A kind of magnesium alloy corrosion-resistant coating and its application

A technology for magnesium alloys and coatings, applied in anti-corrosion coatings, metal material coating processes, coatings, etc., can solve the problems of not being able to solve the requirements for corrosion resistance and performance of magnesium alloys, affecting the scope of application of magnesium alloys, etc. The effect of simple and feasible preparation process, strong repeatability, high hardness and corrosion resistance

Inactive Publication Date: 2017-02-22
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Although there have been preliminary studies on the anti-corrosion coatings on the surface of magnesium alloys, they can not solve the anti-corrosion and performance requirements of magnesium alloys well, and affect the application range of magnesium alloys.

Method used

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  • A kind of magnesium alloy corrosion-resistant coating and its application
  • A kind of magnesium alloy corrosion-resistant coating and its application
  • A kind of magnesium alloy corrosion-resistant coating and its application

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Embodiment 1

[0039] The present embodiment magnesium alloy anticorrosion coating is made of zinc powder, aluminum powder, zirconia, yttrium oxide, yttrium nitrate, polyethylene glycol, sodium molybdate, hydroxymethyl cellulose, silane coupling agent KH-560, diphenyl Dimethoxysilane and deionized water are uniformly mixed, wherein the mass percentage of zinc powder is 18%, the mass percentage of aluminum powder is 5%, the mass percentage of zirconia is 8%, and the mass percentage of yttrium oxide is 0.7%. , the mass percentage of yttrium nitrate is 3%, the mass percentage of polyethylene glycol is 16%, the mass percentage of sodium molybdate is 5%, the mass percentage of hydroxymethyl cellulose is 0.8%, the silane coupling agent KH-560 The mass percent of diphenyldimethoxysilane is 3%, the mass percent of diphenyldimethoxysilane is 4%, and the balance is deionized water; the zinc powder and aluminum powder are circular flake powders, and the sheet diameter of the zinc powder is 10-20 μm and...

Embodiment 2

[0054] The present embodiment magnesium alloy anticorrosion coating is made of zinc powder, aluminum powder, zirconia, yttrium oxide, yttrium nitrate, polyethylene glycol, sodium molybdate, hydroxymethyl cellulose, silane coupling agent KH-560, diphenyl Dimethoxysilane and deionized water are uniformly mixed, wherein the mass percentage of zinc powder is 16%, the mass percentage of aluminum powder is 4%, the mass percentage of zirconia is 5%, and the mass percentage of yttrium oxide is 0.8%. , the mass percentage of yttrium nitrate is 4%, the mass percentage of polyethylene glycol is 15%, the mass percentage of sodium molybdate is 3%, the mass percentage of hydroxymethyl cellulose is 0.6%, the silane coupling agent KH-560 The mass percent of diphenyldimethoxysilane is 5%, the mass percent of diphenyldimethoxysilane is 3%, and the balance is deionized water; the zinc powder and aluminum powder are circular flake powders, and the sheet diameter of the zinc powder is 10-20 μm and...

Embodiment 3

[0066] The present embodiment magnesium alloy anticorrosion coating is made of zinc powder, aluminum powder, zirconia, yttrium oxide, yttrium nitrate, polyethylene glycol, sodium molybdate, hydroxymethyl cellulose, silane coupling agent KH-560, diphenyl Dimethoxysilane and deionized water are uniformly mixed, wherein the mass percentage of zinc powder is 20%, the mass percentage of aluminum powder is 6%, the mass percentage of zirconia is 10%, and the mass percentage of yttrium oxide is 0.5%. , the mass percentage of yttrium nitrate is 1%, the mass percentage of polyethylene glycol is 20%, the mass percentage of sodium molybdate is 6%, the mass percentage of hydroxymethyl cellulose is 0.9%, the silane coupling agent KH-560 The mass percent of diphenyldimethoxysilane is 2%, the mass percent of diphenyldimethoxysilane is 6%, and the balance is deionized water; the zinc powder and aluminum powder are circular flake powders, and the sheet diameter of the zinc powder is 10-20 μm an...

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Abstract

The invention provides a magnesium alloy corrosion-resistant coating. The magnesium alloy corrosion-resistant coating is prepared by uniformly mixing zinc powder, aluminum powder, zirconium oxide, yttrium oxide, yttrium nitrate, polyethylene glycol, sodium molybdate, hydroxymethyl cellulose, a silane coupling agent KH-560, diphenyldimethoxysilane and deionized water according to a certain proportion. The invention also provides a method for improving corrosion resistance of a magnesium alloy by using the coating. The method comprises the following steps: firstly, pretreating the surface of the magnesium alloy; secondly, coating the coating on the surface of the magnesium alloy; thirdly, performing preheating treatment; and fourthly, performing curing treatment, and forming a corrosion-resistant coating on the surface of the magnesium alloy. By adopting the coating provided by the invention, the micro-hardness and corrosion resistance of the magnesium alloy can be significantly improved, the service life of the magnesium alloy can be prolonged, and wide application prospects can be achieved.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy surface engineering, and in particular relates to a magnesium alloy corrosion-resistant coating and its application. Background technique [0002] Magnesium alloys are called "green metals". They are widely used in many fields such as electric power industry, furniture, household consumer goods, office equipment, lathe equipment, optical equipment, rechargeable batteries, precision instruments, sports equipment and medical equipment. , aviation and other industries irreplaceable materials. However, since the equilibrium (standard) electrode potential of magnesium is very negative, both magnesium and magnesium alloys have high chemical and electrochemical activities, which limits the application of magnesium alloys. Therefore, scientists have studied many protective methods for magnesium alloys to improve their corrosion resistance. The main methods are: [0003] (1) Reduce the content of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/10C09D129/04C23C22/07
Inventor 郑斌王志华
Owner XIAN UNIV OF SCI & TECH
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