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GO-doped environment-friendly passivator, and preparation method and application thereof

A passivation agent and environmental protection technology, applied in the direction of metal material coating process, etc., can solve the problems of large environmental pollution of passivation agent, low corrosion resistance and oxidation resistance of passive film on stainless steel surface, etc., and achieves simple and convenient versatility, Easy to maintain and easy to operate

Inactive Publication Date: 2018-06-26
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The environment-friendly passivating agent of the present invention can generate a corrosion-resistant and oxidation-resistant passivation film on the surface of stainless steel; big problem of environmental pollution

Method used

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  • GO-doped environment-friendly passivator, and preparation method and application thereof
  • GO-doped environment-friendly passivator, and preparation method and application thereof
  • GO-doped environment-friendly passivator, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A new type of environmentally friendly passivator doped with GO, which consists of the following components per liter of passivator:

[0037]

[0038] Weigh or measure sodium lauryl sulfate, citric acid, hydrogen peroxide, cerium nitrate, triethanolamine, and graphene oxide respectively according to the weight ratio and volume ratio, and add them to deionized water to dissolve in order to obtain a new environmentally friendly Deactivator.

Embodiment 2

[0040] The passivating agent that embodiment 1 gained is applied to stainless steel surface and forms passivation film, specifically comprises the steps:

[0041] (1) Stainless steel pretreatment, first clean the stainless steel workpiece with deionized water, then polish and decontaminate it with sandpaper, then ultrasonically clean it in ethanol solution, then clean it in hydrochloric acid solution to remove the surface oxide film, and finally rinse it with deionized water .

[0042] (2) First heat the prepared passivating agent to 50°C, put the stainless steel workpiece pretreated in step 1 into the passivating agent, passivate for 25 minutes, and dry the sample after completion, that is, form Passivation film sample A that does not contain high-priced chromium, is environmentally friendly, and has excellent corrosion and oxidation resistance. Through the test, the corrosion current density is 1.502×10 –5 cm 2 , the mass gain after oxidation at 170℃ for 10h is 2.94mg / cm ...

Embodiment 3

[0044] A new type of environmentally friendly passivator doped with GO, which consists of the following components per liter of passivator:

[0045]

[0046]

[0047] Weigh or measure sodium lauryl sulfate, citric acid, hydrogen peroxide, cerium nitrate, triethanolamine, and graphene oxide respectively according to the weight ratio and volume ratio, and add them to deionized water to dissolve in order to obtain a new environmentally friendly Deactivator.

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PUM

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Abstract

The invention disclosed a GO-doped environment-friendly passivator, and a preparation method and application of the GO-doped environment-friendly passivator. The GO-doped environment-friendly passivator per liter comprises 10-80 ml of citric acid, 20-80 ml of hydrogen peroxide, 2-5 g of cerous nitrate, 0.01-0.1 g of lauryl sodium sulfate, 0.1-0.5 ml of triethanolamine, 1-5 g of graphene oxide, andthe balance deionized water. The environment-friendly passivator does not contain chromic acid. A passive film with good corrosion resistance, oxidation resistance and stability can be formed on thestainless steel surface by adding a stainless steel workpiece into the passivator of 50-70 DEG C for passivating treatment for 20-50 minutes.

Description

technical field [0001] The invention relates to the technical field of surface passivation, in particular to an environmentally friendly passivator doped with GO, a preparation method and an application thereof. Background technique [0002] As a material widely used in modern industry, stainless steel has a history of more than one hundred years. Stainless steel has many advantages such as high strength, connectability, corrosion resistance and convenient mechanical processing. It has extremely important applications in the fields of aerospace, chemical industry, instrument materials, medicine and energy and other industrial and architectural decoration fields. However, when there are aggressive anions (such as Cl － ), stainless steel will undergo pitting corrosion, and this will lead to very serious other forms of corrosion. Accidental corrosion failure accidents of stainless steel will cause serious economic losses, environmental pollution, personal casualties and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/05
Inventor 蒋继波陈浩天成汉文朱丽莹孙瑶馨蔺华琳
Owner SHANGHAI INST OF TECH
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