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Method for acquiring vitrification-silane compound modification layer on surface of steel body and modification liquid

A technology of compound modification and modification liquid, applied in the direction of metal material coating process, etc., can solve the problems of red tide, water pollution, photophobia, etc., and achieve the effect of avoiding eutrophication pollution and use.

Inactive Publication Date: 2017-07-21
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chromate passivation process contains highly carcinogenic Cr 6+ , and the discharge of waste liquid in the phosphate passivation process is likely to cause water pollution, causing red tides, water blooms and other phenomena, while organic materials such as epoxy resin have defects such as photophobia and sun exposure.

Method used

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  • Method for acquiring vitrification-silane compound modification layer on surface of steel body and modification liquid
  • Method for acquiring vitrification-silane compound modification layer on surface of steel body and modification liquid

Examples

Experimental program
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experiment example 1

[0040] Step 1: Pretreatment, firstly polish the steel base, then perform ultrasonic alcohol cleaning, after cleaning, put it into the alkali washing liquid for degreasing treatment, the alkali washing adopts the water bath heating method, the temperature is 60 ℃, and the time is 10 minutes. Then rinse with deionized water and activate with pickling. Blow dry quickly.

[0041] Step 2: Surface modification, the main components and contents of ceramic-silane composite modification liquid are 0.5g / L potassium fluorozirconate, 0.2g / L zinc sulfate, 0.1g / L manganese sulfate, 0.05g / L copper sulfate , 3ml / L OP-10, 80ml / L silane coupling agent pre-hydrolyzate, and adjust the pH of the compound modification solution to 3. The method is as follows: completely immerse the pretreated steel substrate in the vitrification-silane composite modification solution for 30 minutes, take it out, dry and solidify to obtain the vitrification-silane composite modification layer.

experiment example 2

[0043] Step 1: Pretreatment, firstly polish the steel base, then perform ultrasonic alcohol cleaning, after cleaning, put it into the alkali washing liquid for degreasing treatment, the alkali washing adopts the water bath heating method, the temperature is 60 ℃, and the time is 10 minutes. Then rinse with deionized water and activate with pickling. Blow dry quickly.

[0044] Step 2: Surface modification, the main components and contents of ceramic-silane composite modification solution are 2g / L potassium fluorozirconate, 1g / L zinc sulfate, 0.3g / L manganese sulfate, 0.07g / L copper sulfate, 5ml / L OP-10, 90ml / L silane coupling agent pre-hydrolyzed solution, the pH of the composite modified solution was adjusted to 2.5. The method is as follows: completely immerse the pretreated steel substrate in the vitrification-silane composite modification solution for 50 minutes, take it out, dry and solidify to obtain the vitrification-silane composite modification layer.

experiment example 3

[0046] Step 1: Pretreatment, firstly polish the steel base, then perform ultrasonic alcohol cleaning, after cleaning, put it into the alkali washing liquid for degreasing treatment, the alkali washing adopts the water bath heating method, the temperature is 60 ℃, and the time is 10 minutes. Then it was cleaned with deionized water and activated by pickling. Blow dry quickly.

[0047] Step 2: Surface modification, the main components and contents of ceramic-silane composite modification solution are 3g / L potassium fluorozirconate, 2g / L zinc sulfate, 0.4g / L manganese sulfate, 0.1g / L copper sulfate, 7ml / L OP-10, 100ml / L silane coupling agent pre-hydrolyzed solution, the pH of the composite modified solution was adjusted to 4. The method is as follows: completely immerse the pretreated steel substrate in the vitrification-silane composite modification solution for 50 minutes, take it out, dry and solidify to obtain the vitrification-silane composite modification layer.

[0048]...

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Abstract

The invention provides a method for acquiring a vitrification-silane compound modification layer on a surface of a steel body and a modification liquid. The preparation method is carried out according to the following steps that firstly, silane coupling agent pre-hydrolysate subjected to acid environment prehydrolysis treatment is added into the vitrification modification liquid, then, under the room temperature condition, a pre-treated steel base body is immersed for 0.5-1 h in the vitrification liquid, and the compound modification layer containing copper, iron, manganese, zirconium and zinc can be acquired on the surface of the steel. According to the preparation method, the chemical conversion coating technology is adopted, the method is suitable for large complex curved parts, and moreover, use of heavy metal ions, such as Cr<6+> with relatively high toxicity is avoided in the modification liquid; and the method does not have the defect that a phosphate conversion coating technology pollutes water seriously. The modification layer acquired through the method is uniform in appearance and excellent in decay resistance.

Description

technical field [0001] The invention relates to a steel surface modification treatment technology, in particular to a method and a modification liquid for obtaining a ceramic-silane composite modification layer on the surface of a steel body, and belongs to the technical field of surface engineering. Background technique [0002] Steel is a metal material widely used in production and life. However, the loss of steel material due to corrosion is extremely huge. The traditional chromate passivation technology and phosphate passivation technology can provide better corrosion protection for the steel surface, and the organic protection technology has gradually been favored by researchers with the emergence of new materials such as epoxy resin and silane coupling agent. s concern. However, the chromate passivation process contains highly carcinogenic Cr 6+ , and the discharge of waste liquid in the phosphate passivation process is likely to cause water pollution, causing red t...

Claims

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Application Information

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IPC IPC(8): C23C22/34
CPCC23C22/34
Inventor 应丽霞王桂香吴春喜邢天际杨立娟何津萌李泽源
Owner HARBIN ENG UNIV
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