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Soft magnetic stainless steel electrochemical polishing solution and method

A soft magnetic stainless steel, electrochemical technology, applied in the field of electrochemical polishing of stainless steel materials, can solve the problems of dull and dull surface, uniform point-like white spots, unsatisfactory effect, etc., to solve the dull and dull surface, improve the application field, Beautifully polished effect

Active Publication Date: 2012-04-11
BEIJING SEVENSTAR ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, traditional electrochemical polishing solutions and methods are used to polish soft magnetic stainless steel, and there are always many quality problems, such as dull and dull surface, inconsistent color, linear over-corrosion and uniform spot-like white spots, etc., the effect always not ideal

Method used

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  • Soft magnetic stainless steel electrochemical polishing solution and method
  • Soft magnetic stainless steel electrochemical polishing solution and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The polishing solution used in this embodiment is: phosphoric acid: 850g / l, sulfuric acid: 330g / l, chromium trioxide: 8g / l, sodium phosphate: 32g / l; citric acid: 81g / l; Triton X-100: 4ml / l; the rest is water, add copper sulfate to adjust the specific gravity of the solution to 1.42, and the solution temperature is 85°C.

[0029] In this embodiment, the adjustment voltage is 8V, and the current is 11.8A / dm 2 , for 1.5 min of electrochemical polishing. Before polishing, the surface of the part is the natural color of metal without a sense of brightness. After polishing, the surface is bright and the color is uniform. By measuring the surface roughness, it is 0.46 before polishing and 0.23 after polishing.

Embodiment 2

[0031] The polishing solution used in this embodiment is: phosphoric acid: 980g / l, sulfuric acid: 350g / l, chromium trioxide: 9g / l, sodium phosphate: 50g / l; citric acid: 100g / l; Triton X-100: 3ml / l; the rest is water, add copper sulfate to adjust the specific gravity of the solution to 1.65, and the solution temperature is 91°C.

[0032] In this embodiment, the adjustment voltage is 11V, and the current is 22A / dm 2 , perform electrochemical polishing for 3 min. Before polishing, the surface of the part is the natural color of metal, without luster and grayish. After polishing, the surface is bright and the color is uniform and beautiful like a mirror surface. By measuring the surface roughness, it is 0.21 before polishing and 0.08 after polishing.

Embodiment 3

[0034] The polishing solution used in this embodiment is: phosphoric acid: 930g / l, sulfuric acid: 290g / l, chromium trioxide: 10g / l, sodium phosphate: 45g / l; citric acid: 90g / l; Triton X-100: 5ml / l; the rest is water, add copper sulfate to adjust the specific gravity of the solution to 1.51, and the solution temperature to 95°C.

[0035] In this embodiment, the adjustment voltage is 14V, and the current is 31.8A / dm 2 , perform electrochemical polishing for 1 min. Before polishing, the surface of the part is the natural color of metal, without a sense of brightness and grayish. After polishing, the surface is bright and the color is uniform. Through the measurement of surface roughness, it is 0.31 before polishing and 0.17 after polishing.

[0036] As can be seen from the above examples, the embodiment of the present invention realizes the electrochemical polishing of the soft magnetic stainless steel surface well by rationally designing the solution composition, proportion an...

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Abstract

The invention discloses a soft magnetic stainless steel electrochemical polishing solution and method. The solution comprises the following components in parts by weight: 820-1000 parts of phosphoric acid, 280-360 parts of sulfuric acid, 8-10 parts of dichromium trioxide, 30-50 parts of sodium phosphate, 80-100 parts of citric acid, 2-5 parts of Triton X-100, 0-270 parts of copper sulfate and 125-300 parts of water. The solution is stable and easy to operate, and has a wide parameter range and long use period. By reasonably designing component and ratio of the electrochemical polishing solution and electrochemical polishing process parameters, electrochemical polishing of the surface of soft magnetic stainless steel is well realized, the polishing effect is obviously superior to that of a traditional polishing method, and according to the surface condition of the soft magnetic stainless steel before polishing, the polishing effect can maximally achieve a mirror effect.

Description

technical field [0001] The invention relates to an electrochemical polishing technology for stainless steel materials, in particular to a solution and method for electrochemical polishing of soft magnetic stainless steel. Background technique [0002] Soft magnetic stainless steel refers to ferromagnetic stainless steel with small residual magnetism and coercive force. It is characterized by easy magnetization and easy demagnetization. It is widely used in electrical and electronic industrial equipment in industrial production. According to the environment and occasion of use, it generally needs to be polished. In addition to many special-purpose requirements, smoothness and beauty are also an important aspect. Common polishing methods include mechanical polishing and electrochemical polishing. Mechanical polishing is labor-intensive and often only solves the problem of smoothness and beauty. It is a physical process and cannot solve some special purposes such as the contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/24
Inventor 方刚祝恒阳
Owner BEIJING SEVENSTAR ELECTRONICS CO LTD