Novel stainless steel acid-washing passivation liquid

A technology of pickling passivation and stainless steel, applied in the coating process of metal materials, etc., can solve the problems of strong irritating smell, easy to burn human skin and osteoporosis, unfavorable environmental protection and health, and achieve simple and economical use The effect of reducing the cost of pollution control and reducing the cost of pollution control

Active Publication Date: 2012-09-05
王福平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The current stainless steel pickling passivation solution has a strong pungent smell, accompanied by yellow smoke, and is easy to burn human skin and osteoporosis, which is not conducive to environmental protection and health

Method used

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  • Novel stainless steel acid-washing passivation liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A stainless steel pickling passivation solution, its components include: inorganic acid, penetrating agent, oxidizing agent and corrosion inhibitor; their mass ratio is 20:15:15:50.

[0034] The inorganic acid uses hydrochloric acid and nitric acid with a mass ratio of 2:1, wherein the concentration of hydrochloric acid is 30% and the concentration of nitric acid is 98% during preparation. The penetrant is commercially available penetrant M. Both the oxidizing agent and the corrosion inhibitor are commercially available products.

[0035] Mix the above-mentioned inorganic acid, penetrant, oxidant and corrosion inhibitor, stir evenly, and then use it.

Embodiment 2

[0037] A stainless steel pickling passivation solution, its components include: inorganic acid, penetrating agent, oxidizing agent and corrosion inhibitor; their mass ratio is 50:8:12:30.

[0038] The inorganic acid uses potassium pyrophosphate and hydrochloric acid with a mass ratio of 0.8:1, wherein the concentration of hydrochloric acid is 30% during preparation, and potassium pyrophosphate is solid. The penetrant is commercially available penetrant JFC. Both the oxidizing agent and the corrosion inhibitor are commercially available products.

[0039] Mix the above-mentioned inorganic acid, penetrant, oxidant and corrosion inhibitor, stir evenly, and then use it.

Embodiment 3

[0041] A stainless steel pickling passivation solution, its components include: inorganic acid, penetrating agent, oxidizing agent and corrosion inhibitor; their mass ratio is 30-40:10-15:10-15:30-40.

[0042] The mineral acid uses potassium pyrophosphate, sulfuric acid and hydrochloric acid with a mass ratio of 1:1:1, wherein the concentration of sulfuric acid is 98%, the concentration of hydrochloric acid is 30%, and potassium pyrophosphate is solid during preparation. The penetrant is commercially available penetrant M. Both the oxidizing agent and the corrosion inhibitor are commercially available products.

[0043] Mix the inorganic acid, penetrant, oxidizing agent and corrosion inhibitor in the above ratio, stir evenly, and then use it.

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PUM

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Abstract

The invention relates to a novel stainless steel acid-washing passivation liquid which comprises inorganic acid, penetrant, oxidant and corrosion inhibitor. The stainless steel acid-washing passivation liquid does not generate violent pungent odor or yellow acid mist in the application process, thereby avoiding hurting the skin, reducing the air pollution and lowering the cost. The stainless steel acid-washing passivation liquid is easy to use: the stainless steel acid-washing passivation liquid is poured into a tank, and soaks the stainless steel at normal temperature without heating; and the washing speed is about 50% higher than those of the acid-washing passivation liquid (paste) in the existing market and the acid-washing passivation liquid containing nitric acid and hydrofluoric acid, and the washing quantity is as 3.2 times or so as the like products in the market. The novel stainless steel acid-washing passivation liquid can complete oil removal, derusting, descaling and acid-washing passivation at one time. The residual liquid after use can be treated by a conventional treatment method, and can also be used for treating dyeing waste water; and the treated dyeing waste water is clear and transparent and achieves the reclamation standard. Thus, the stainless steel acid-washing passivation liquid has the advantages of environment protection and water resource saving, and can recycle water.

Description

technical field [0001] The invention relates to the technical field of pickling passivation, in particular to a novel stainless steel pickling passivation solution. Background technique [0002] During the processing of stainless steel, it will cause surface defects, hidden dangers of corrosion, black scale and other metal compounds, yellow welds and grease during cold drawing, etc. In order to improve the appearance and corrosion resistance of stainless steel, the processed stainless steel must be acidified Wash passivation treatment. Make the treated surface form a passivation film with chromium as the main substance, prevent it from reacting with other substances, achieve the purpose of passivation, make it bright and white, improve the surface anti-corrosion quality of stainless steel products, and prolong the service life of equipment. Stainless steel pickling is generally treated with pickling passivation paste and pickling passivation solution. [0003] At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/04C23C22/06
Inventor 王福平
Owner 王福平
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