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Steel and iron surface passivating treatment liquid

A passivation treatment, steel surface technology, applied in the direction of metal material coating process, etc., can solve the problems of affecting metal corrosion resistance, affecting passivation effect, and non-smooth protective film, achieving low cost, excellent corrosion resistance, High stability effect

Active Publication Date: 2017-02-22
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also technology to add potassium fluorosilicate and cerium nitrate in the passivation treatment solution. For example, the patent application number 201410650819.2 discloses a surface treatment solution for tin-plated steel sheets and a preparation method thereof. The treatment solution consists of disodium hydrogen phosphate, coke Sodium phosphate, ammonium fluorotitanate, potassium fluorosilicate, nickel nitrate, etc.; the patent application number 200910265418.4 discloses a high-temperature-resistant metal passivator, which contains cerous carbonate dihydrate, cerium nitrate, etc.; The protective film formed by the chemical solution on the metal surface is not smooth, has large pores, poor compactness, and is easy to fall off, which affects its passivation effect, and then affects the corrosion resistance of the metal

Method used

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  • Steel and iron surface passivating treatment liquid
  • Steel and iron surface passivating treatment liquid
  • Steel and iron surface passivating treatment liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1. A steel surface passivation treatment solution containing the following components: 6.3% hydrofluoric acid, 1.8% potassium fluorosilicate, 1.6% cerium nitrate, 0.5% peracetic acid, H 2 o 2 1.0%, sodium benzoate 2.3%, lauryl dimethyl ammonium chloride 0.01%, hexamethylenetetramine 0.002%, and the rest is water, and the pH of the treatment solution is adjusted to be 4 with hydrochloric acid.

[0035] The preparation method of the steel surface passivation treatment solution is as follows: weighing the components in the formula by weight, mixing, stirring evenly, and adjusting the treatment solution to pH=4 with hydrochloric acid.

Embodiment 2

[0037] A steel surface passivation treatment solution, containing the following components: 1% hydrofluoric acid, 0.1% sodium fluorosilicate, 0.1% cerous nitrate, 0.1% sodium peroxide, 5% sodium benzoate, tetradecyl dimethyl Ammonium chloride 0.5%, hexamethylenetetramine 0.005%, and the rest is water, and the pH of the treatment solution is adjusted to 2 with hydrochloric acid.

[0038] Its preparation method is the same as in Example 1, and the pH of the treatment solution is adjusted to 2 with hydrochloric acid.

Embodiment 3

[0040] A steel surface passivation treatment solution, containing the following components: 15% hydrofluoric acid, 5% magnesium fluorosilicate, 5% cerium trichloride, 5% ammonium persulfate, 0.1% sodium benzoate, dodecyl dimethyl Ammonium chloride 0.001%, hexamethylenetetramine 0.001%, the rest is water, and the pH of the treatment solution is adjusted to 5 with hydrochloric acid.

[0041] Its preparation method is the same as in Example 1, and the pH of the treatment solution is adjusted to 5 with hydrochloric acid.

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Abstract

The invention discloses steel and iron surface passivating treatment liquid which contains 1-15% of hydrofluoric acid, 0.1-5% of fluosilicate, 0.1-5% of cerate, 0.1-5% of oxidants, 0.1-5% of sodium benzoate, 0.001-0.5% of dimeric surfactants, 0.001-0.005% of hexamethylenetetramine and the balance of water. Hydrochloric acid is utilized to adjust pH of the treatment liquid to 2-5, the oxidants are at least one of H2O2, sodium peroxide, ammonium persulfate and peracetic acid, and the dimeric surfactants are at least one of dodecyl dimethyl ammonium chloride and myristyl dimethyl ammonium chloride. Coatings formed on the surfaces of steel and iron are smooth, compact and high in stability, generated passivation films are excellent in corrosion resistance, and the treatment liquid is nontoxic, easy to degrade and capable of lowering environment pollution and is an environment-friendly treatment agent.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a steel surface passivation treatment solution. Background technique [0002] The output of steel is huge and its application is very wide. There are steel products in every corner of life. However, steel structures are easily corroded in humid atmospheres and polluted environments. The direct loss caused by steel corrosion is mainly manifested in the waste of steel resources and the loss of repeated manufacturing due to corrosion. The indirect losses caused by steel corrosion are mainly manifested in the shutdown of factories, low efficiency and environmental pollution caused by corrosion. The two most commonly used steel anti-corrosion treatment techniques in steel corrosion protection are chromate passivation treatment and phosphating treatment on the steel surface. [0003] Although, chromate conversion coating has the advantages of dense struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/34
CPCC23C22/34
Inventor 王晓晖张颖任海晶刘世川李俊莉刘彦锋
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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