Austenitic stainless steel cleaning and passivating agent

A technology of austenitic stainless steel and passivating agent, which is applied in the coating process of metal materials, etc., can solve the problems of high safety hazards of strong oxidants, unfavorable physical and mental health of workers, and harsh operating conditions, and achieves excellent complexing ability and is not easy to Ineffectiveness and strong derusting ability

Inactive Publication Date: 2019-03-19
安徽笃舜智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, strong oxidants have high potential safety hazards, and the operating conditions are harsh, and this treatment method has a strong pungent smell
Not only is it not conducive to the physical and mental health of workers, but also has a destructive effect on the environment
[0011] The degreasing, derusting and passivation of stainless steel equipment or products in the prior art are generally carried out separately, which not only increases the production cost, reduces labor productivity, but also increases the occupancy rate of the workshop

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 A cleaning passivator for austenitic stainless steel, which is made up of the following raw materials in mass percentage: 30% citric acid, 0.1% disodium edetate, 1% hydroxy ethylidene diphosphoric acid (HEDP), 3% glycolic acid, 3% phosphoric acid, 2% sodium polyacrylate, 0.1% non-ionic surfactant, 0.5% 322H, 0.5% sodium dodecylbenzenesulfonate, 0.1% yttrium nitrate, 0.1% corrosion inhibitor, etc. Measure water.

[0021] The corrosion inhibitor is preferably one or more of benzotriazole, thiourea, and hexamethylenetetramine.

[0022] The nonionic surfactant is fatty alcohol polyoxyethylene ether.

[0023] After 4 hours of treatment at room temperature, the blue point test result after passivation treatment is qualified.

Embodiment 2

[0024] Embodiment 2 A kind of austenitic stainless steel cleaning passivation agent, it is made up of the raw material of following mass percentage: citric acid 40%, disodium edetate 1%, hydroxyethylidene diphosphoric acid (HEDP) 5%, Glycolic acid 8%, phosphoric acid 8%, sodium polyacrylate 4%, non-ionic surfactant 2%, 322H 3%, sodium dodecylbenzene sulfonate 1%, yttrium nitrate 0.5%, corrosion inhibitor 1%, residual Measure water.

[0025] The corrosion inhibitor is preferably one or more of benzotriazole, sodium polyacrylate thiourea, and hexamethylenetetramine.

[0026] The nonionic surfactant is fatty alcohol polyoxyethylene ether.

[0027] Treated at 45°C for 2 hours, the blue point test result after passivation treatment was qualified.

Embodiment 3

[0028] Embodiment 3 A cleaning passivator for austenitic stainless steel, which is made up of the following raw materials in mass percentage: 35% citric acid, 0.6% disodium edetate, 3% hydroxy ethylidene diphosphoric acid (HEDP), Glycolic acid 5%, phosphoric acid 6%, sodium polyacrylate 6%, non-ionic surfactant 1.2%, 322H 2%, sodium dodecylbenzenesulfonate 0.8%, yttrium nitrate 0.3%, corrosion inhibitor 0.6%, residual Measure water.

[0029] The corrosion inhibitor is preferably one or more of benzotriazole, thiourea, and hexamethylenetetramine.

[0030] The nonionic surfactant is fatty alcohol polyoxyethylene ether.

[0031] Treated at 40°C for 2.5 hours, the blue point test result was qualified after passivation treatment.

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PUM

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Abstract

The invention discloses an austenitic stainless steel cleaning and passivating agent. The austenitic stainless steel cleaning and passivating agent is composed of, by mass, 30%-40% of citric acid, 0.1%-1% of ethylene diamine tetraacetic acid disodium, 1%-5% of 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP), 3%-8% of glycollic acid, 3%-8% of phosphoric acid, 0.1%-2% of a non-ionic surface activeagent, 0.5%-3% of 322H, 0.5%-1% of sodium dodecylbenzenesulfonate, 0%-0.5% of yttrium nitrate, 0.1%-1% of corrosion inhibitor and the balance water. The prepared degreasing, rust removing and passivating agent has the characteristics of being environment-friendly, free of pungent smell and free of toxicity, harm to people and the environment can be remarkably reduced, and the production cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of stainless steel surface treatment, in particular to an austenitic stainless steel cleaning passivation agent. Background technique [0002] Austenitic stainless steel has excellent corrosion resistance, high temperature resistance, low temperature resistance and other characteristics. It has a wide range of uses and is one of the important steel materials for the development of various sectors of the national economy. Austenitic stainless steel has been widely used in aerospace, atomic energy, ocean development, petrochemical, food processing, medical and health, household appliances, kitchen utensils and other industries. The corrosion resistance of stainless steel products mainly depends on the quality of the passivation film formed on its surface. If the passivation film is incomplete or defective, the corrosion resistance of stainless steel products will be reduced. In engineering, stainless steel pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C23G1/06C23C22/50
CPCC23C22/50C23G1/06C23G1/088
Inventor 黄志荣岳彩民许梦醒
Owner 安徽笃舜智能装备有限公司
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