Non-chromium electrolytic polishing solution for stainless steel and surface polishing process for stainless steel

A technology of electrolytic polishing and treatment process, which is applied in the direction of electrolytic process and electrolytic components, etc. It can solve the problems of restricting the rapid formation of mucous film on the surface of the workpiece, restricting the promotion of stainless steel polishing process, and increasing the cost of process use, so as to shorten the polishing time and reduce the polishing cost , The effect of reducing the process cost

Active Publication Date: 2011-11-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional stainless steel electrolytic polishing solutions usually use chromic anhydride and phosphoric acid as etchant. Although chromic anhydride enhances the polishing effect, it is highly toxic and corrosive, and the waste liquid pollutes the environment. Phosphoric acid is expensive, and a large amount of use improves the process. The

Method used

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  • Non-chromium electrolytic polishing solution for stainless steel and surface polishing process for stainless steel
  • Non-chromium electrolytic polishing solution for stainless steel and surface polishing process for stainless steel
  • Non-chromium electrolytic polishing solution for stainless steel and surface polishing process for stainless steel

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Embodiment 1

[0044] This embodiment illustrates the stainless steel chromium-free electrolytic polishing solution and stainless steel surface treatment process provided by the present invention.

[0045] (a) Degreasing treatment:

[0046] 200ml concentration is that the acetone of analytical grade is added in the beaker of 1000ml, then the stainless steel sample that size is 50 * 30 * 2mm is placed in above-mentioned solution and cleans 15 minutes with ultrasonic vibration at 50 ℃.

[0047] (b) Ultrasonic vibration washing:

[0048] The above stainless steel workpiece was placed in a 1000ml beaker filled with 200ml deionized water, and cleaned by ultrasonic vibration at 88°C for 3 minutes.

[0049] (c) Ultrasonic vibration pickling:

[0050] In a 1000ml beaker filled with 150ml of deionized water, add 5ml of concentrated hydrochloric acid with a mass fraction of 38% to prepare an acid solution, place the workpiece in it, and clean it with ultrasonic vibration at 39°C for 6 minutes.

[0...

Embodiment 2

[0065] This embodiment illustrates the stainless steel chromium-free electrolytic polishing solution and stainless steel surface treatment process provided by the present invention.

[0066] (a) Degreasing treatment:

[0067] Add 180ml of analytically pure ethanol and 20ml of analytically pure acetone into a 1000ml beaker, then place a stainless steel sample with a size of 60×45×2mm in the above solution and clean it with ultrasonic vibration for 28 minutes at 6°C .

[0068] (b) Ultrasonic vibration washing:

[0069] The above stainless steel workpiece was placed in a 1000ml beaker filled with 350ml deionized water, and cleaned by ultrasonic vibration at 45°C for 18 minutes.

[0070] (c) Ultrasonic vibration pickling:

[0071] In a 1000ml beaker filled with 180ml of deionized water, add 15ml of concentrated sulfuric acid with a mass fraction of 98% and 12ml of concentrated hydrochloric acid with a mass fraction of 38% to prepare an acid solution, place the workpiece in it, ...

Embodiment 3

[0086] This embodiment illustrates the stainless steel chromium-free electrolytic polishing solution and stainless steel surface treatment process provided by the present invention.

[0087] (a) Degreasing treatment:

[0088] Add an appropriate amount of detergent into a 1000ml beaker, and then place a stainless steel sample with a size of 50×40×2mm in the above solution and clean it with ultrasonic vibration for 2 minutes at 90°C.

[0089] (b) Ultrasonic vibration washing:

[0090] The above stainless steel workpiece was placed in a 1000ml beaker filled with 300ml deionized water, and cleaned by ultrasonic vibration at 9°C for 27 minutes.

[0091] (c) Ultrasonic vibration pickling:

[0092] In a 1000ml beaker filled with 100ml of deionized water, add 10ml of concentrated hydrochloric acid with a mass fraction of 36% to prepare an acid solution, place the workpiece in it, and clean it with ultrasonic vibration at 85°C for 2 minutes.

[0093] (d) Ultrasonic vibration alkali ...

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Abstract

The invention discloses a non-chromium electrolytic polishing solution for stainless steel and a surface polishing process for stainless steel. The polishing solution mainly comprises alcohol (at least one selected from the group consisting of methanol and ethanol) and acid (at least one selected from the group consisting of sulfuric acid and acetic acid). The surface polishing process for stainless steel provided in the invention comprises the following steps: removal of oil stains, rinsing with ultrasonic vibration, pickling with ultrasonic vibration, alkali washing with ultrasonic vibration, electropolishing, rinsing with ultrasonic vibration, passivation, cleaning and drying. Compared to conventional electrolytic polishing solutions for stainless steel, the polishing solution provided in the invention contains no chromic anhydride, which enables environmental pollution to be reduced and waste liquid to be easy to treat, being an environment-friendly type polishing solution; the polishing solution further contains no expensive phosphoric acid, which enables polishing cost to be reduced and is favorable for the popularization of the electropolishing process for stainless steel. According to results of tests, the polishing solution and the process provided in the invention can effectively remove oxide films and scratches on the surface of stainless steel, enable a workpiece to have an effect of mirror brightness, and effectively enhance the quality of polishing.

Description

technical field [0001] The invention relates to a stainless steel chromium-free electrolytic polishing liquid and a stainless steel surface polishing process. Background technique [0002] Due to its excellent performance of atmospheric corrosion resistance, stainless steel is widely used in construction, chemical industry, instrumentation, and aerospace industries. However, it will form a layer of oxide skin after being placed on the surface for a long time after thermal processing and mechanical processing, so it needs to be treated in an appropriate way. Among many methods, the polishing process has been greatly popularized and applied as a very mature process. . [0003] Stainless steel polishing can be divided into three processes: mechanical polishing, chemical polishing and electrolytic polishing. The mechanical polishing process needs to use high-temperature pickling equipment and consumes a lot of power, so the cost is relatively high. The cost of chemical polish...

Claims

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Application Information

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IPC IPC(8): C25F3/24C25F7/00
Inventor 赖延清陈志伟张坤刘芳洋赵联波贾明李劼刘业翔
Owner CENT SOUTH UNIV
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