulfate 5g / L, sodium nitrate 20g / L, malonic acid Sodium 10g / L, solvent is water.

[0023] The coloring method of the stainless steel electrochemical coloring liquid is characterized in that the following method is adopted:

[0024] (1) Workpiece degreasing: Use metal degreaser to remove oil stains on the surface of stainless steel workpieces, and then clean them with 90°C hot water;

[0025] (2) Polishing: mechanical polishing or electrolytic polishing of stainless steel workpieces;

[0026] (3) Cleaning: Clean with 90°C hot water;

[0027] (4) Coloring: Put the stainless steel workpiece in the electrolytic tank filled with coloring solution, the stainless steel workpiece is the anode, the lead plate is the cathode, the coloring voltage is 2.5V, and the coloring current is 20A / dm 2 , the coloring ...

Embodiment 3

[0029] Embodiment three: a kind of stainless steel electrochemical coloring liquid, comprises following component: molybdate 50g / L, sulfuric acid 15g / L, zinc sulfate 3g / L, manganese sulfate 2g / L, sodium nitrate 15g / L, malonic acid Sodium 5g / L, solvent is water.

[0030] The coloring method of the stainless steel electrochemical coloring liquid is characterized in that the following method is adopted:

[0031] (1) Workpiece degreasing: Use metal degreaser to remove oil stains on the surface of stainless steel workpieces, and then clean them with 80°C hot water;

[0032] (2) Polishing: mechanical polishing or electrolytic polishing of stainless steel workpieces;

[0033] (3) Cleaning: Clean with 80°C hot water;

[0034] (4) Coloring: Put the stainless steel workpiece in the electrolytic tank filled with coloring solution, the stainless steel workpiece is the anode, the lead plate is the cathode, the coloring voltage is 2V, and the coloring current is 10A / dm 2 , the coloring t...

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Abstract

The present invention relates to an electrochemical coloring solution for stainless steel and coloring method, which is characterized in that the electrochemical coloring solution for stainless steel comprises the following components of 30-80g / L of molybdate, 10-18g / L sulfuric acid,2-5g / L of zinc sulfate, 0.5-5g / L of manganese sulfate, 10-20g / L of sodium nitrate, 0.1-10g / L of sodium malonate and solvent being water. The coloring method comprises (1) removing greasy dirt on the surface of the stainless steel by metal detergent, and then cleaning with hot water; (2) mechanically or electrolytically polishing stainless steel workpieces; (3) then cleaning with hot water; (4) coloring: placing stainless steel workpieces in the electrolytic bath filled with coloring solution, wherein stainless steel workpieces and lead plate are respectively taken as an anode and a cathode, the coloring voltage is 1.5-2.5V, the coloring current is 0.1-20A / dm<2> and the coloring time is 1-15 minutes; (5) washing and drying to obtain the finished product. The coloring solution and coloring method according to the invention can be used for producing high-quality stainless steel products which can meet the performance requirements and consistent color tones.

Description

technical field [0001] The invention relates to a stainless steel electrochemical coloring solution and a coloring method. Background technique [0002] Stainless steel has excellent corrosion resistance and wear resistance and wide use, and has been recognized and loved by the majority of people. With the improvement of people's living standards, stainless steel products continue to develop into decorative aspects, so the color requirements for stainless steel surfaces are also constantly increasing. [0003] Coloring stainless steel is to form color on the surface of stainless steel, thus becoming colored stainless steel. The industrialized production of colored stainless steel originated from the INCO company in the UK in 1973. The INCO method is to infiltrate the stainless steel workpiece into a mixed solution containing high concentration of chromic acid and sulfuric acid at 80°C. Transparent chromium oxide film. Due to the effect of this film, the reflected light wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
Inventor 余建林
Owner WUXI BAOSHUN STAINLESS STEEL
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