Magnesium alloy corrosion-resistant coating and application thereof

A technology for magnesium alloys and coatings, applied in anti-corrosion coatings, metal material coating processes, coatings, etc., can solve the problems that cannot well solve the anti-corrosion and service performance requirements of magnesium alloys, affect the application range of magnesium alloys, etc., and achieve The preparation process is simple and feasible, the repeatability is strong, the effect of high hardness and corrosion resistance

Active Publication Date: 2015-07-08
XIAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Magnesium alloy corrosion-resistant coating and application thereof
  • Magnesium alloy corrosion-resistant coating and application thereof
  • Magnesium alloy corrosion-resistant coating and application thereof

Examples

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Example Embodiment

[0038] Example 1

[0039] The magnesium alloy corrosion resistant coating of this embodiment is composed of zinc powder, aluminum powder, zirconium oxide, yttrium oxide, yttrium nitrate, polyethylene glycol, sodium molybdate, hydroxymethyl cellulose, silane coupling agent KH-560, diphenyl Dimethoxysilane and deionized water are mixed uniformly, in which 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%, and the silane coupling agent KH-560 The mass percentage of diphenyldimethoxysilane is 3%, the mass percentage of diphenyldimethoxysilane is 4%, and the balance is deionized water; the zinc powder and aluminum powder are round flake powders, and the flake diam...

Example Embodiment

[0053] Example 2

[0054] The magnesium alloy corrosion resistant coating of this embodiment is composed of zinc powder, aluminum powder, zirconium oxide, yttrium oxide, yttrium nitrate, polyethylene glycol, sodium molybdate, hydroxymethyl cellulose, silane coupling agent KH-560, diphenyl Dimethoxysilane and deionized water are mixed uniformly, in which 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%, and the silane coupling agent KH-560 The mass percentage of diphenyldimethoxysilane is 5%, the mass percentage of diphenyldimethoxysilane is 3%, and the balance is deionized water; the zinc powder and aluminum powder are round flake powders, and the flake diame...

Example Embodiment

[0065] Example 3

[0066] The magnesium alloy corrosion resistant coating of this embodiment is composed of zinc powder, aluminum powder, zirconium oxide, yttrium oxide, yttrium nitrate, polyethylene glycol, sodium molybdate, hydroxymethyl cellulose, silane coupling agent KH-560, diphenyl Dimethoxysilane and deionized water are mixed uniformly, 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%, and the silane coupling agent KH-560 The mass percentage of diphenyldimethoxysilane is 2%, the mass percentage of diphenyldimethoxysilane is 6%, and the balance is deionized water; the zinc powder and aluminum powder are round flake powders, and the flake diam...

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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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IPC IPC(8): C09D5/10C09D129/04C23C22/07
Inventor 王志华
Owner XIAN UNIV OF SCI & TECH
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