Stainless steel acid pickling passivation paste and preparing method thereof

An acid pickling passivation, stainless steel technology, applied in the direction of metal material coating process, can solve the problems of easy burns to human skin and osteoporosis, unfavorable environmental protection and physical health, stainless steel surface damage, etc. Good pickling effect and the effect of reducing corrosion rate

Inactive Publication Date: 2017-07-04
合肥协耀玻璃制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the stainless steel pickling passivation paste/liquid has the following main problems: 1) The current stainless steel pickling passivation paste/liquid has a strong pungent smell, accompanied by yellow smoke, and is easy to burn human skin and osteoporosis, etc. , which is not conducive to environmental protection and health; 2) The current pickling passivation paste/liquid products use a large number of strong acid raw materials such as hydrofluoric acid, nitric acid, sulfuric acid and sodium alkylbenzene sulfonate and are ri

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0032] 1. Ingredients

[0033] A stainless steel pickling passivation paste, comprising the following ingredients in parts by weight: 4 parts of nitrous acid, 2 parts of phosphoric acid, 1 part of oxalic acid, 11 parts of alkyl alcohol polyoxyethylene ether, 8 parts of sodium citrate, acetic anhydride 7 parts, 3 parts of potassium pyrophosphate, 6 parts of disodium hydrogen phosphate, 9 parts of benzotriazole, 5 parts of glycerin, 10 parts of gelling agent, 6 parts of corrosion inhibitor, 8 parts of penetrating agent, thickener 10 parts, viscosity modifier 12 parts and inorganic filler 20 parts.

[0034] Wherein, the gelling agent is a mixture of polyethyleneimine, polycarboxyethylene and carmellose in equal amounts.

[0035] Wherein, the corrosion inhibitor is a mixture of sodium molybdate, sodium borate, triethanolamine, and p-thiocresol, and the mass ratio between them is 1:1:2:2.

[0036] Wherein, the penetrating agent is a mixture of fatty alcohol and ethylenediamine EO...

Embodiment 2

[0048] 1. Ingredients

[0049] A stainless steel pickling passivation paste, comprising the following ingredients in parts by weight: 5 parts of nitrous acid, 3 parts of phosphoric acid, 2 parts of oxalic acid, 13 parts of alkyl alcohol polyoxyethylene ether, 10 parts of sodium citrate, acetic anhydride 8 parts, 4 parts of potassium pyrophosphate, 7 parts of disodium hydrogen phosphate, 11 parts of benzotriazole, 7 parts of glycerol, 15 parts of gelling agent, 7 parts of corrosion inhibitor, 9 parts of penetrating agent, thickener 15 parts, viscosity modifier 14 parts and inorganic filler 25 parts.

[0050] Wherein, the gelling agent is a mixture of polycarboxyethylene and carmellose in equal amounts.

[0051] Wherein, the corrosion inhibitor is a mixture of sodium molybdate, sodium metasilicate and p-thiocresol, and the mass ratio between them is 1:1:2.

[0052] Wherein, the penetrating agent is a mixture of fatty alcohol polyoxyethylene ether and ethylenediamine EO-PO in e...

Embodiment 3

[0064] 1. Ingredients

[0065] A stainless steel pickling passivation paste, comprising the following ingredients in parts by weight: 6 parts of nitrous acid, 4 parts of phosphoric acid, 3 parts of oxalic acid, 15 parts of alkyl alcohol polyoxyethylene ether, 12 parts of sodium citrate, acetic anhydride 9 parts, 5 parts of potassium pyrophosphate, 8 parts of disodium hydrogen phosphate, 13 parts of benzotriazole, 9 parts of glycerol, 20 parts of gelling agent, 8 parts of corrosion inhibitor, 10 parts of penetrating agent, thickener 20 parts, 16 parts of viscosity modifier and 30 parts of inorganic filler.

[0066] Wherein, the gelling agent is carmellose.

[0067] Wherein, the corrosion inhibitor is a mixture of sodium borate, triethanolamine and p-thiocresol in equal amounts.

[0068] Wherein, the penetrating agent is fatty alcohol polyoxyethylene ether.

[0069] Wherein, the fatty alcohol is isohexyl alcohol.

[0070] Wherein, the thickener is a mixture of magnesium stea...

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PUM

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Abstract

The invention discloses stainless steel acid pickling passivation paste and a preparing method thereof. The stainless steel acid pickling passivation paste comprises the ingredients including nitrous acid, phosphoric acid, oxalic acid, alkyl alcohol polyoxyethylene ether, sodium citrate, acetic anhydride, potassium pyrophosphate, disodium hydrogen phosphate, benzotriazole, glycerol, gel, a corrosion inhibitor, a penetrating agent, a thickening agent, a viscosity modifier and an inorganic filler. Parts of raw materials like the acetic anhydride are firstly added into the phosphoric acid to be mixed to obtain mixed liquor I; then parts of raw materials like glycerol are sequentially added into mixed acid liquor of the nitrous acid and the oxalic acid to be mixed to obtain mixed liquor II; the mixed liquor I and the mixed liquor II are mixed, and the inorganic filler is added into a mixture; and finally the penetrating agent, the corrosion inhibitor, the thickening agent, the viscosity modifier and the gel are sequentially added while stirring is carried out, and the finished product is obtained after even stirring is carried out. The stainless steel acid pickling passivation paste is good in passivation effect, damage to the stainless steel surface is not prone to occurrence, the stainless steel acid pickling passivation paste is environment-friendly and simple in preparation, and harms on human bodies and damage to the environment can be avoided.

Description

technical field [0001] The invention relates to the technical field of passivating agents, in particular to a stainless steel pickling passivation paste and a preparation method thereof. Background technique [0002] During the processing of stainless steel, it will cause surface defects, hidden dangers of corrosion, black scale and other metal compounds, yellow welds and grease during cold drawing, etc. In order to improve the appearance and corrosion resistance of stainless steel, the processed stainless steel must be acidified Wash passivation treatment. Make the treated surface form a passivation film with chromium as the main substance, prevent it from reacting with other substances, achieve the purpose of passivation, make it bright and white, improve the surface anti-corrosion quality of stainless steel products, and prolong the service life of equipment. Stainless steel pickling is generally treated with pickling passivation paste and pickling passivation solution. ...

Claims

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Application Information

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IPC IPC(8): C23G1/08C23C22/47
CPCC23G1/088C23C22/47
Inventor 魏芳芳
Owner 合肥协耀玻璃制品有限公司
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