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Water-base neutrality steel chromium-free strong passivator

A passivating agent, neutral technology, applied in the direction of metal material coating process, etc., can solve the problem of undiscovered film-forming and self-repairing ability, unable to completely maintain the original appearance of the workpiece, and the workpiece is not suitable for use, reaching the price Low cost, low cost, good anti-corrosion effect

Inactive Publication Date: 2007-10-24
合肥华清高科表面技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: it can usually be detected visually or by touch, and the original appearance of the workpiece cannot be completely maintained; the cost is extremely high; the workpiece that requires secondary processing is not suitable for use, otherwise it will face the problem of removing the resin film; fire prevention Poor performance; often traces of organic solvent contamination
[0020] In the process of looking for a substitute for chromate, no inorganic or organic substance has been found to have similar film-forming and self-healing capabilities to chromic acid

Method used

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  • Water-base neutrality steel chromium-free strong passivator
  • Water-base neutrality steel chromium-free strong passivator

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Weigh 40g of triphenylcyclic imidazoline quaternary ammonium salt and 200g of sodium molybdate respectively, put them into a 2400g water container and mix evenly until they are completely dissolved to make semi-finished products for later use. Weigh 6330g of water, put it into a container and heat it to 40°C, then add 500g of sodium ferric acetate diethylenediamine di-o-hydroxyphenyl macroacetate, 30g of light rare earth lanthanum (La), 200g of phytic acid ester, and 300g of hydroxylamine sulfate (HAS) It is sufficient to stir without particles, and 10kg of water-based neutral steel chromium-free strong passivator can be obtained.

example 2

[0054] Take by weighing 50g of triphenylcyclic imidazoline quaternary ammonium salt and 250g of ammonium molybdate, put them into a 3000g water container and mix evenly until they are completely dissolved to make semi-finished products for later use. Weigh 4990g of water, put it into a container and heat it to 40°C, add 1000g of ethylenediamine di-o-hydroxyphenyl macroacetate sodium ferric acetate, 60g of light rare earth cerium (Ce), 250g of phytic acid ester, and 400g of hydroxylamine sulfate (HAS) It is sufficient to stir without particles, and 10kg of water-based neutral steel chromium-free strong passivator can be obtained.

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Abstract

The invention discloses a strong non-chromine passivator of water-based neutral steel and iron, which is composed of macromolecular chelant, light rare earth, trityl cycloglyoxalidine quaternaries, phytic acid and HAS. These raw materials are blended to make intoxic and non-harmful passivator, which passives the dip-coated and sprayed steel and iron.

Description

technical field [0001] The invention relates to a water-based neutral iron and steel chromium-free strong passivator with a polymer chelating agent as the main component. Background technique [0002] Corrosion of steel materials occurs all the time. According to statistics, about 10% of steel products cannot be recycled each year due to corrosion. In order to prevent corrosion and reduce the huge losses caused by corrosion of steel materials, various anti-corrosion methods must be adopted. One of the methods is to treat the steel surface to improve its corrosion resistance, and the traditional steel surface treatment method There is a problem that the use of harmful substances causes a large environmental load. The methods currently used mainly include phosphating method, oil-based anti-rust agent, water-based anti-rust, water-based resin varnish, water-based resin paint, water-based corrosion-inhibiting anti-rust, passivation and other methods. [0003] After phosphatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/05
Inventor 刘万青
Owner 合肥华清高科表面技术股份有限公司
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