Non-chrome hot galvanizing passivation solution and preparing method thereof

A technology of hot-dip galvanizing and passivation solution, which is applied in the coating process of metal materials, etc., and can solve problems such as difficulty in chromic anhydride and environmental pollution

Inactive Publication Date: 2017-02-15
淄博传能新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic surface treatment agents are hexavalent chromium passivation solution and trivalent chromium passivation solution, but these passivation solutions contain chromic anhydride, because chromic anhydride is a carcinogen, it will cause adverse effects on human health, and chromic anhydride is in The post-processing is difficult and causes environmental pollution. It is a product strictly prohibited by the national environmental protection department. In order to reduce environmental pollution and improve personal health, our company has developed a new type of passivation solution to replace hexavalent chromium and trivalent chromium passivation. Liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 6% titanate, 6% molybdate, 5% tungstate, 10% water-based acrylate, 5% phytic acid, 5% sodium citrate, 8% inorganic acid, and 10% phosphoric acid in sequence by weight , Water 45%. Add water to the components after weighing at room temperature, then add mineral acid, titanate, molybdate, tungstate, water-based acrylate, phytic acid, sodium citrate, phosphoric acid in sequence, stir and dissolve The finished passivation solution can be obtained. The hot-dip galvanized steel sheet is treated with a passivation solution. The thickness of the passivation film is 1.0um, and the salt spray test reaches 75h. The adhesion is tested by the T-bend test. The curved surface is smooth and uncracked, reaching OT.

Embodiment 2

[0017] Weigh 10% titanate, 9% molybdate, 8% tungstate, 16% water-based acrylate, 12% phytic acid, 2% sodium citrate, 4% inorganic acid, and 4% phosphoric acid in sequence by weight , Water 35%. Add water to the components after weighing at room temperature, then add mineral acid, titanate, molybdate, tungstate, water-based acrylate, phytic acid, sodium citrate, phosphoric acid in sequence, stir and dissolve The finished passivation solution can be obtained. The hot-dip galvanized steel sheet is treated with passivation solution, and the passivation film thickness is 1.2um, and the salt spray resistance test reaches 80h. The adhesion is tested by the T-bend test, and the curved surface is smooth and uncracked, reaching OT.

Embodiment 3

[0019] Weigh 8% titanate, 7% molybdate, 7% tungstate, 13% water-based acrylate, 8% phytic acid, 4% sodium citrate, 6% inorganic acid, and 7% phosphoric acid in sequence by weight , Water 40%. Add water to the components after weighing at room temperature, then add mineral acid, titanate, molybdate, tungstate, water-based acrylate, phytic acid, sodium citrate, phosphoric acid in sequence, stir and dissolve The finished passivation solution can be obtained. Treat the hot-dip galvanized steel sheet with a passivation solution. The thickness of the passivation film is 1.5um. The T-bend test shows that the curved surface is smooth and uncracked, reaching OT. The salt spray resistance test reaches 83h. The adhesion is tested by the T-bend test. The curved surface is smooth. Does not crack, reaches OT.

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Abstract

The invention relates to a non-chrome hot galvanizing passivation solution and a preparing method thereof. The solution comprises 6% to 10% of titanate, 6% to 9% of molybdate, 5% to 8% of tungstate, 10% to 16% of water-based acrylate, 5% to 12% of phytic acid, 2% to 5% of sodium citrate, 4% to 8% of mineral acid, 4% to 10% of phosphoric acid and 35% to 45% of water. Compared with the prior art, the solution has the beneficial effects that the solution does not contain chrome, the salt spray test can reach 72 hours, and the passivation effect is good.

Description

technical field [0001] The invention belongs to the field of metal surface treatment, and in particular relates to an anticorrosion method for surface treatment of metal galvanized sheets and a preparation method thereof. Background technique [0002] Galvanized sheet refers to continuous hot-dip galvanized steel sheet for strip steel, and galvanized sheet is a kind of metal zinc (aluminum) coated steel sheet. It is widely used in large public buildings, public workshops, prefabricated houses, steel pipes, automobiles, steel structure workshops, civil and other industries. [0003] At present, the domestic surface treatment agents are hexavalent chromium passivation solution and trivalent chromium passivation solution, but these passivation solutions contain chromic anhydride, because chromic anhydride is a carcinogen, it will cause adverse effects on human health, and chromic anhydride is in The post-processing is difficult and causes environmental pollution. It is a produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/42
CPCC23C22/42
Inventor 王晓琦
Owner 淄博传能新材料科技有限公司
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