Novel environment-friendly chromium-free passivator and preparation method thereof

A chromium-free passivation agent and environmentally friendly technology, applied in the coating process of metal materials, etc., can solve the problems of easy corrosion, red rust and loss of anti-corrosion effect of the galvanized layer, and achieve excellent adhesion, low environmental pollution, and easy effect of operation

Active Publication Date: 2019-01-25
CHONGQING GUANGREN TOWER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Electro-galvanizing and hot-dip galvanizing are effective ways to improve the corrosion resistance of the surface of steel materials. They are widely used in all aspects of life at present, but in humid environments, especially in hot and humid environments, the galvanized layer is prone to corrosion, making the coating A dark gray or white loose corrosion product - white rust is formed on the surface, and red rust will appear after a long time, thus losing the anti-corrosion effect; Passivate the coating to form a dense passivation film on the surface of the coating, improve the corrosion resistance of the coating, and increase the service life of the workpiece
[0003] Most of t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example one

[0016] The new environmentally friendly chromium-free passivator provided in this embodiment includes the following raw material components in parts by weight: 32 parts of water-based acrylic resin, 18 parts of laponite, 3.5 parts of citric acid, 11 parts of phytic acid, and 8 parts of zinc chloride. Parts, 4 parts of ethylene glycol phenyl ether, 10 parts of glycine, 3.5 parts of sodium molybdate, 10 parts of polyaspartic acid, 5 parts of oxidized starch, 6 parts of sodium citrate, 3.5 parts of amine oxide, and 53 parts of deionized water.

[0017] The method for preparing the new environmentally friendly chromium-free passivation agent provided in this embodiment includes the following steps:

[0018] (1) After mixing 1 / 2 volume of deionized water with water-based acrylic resin, glycine, polyaspartic acid, oxidized starch and laponite, heat to 60°C and stir at 900rpm for 85min to prepare a mixture Ⅰ;

[0019] (2) After mixing the remaining deionized water with ...

Example Embodiment

[0023] Example two

[0024] The new environmentally friendly chromium-free passivator provided in this embodiment includes the following raw material components in parts by weight: 30 parts of aqueous acrylic resin, 20 parts of laponite, 3.5 parts of citric acid, 12 parts of phytic acid, and 7 parts of zinc chloride. Parts, 5 parts of ethylene glycol phenyl ether, 8 parts of glycine, 4 parts of sodium molybdate, 8 parts of polyaspartic acid, 6 parts of oxidized starch, 4 parts of sodium citrate, 3.5 parts of amine oxide, 50 parts of deionized water.

[0025] The method for preparing the new environmentally friendly chromium-free passivation agent provided in this embodiment includes the following steps:

[0026] (1) Take 1 / 2 volume of deionized water and mix it with water-based acrylic resin, glycine, polyaspartic acid, oxidized starch and laponite, heat it to 60°C, stir at 800rpm for 90min to prepare a mixture Ⅰ;

[0027] (2) After mixing the remaining deionized water with citric ac...

Example Embodiment

[0031] Example three

[0032] The new environmentally friendly chromium-free passivator provided in this embodiment includes the following raw material components in parts by weight: 30 parts of aqueous acrylic resin, 15 parts of laponite, 3.5 parts of citric acid, 10 parts of phytic acid, and 7 parts of zinc chloride. Parts, 3 parts of ethylene glycol phenyl ether, 8 parts of glycine, 3.5 parts of sodium molybdate, 8 parts of polyaspartic acid, 4 parts of oxidized starch, 4 parts of sodium citrate, 3 parts of amine oxide, 50 parts of deionized water.

[0033] The method for preparing the new environmentally friendly chromium-free passivation agent provided in this embodiment includes the following steps:

[0034] (1) Take 1 / 2 volume of deionized water and mix it with water-based acrylic resin, glycine, polyaspartic acid, oxidized starch and laponite, heat it to 55°C and stir at 800rpm for 80min to prepare a mixture Ⅰ;

[0035] (2) After mixing the remaining deionized water with citr...

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PUM

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Abstract

The invention provides a novel environment-friendly chromium-free passivator. The passivator comprises, by weight, 30-35 parts of water-based acrylic resin, 15-20 parts of laponite, 3.5-4 parts of citric acid, 10-12 parts of phytic acid, 7-8 parts of zinc chloride, 3-5 parts of ethylene glycol phenyl ether, 8-12 parts of glycine, 3.5-4 parts of sodium molybdate, 8-12 parts of polyaspartic acid, 4-6 parts of oxidized starch, 4-7 parts of sodium citrate, 3-3.5 parts of amine oxide and 50-55 parts of deionized water. The passivator can form a dense protective film on the surface of a plated part,the formed protective film has excellent adhesion and can be closely attached to the surface of the plated part, and thus the corrosion resistance and wear resistance of the plated part are greatly improved.

Description

technical field [0001] The invention relates to the technical field of post-treatment of material surfaces, in particular to a novel environment-friendly chromium-free passivator. Background technique [0002] Electro-galvanizing and hot-dip galvanizing are effective ways to improve the corrosion resistance of the surface of steel materials. They are widely used in all aspects of life at present, but in humid environments, especially in hot and humid environments, the galvanized layer is prone to corrosion, making the coating A dark gray or white loose corrosion product - white rust is formed on the surface, and red rust will appear after a long time, thus losing the anti-corrosion effect; Passivation treatment is carried out on the coating to form a dense passivation film on the surface of the coating, improve the corrosion resistance of the coating, and increase the service life of the workpiece. [0003] The traditional galvanizing process mostly adopts the solution with...

Claims

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Application Information

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IPC IPC(8): C23C22/40
CPCC23C22/40
Inventor 洪伟洪敏张胜利潘武平杨杰
Owner CHONGQING GUANGREN TOWER MFG
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