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Stainless steel passivation agent and preparation method thereof

A passivating agent, stainless steel technology, applied in the direction of metal material coating process, etc., can solve the problems of unfavorable sustainable development, environmental pollution, etc., to achieve the effect of protection from corrosion and prolonging service life

Inactive Publication Date: 2020-09-25
ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This system uses expensive rare earth metal salts as passivating agents and fluozirconic acid as film-forming aids. Although the salt spray test time has been extended, the chromium-free passivating agent still needs to be replaced once a month. Cause environmental pollution, which is not conducive to sustainable development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A stainless steel passivator, consisting of the following components:

[0021] Citric Acid 10%

[0022] Phytic Acid 5%

[0023] Dicumyl peroxide 2%

[0024] Waterborne Acrylic Polysiloxane 3%

[0025] Tetrasodium iminodisuccinate 0.3%

[0026] The balance is deionized water

[0027] A stainless steel passivator is prepared by the following method: according to the above ratio, citric acid, phytic acid, dicumyl peroxide, tetrasodium iminodisuccinate and water-based acrylic polysiloxane are added to deionized In water, heat up to 50°C and stir for 20 minutes to form a passivating agent.

[0028] The stainless steel workpiece was cleaned with deionized water, polished and decontaminated with sandpaper, then ultrasonically cleaned in ethanol solution, then cleaned in hydrochloric acid solution to remove the surface oxide film, and finally rinsed with deionized water. First heat the prepared passivating agent to 50°C, put the pretreated stainless steel workpiece into t...

Embodiment 2

[0030] A stainless steel passivator, consisting of the following components:

[0031] Citric Acid 12%

[0032] Phytic Acid 6%

[0033] Dicumyl peroxide 3%

[0034] Waterborne Acrylic Polysiloxane 5%

[0035] Sodium iminodisuccinate 0.4%

[0036] The balance is deionized water

[0037] A stainless steel passivator is prepared by the following method:

[0038] According to the above ratio, add citric acid, phytic acid, dicumyl peroxide, tetrasodium iminodisuccinate and aqueous acrylic polysiloxane into deionized water, raise the temperature to 50°C, and stir for 20 minutes to form passivation agent.

[0039] The stainless steel workpiece was cleaned with deionized water, polished and decontaminated with sandpaper, then ultrasonically cleaned in ethanol solution, then cleaned in hydrochloric acid solution to remove the surface oxide film, and finally rinsed with deionized water. First heat the prepared passivating agent to 50°C, put the pretreated stainless steel workpiece...

Embodiment 3

[0041] A stainless steel passivator, consisting of the following components:

[0042] Citric Acid 14%

[0043] Phytic Acid 8%

[0044] Dicumyl peroxide 4%

[0045] Waterborne Acrylic Polysiloxane 6%

[0046] Tetrasodium iminodisuccinate 0.5%

[0047] The balance is deionized water

[0048] A stainless steel passivator is prepared by the following method:

[0049] According to the above ratio, add citric acid, phytic acid, dicumyl peroxide, tetrasodium iminodisuccinate and aqueous acrylic polysiloxane into deionized water, raise the temperature to 50°C, and stir for 20 minutes to form passivation agent.

[0050] The stainless steel workpiece was cleaned with deionized water, polished and decontaminated with sandpaper, then ultrasonically cleaned in ethanol solution, then cleaned in hydrochloric acid solution to remove the surface oxide film, and finally rinsed with deionized water. First heat the prepared passivating agent to 50°C, put the pretreated stainless steel work...

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PUM

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Abstract

The invention provides a stainless steel passivation agent. The stainless steel passivation agent is prepared from the following components in mass by percentage: 5%-30% of citric acid, 5%-20% of phytic acid, 1%-10% of dicumyl peroxide, 1%-20% of silicone, 0.3%-0.6% of tetrasodium iminodisuccinate and the balance of deionized water. A preparation method of the stainless steel passivation agent comprises the following steps that the citric acid, the phytic acid, the dicumyl peroxide, the tetrasodium iminodisuccinate and water-based acrylic polysiloxane are added to the deionized water accordingto the ratio, the mixture is heated up to 50 DEG C and stirred for 20min to form the passivation agent. The stainless steel passivation agent forms a dense protective film on the surface of the stainless steel, and the service life of a stainless steel workpiece is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of stainless steel surface passivation treatment, and in particular relates to a stainless steel passivator, a preparation method and an application thereof. Background technique [0002] Passivation is a method to transform the metal surface into a state that is not easily oxidized, thereby delaying the corrosion rate of the metal. The passivation of stainless steel is to form a very thin, dense, good coverage passivation film (oxide film) on the metal surface that can be firmly attached to the metal surface; this film exists as an independent phase, Usually a compound of oxygen and metal. [0003] In the traditional stainless steel passivation process, the chromium-acid system is generally used to passivate stainless steel. However, due to the increasingly stringent environmental protection, the chromium-acid system has been gradually eliminated. At present, the fluorozirconate system or Fluorotitanate s...

Claims

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Application Information

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IPC IPC(8): C23C22/50
CPCC23C22/50C23C2222/20
Inventor 付国爱
Owner ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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