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Method for preparing hot galvanizing chrome-free passivant in batches

A chromium-free passivator and hot-dip galvanizing technology, which is applied in the coating process of metal materials, etc., can solve problems such as environmental damage and high toxicity, and achieve broad application prospects and good passivation effects

Inactive Publication Date: 2015-09-16
CHANGSHU FENGFAN POWER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the passivation solution containing chromate contains a large amount of hexavalent chromium. Hexavalent chromium is a highly toxic and carcinogenic substance. The waste water and aerosol generated during the purification process are particularly serious for organisms and the environment. harm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of batch hot-dip galvanizing chromium-free passivating agent, comprises the following steps:

[0019] Step 1, in parts by weight, 3 parts of aminopropyltrimethoxysilane, 2 parts of lactic acid, 1 part of nitric acid solution, 4 parts of sodium molybdate, 5 parts of absolute ethanol, 2 parts of titanyl sulfate, 1 part of tannic acid 8 parts and 8 parts of deionized water were added to the stirring tank, and mixed to obtain mixture A;

[0020] Step 2, in parts by weight, put the mixture A obtained in step 1 into a ball milling tank, add 0.8 parts of phenyltriethoxysilane and 1 part of hydroxyethylene diphosphonic acid, and use alumina ceramic balls as the ball milling medium Ball milling to obtain mixture B;

[0021] Step 3, in parts by weight, 2 parts of sodium hexametaphosphate, 1 part of polyurethane, 3 parts of hydroxyethylene diphosphonic acid, 1 part of ethyl orthosilicate, 2 parts of calcium silicate and deionized water Add 3 parts to...

Embodiment 2

[0026] A kind of preparation method of batch hot-dip galvanizing chromium-free passivating agent, comprises the following steps:

[0027] Step 1, in parts by weight, 5 parts of aminopropyltrimethoxysilane, 4 parts of lactic acid, 2 parts of nitric acid solution, 7 parts of sodium molybdate, 8 parts of absolute ethanol, 3 parts of titanyl sulfate, 6 parts of tannic acid 12 parts and 12 parts of deionized water were added to the stirring tank and mixed to obtain mixture A;

[0028] Step 2, in parts by weight, put the mixture A obtained in step 1 into a ball milling tank, add 1.4 parts of phenyltriethoxysilane and 2 parts of hydroxyethylene diphosphonic acid, and use alumina ceramic balls as the ball milling medium Ball milling to obtain mixture B;

[0029] Step 3, in parts by weight, 5 parts of sodium hexametaphosphate, 2 parts of polyurethane, 4 parts of hydroxyethylene diphosphonic acid, 3 parts of ethyl orthosilicate, 5 parts of calcium silicate and deionized water 6 parts ...

Embodiment 3

[0034] A kind of preparation method of batch hot-dip galvanizing chromium-free passivating agent, comprises the following steps:

[0035] Step 1, in parts by weight, 7 parts of aminopropyltrimethoxysilane, 6 parts of lactic acid, 5 parts of nitric acid solution, 8 parts of sodium molybdate, 9 parts of absolute ethanol, 5 parts of titanyl sulfate, 7 parts of tannic acid 15 parts and 15 parts of deionized water were added to the stirring tank and mixed to obtain mixture A;

[0036] Step 2, in parts by weight, put the mixture A obtained in step 1 into a ball milling tank, add 2.5 parts of phenyltriethoxysilane and 3 parts of hydroxyethylene diphosphonic acid, and use alumina ceramic balls as the ball milling medium Ball milling to obtain mixture B;

[0037] Step 3, in parts by weight, 7 parts of sodium hexametaphosphate, 5 parts of polyurethane, 6 parts of hydroxyethylene diphosphonic acid, 4 parts of ethyl orthosilicate, 6 parts of calcium silicate and deionized water Add 9 pa...

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PUM

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Abstract

The invention discloses a method for preparing hot galvanizing chrome-free passivant in batches, which comprises the steps of adding aminopropyl trimethoxy silane, lactic acid, nitric acid solution, sodium molybdate, absolute ethyl alcohol, titanyl sulfate, tannin and deionized water into a stirred vessel, stirring, then putting a mixture obtained into a ball-milling pot, adding triethoxyphenylsilane and HEDP, taking an alumina ceramics ball as a ball-milling medium to carry out ball-milling, then adding sodium hexametaphosphate, polyurethane, the HEDP, ethyl orthosilicate, calcium silicate and the deionized water into the mixture obtained via ball-milling, using a cutting emulsifying machine to stir, filtering, and obtaining the hot galvanizing chrome-free passivant. The passivant obtained by the method has a better passivating effect, does not contain heavy metal chromium that has greater harm to the environment and human health, and thus has a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of steel plates, and in particular relates to a preparation method of a chromium-free passivator for hot-dip galvanizing in batches. Background technique [0002] Metal materials have been widely used in all aspects of social production and life for a long time. In order to improve its performance, improve the surface quality of metal materials and prolong its service life, it is generally necessary to carry out appropriate surface treatment. The cost of galvanizing treatment is low, it has good corrosion resistance, paintability, plasticity and weldability, and is durable, and the coating has strong initial properties. It is widely used in construction and automobile manufacturing, household appliances and steel. Anti-corrosion treatment. In addition, in the fields of transportation and metallurgy, construction and machinery, electric power and aviation, galvanized layer passivation h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/42
Inventor 赵月华顾小蕾尤为
Owner CHANGSHU FENGFAN POWER EQUIP
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