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Surface treating agent for medium-aluminum zinc-aluminum-magnesium coated steel plate and manufacturing method thereof

A surface treatment agent, a technology for coating steel plates, applied in the direction of metal material coating process, etc., can solve the problems of weak anti-oxidation ability, instability, affecting the product's resistance to blackening, etc.

Active Publication Date: 2021-02-23
立邦(上海)化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The zinc-aluminum-magnesium coating contains more magnesium elements. Magnesium is easy to react with oxidizing gases such as oxygen, water vapor, and carbon dioxide in the air to form a thick magnesium-containing compound layer. This magnesium-containing compound layer belongs to the oxide of magnesium. Or / and the mixture of hydroxide or / and basic carbonate, which is unstable in the early stage of formation and appears gray-black, which seriously affects the appearance quality of the coating
[0006] At present, the surface treatment agents for medium-aluminum-zinc-aluminum-magnesium-coated steel sheets used on hot-dip galvanized coatings (GI), hot-dip galvanized iron coatings (GA), electro-galvanized coatings (EG) and galvanized coatings (GL) are relatively mature. However, due to the weak oxidation resistance of these surface treatment agents, they cannot be used on zinc-aluminum-magnesium-coated steel sheets, which will significantly affect the blackening resistance of the product

Method used

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  • Surface treating agent for medium-aluminum zinc-aluminum-magnesium coated steel plate and manufacturing method thereof
  • Surface treating agent for medium-aluminum zinc-aluminum-magnesium coated steel plate and manufacturing method thereof
  • Surface treating agent for medium-aluminum zinc-aluminum-magnesium coated steel plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] At room temperature, add deionized water into the reaction kettle, add water-based polyurethane resin while stirring, and stir for 30 minutes; then add titanate coupling agent while stirring, and stir for 30 minutes; then add silane coupling agent while stirring, and stir 60min; add magnesium oxide while stirring, stir for 45min; add water-based hindered phenolic antioxidant, stir for 15min; water-based epoxy ether polymer, stir for 30min; water-based oxidized polyethylene wax, stir for 30min.

Embodiment 2

[0049]At room temperature, add deionized water into the reaction kettle, add water-based polyurethane resin while stirring, and stir for 30 minutes; then add titanate coupling agent while stirring, and stir for 30 minutes; then add silane coupling agent while stirring, and stir 60min; add magnesium oxide while stirring, stir for 45min; add water-based hindered phenolic antioxidant, stir for 30min; water-based epoxy ether polymer, stir for 15min; water-based oxidized polyethylene wax, stir for 15min.

Embodiment 3

[0051] At room temperature, add deionized water into the reaction kettle, add water-based polyurethane resin while stirring, and stir for 30 minutes; then add titanate coupling agent while stirring, and stir for 30 minutes; then add silane coupling agent while stirring, and stir 60min; add magnesium oxide while stirring, stir for 30min; add water-based hindered phenolic antioxidant, stir for 15min; water-based epoxy ether polymer, stir for 15min; water-based oxidized polyethylene wax, stir for 30min.

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Abstract

The invention discloses a surface treating agent for a medium-aluminum zinc-aluminum-magnesium coated steel plate and a manufacturing method thereof. The surface treating agent for the medium-aluminumzinc-aluminum-magnesium coated steel plate comprises the following components in parts by weight of 30-45 parts of waterborne polyurethane resin, 1.5-3.0 parts of a coupling agent of organic titanate, 0.5-1.5 parts of a silane coupling agent, 0.2-0.3 part of magnesium oxide, 0.8-1.2 parts of a water-based hindered phenol antioxidant, 0.6-0.9 part of water-based epoxy ether polymer, 1.0-2.0 partsof water-based oxidized polyethlene wax and 50-65 parts of deionized water.

Description

technical field [0001] The invention relates to a metal plate surface treatment agent, in particular to a surface treatment agent for a medium-aluminum-zinc-aluminum-magnesium coated steel plate and a preparation method thereof. Background technique [0002] With the development of steel materials and coating technology, people put forward higher requirements for the corrosion resistance of coated steel, and the traditional hot-dip galvanized (pure zinc coated) steel can no longer meet the application requirements. Highly corrosion-resistant 55% Al-Zn, Zn-5% Al and zinc-aluminum-magnesium (Zn-Al-Mg) coatings have become the focus of the development of coating materials. In particular, the Zn-Al-Mg coating has the characteristics of high corrosion resistance and port corrosion protection, and has become the best choice for coated steel sheets. [0003] Zinc-aluminum-magnesium-coated steel plate has super corrosion resistance, wear resistance, coating resistance and good weld...

Claims

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Application Information

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IPC IPC(8): C23C22/68
CPCC23C22/68
Inventor 黄高峰张丽华余泽强朱海燕曹庆华萧继业
Owner 立邦(上海)化工有限公司
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