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Stainless steel matte finishing process

A treatment process, stainless steel technology, applied in the field of stainless steel matt treatment process, can solve the problems of toxic substances, low dissolution rate of environmental protection solution, low dissolution rate of stainless steel, etc., achieve good erosion effect, increase hardness, and fast dissolution rate

Active Publication Date: 2018-11-30
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of this, the present invention provides a stainless steel matt treatment process in order to solve the problem of low dissolution rate of stainless steel caused by choosing an environmentally friendly matte treatment solution containing neutral or weak acid instead of a strong acid etchant in the prior art to treat stainless steel , the treatment of stainless steel through this treatment process can not only solve the environmental protection problem that the current stainless steel matt treatment solution contains toxic substances and strong acids, but also solve the problem of low dissolution rate of the environmental protection solution, and provide a new way for the development of stainless steel matt treatment

Method used

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Examples

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Effect test

Embodiment 1

[0032] A 304 stainless steel matt treatment process, comprising the following process steps:

[0033] (1), pre-processing:

[0034] A. Soak the 304 stainless steel workpiece in an alkaline solution at 70°C for 5 minutes to remove the oil on the surface of the 304 stainless steel workpiece. The alkaline solution is 64g / L NaOH, 20g / LNa 2CO 3 , 10g / L Na 2 SiO 3 and 50g / L Na 3 PO 4 One or more of them, the pH value of the alkaline solution is 9;

[0035] B. Place the 304 stainless steel workpiece after degreasing and decontamination in ultrasonic deionized water for 10 minutes, so that the dirt on the surface of the 304 stainless steel workpiece is thoroughly cleaned;

[0036] C, place the 304 stainless steel workpiece after ultrasonic treatment in absolute ethanol for 10 seconds and then dry it;

[0037] (2), matt anodizing treatment:

[0038] D. Connect the pre-treated 304 stainless steel workpiece to the positive pole of the power supply and place it in a container cont...

Embodiment 2

[0057] A 316L stainless steel matt treatment process, comprising the following process steps:

[0058] (1), pre-processing:

[0059] A. Soak the 316L stainless steel workpiece in an alkaline solution at 70°C for 5 minutes to remove the oil on the surface of the 316L stainless steel workpiece. The alkaline solution is 64g / LNaOH, 20g / LNa 2 CO 3 , 10g / LNa 2 SiO 3 and 50g / LNa 3 PO 4 One or more of them, the pH value of the alkaline solution is 8;

[0060] B. Place the 316L stainless steel workpiece after degreasing and decontamination in ultrasonic deionized water for 10 minutes, so that the dirt on the surface of the 316L stainless steel workpiece is completely cleaned;

[0061] C. Place the 316L stainless steel workpiece after ultrasonic treatment in absolute ethanol for 10 seconds and then dry it;

[0062] (2), matt anodizing treatment:

[0063] D. Connect the pre-treated 316L stainless steel workpiece to the positive pole of the power supply and place it in a container...

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Abstract

The invention belongs to the technical field of surface treatment of medical equipment and relates to a stainless steel matte finishing process. The primary technical scheme is as follows: the stainless steel matte finishing process comprises the following steps: placing a deoiled stainless steel workpiece and the anode of a power supply connected in an anodizing matte finishing solution of a mixture containing 10-50 g / L H3PO4, 10-30 g / L C6H8O7, 100-300 g / L H2O2 and 0.4-1 g / L K2SO4; heating the solution to 60-80 DEG C and connecting a platinum and titanium net to the cathode of a direct current power supply, wherein the area ratio of the platinum and titanium net and the cathode of the direct current power supply is 1: 1; and keeping the distance between the cathode and the anode at 6.0 cm, carrying out anodizing for 30-60 min under the condition that the current density is 3.4-6.8 A / dm<2> and the working voltage is 9.4-10.5 V, wherein the surface of stainless steel workpiece is matteand has silver metal gloss, the hardness of the stainless steel is improved, and the pitting corrosion resistance is improved. The stainless steel matte finishing process provided by the invention notonly can solve the environmental problem that an existing stainless steel matte finishing solution contains harmful substances and strong acids, but also can solve the problem that the dissolving speed of the environment-friendly solution is low, thereby providing a new path for development of stainless steel matte technical treatment.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of medical equipment, and relates to a stainless steel matt treatment process. Background technique [0002] Due to the advantages of strong corrosion resistance and low cost, austenitic stainless steel is widely used in the medical equipment industry. In this industry, stainless steel equipment is required to be processed into matt to avoid light pollution caused by reflections of indoor lights. At present, matte treatment technology is often used to process stainless steel into a matte surface with a uniform silver-white metallic luster. Most enterprises choose mechanical methods (such as wire drawing, sandblasting, rolling, etc.) and chemical grinding techniques to process stainless steel. [0003] The invention patent with the application number CN201710991265.6 discloses a production method of stainless steel with a low reflective surface. The patent produces stainless steel with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
CPCC25D11/34
Inventor 邓洪达高翔曹献龙严永博侯晓发
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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