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Corrosion resistant coating for metal magnesium and preparation method thereof

A metal magnesium and corrosion-resistant technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of reduced coating protection function, uneven corrosion, etc., and achieve long protection time, simple preparation process and operation, The effect of strong corrosion resistance

Inactive Publication Date: 2010-11-03
江苏渝鑫科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrode potentials of zinc powder and aluminum powder are different, adding them separately will cause uneven corrosion in the coating, causing the coating to quickly appear cavities and form corrosion channels, reducing the protective function of the coating

Method used

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  • Corrosion resistant coating for metal magnesium and preparation method thereof
  • Corrosion resistant coating for metal magnesium and preparation method thereof
  • Corrosion resistant coating for metal magnesium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation process of corrosion-resistant paint for magnesium alloy of the present invention is as follows:

[0027] Preparation of alloy powder: according to weight percentage: Cu is 2%, Sn is 0.01%, Sb is 0.2%, Si is 3%, Pr is 0.03%, and the rest is Ni for batching, wherein Sn and Sb are made of pure metal Ingots, pure cadmium grains for Cd, pure plates for Cu and Ni, silicon blocks for Si, and praseodymium-aluminum intermediate alloys containing Pr15% for Pr; the raw materials are put into a crucible with a bottom hole equipped with an induction coil and heated and melted. The diameter of the hole is 1-2mm. The lower part of the bottom hole of the crucible is equipped with a rotating molybdenum alloy runner. The upper part of the crucible is connected to a nitrogen pressure system. The melting is carried out under normal pressure. The induction coil plays the role of heating and melting the alloy. The temperature is 1700-1720°C (the temperature can only be heate...

Embodiment 2

[0030] Preparation of the alloy powder: the weight percentage of the chemical composition of the alloy powder is: Cu is 4%, Sn is 0.1%, Sb is 0.4%, Si is 6%, Pr is 0.09%, and the rest is Ni.

[0031] The percentage by weight of each component during coating preparation is: 45% alloy powder, 6.0% titanium carbonitride powder, 6% silicon nitride powder, 8.0% butanol, and the rest is epoxy resin liquid;

[0032] The preparation process is the same as in Example 1.

Embodiment 3

[0034] Preparation of the alloy powder: the weight percentage of the chemical composition of the alloy powder is: Cu is 3%, Sn is 0.09%, Sb is 0.3%, Si is 4%, Pr is 0.06%, and the rest is Ni.

[0035] The percentage by weight of each component during coating preparation is: 42% alloy powder, 5% titanium carbonitride powder, 5% silicon nitride powder, 7.5% butanol, and the rest is epoxy resin liquid;

[0036] The preparation process is the same as in Example 1.

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Abstract

The invention provides a corrosion resistant coating for metal magnesium and a preparation method thereof. The coating has favorable corrosion resistance. The preparation method has the advantages of simple process and low production cost and is suitable for industrial production. The corrosion resistant coating used for metal magnesium comprises the following chemical compositions in percentage by weight: 40-45wt% of alloy powder, 3-6wt% of titanium carbonitride powder, 3-6wt% of silicon nitride powder, 7-8wt% of butanol and the balance of epoxy resin liquid. The grain sizes of alloy powder,titanium carbonitride powder and silicon nitride powder are 270-800 meshes. The alloy powder comprises the following components in percentage by weight: 2-4wt% of Cu, 0.01-0.1wt% of Sn, 0.2-0.4wt% ofSb, 3-6wt% of Si, 0.03-0.09wt% of Pr and the balance of Ni.

Description

1. Technical field [0001] The invention belongs to the field of metal materials, and relates to a corrosion-resistant coating for metal magnesium and a preparation method thereof. 2. Technical background [0002] At present, in the field of coating materials, the corrosion protection of metal magnesium and magnesium alloys has been paid attention to. [0003] CN200810137357.9 application provides an ultra-light magnesium-lithium alloy high-efficiency anti-corrosion coating. Its composition in weight percent is: polyaniline: 5-20 percent; dispersant: 0.5-5 percent; solvent: 5-25 percent; film-forming substance: the balance. It is only suitable for ultra-light magnesium-lithium alloys, and the scope of use is narrow. [0004] Application No. CN200910236236.4 discloses an organic / inorganic silicon hybrid water-based corrosion-resistant coating suitable for the surface of magnesium alloys and a preparation method thereof. 20wt%, silicate 10wt%-20wt%, organic emulsion 5wt%-15w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/10C22C1/03B22F9/04
Inventor 王玲赵浩峰张禄
Owner 江苏渝鑫科技股份有限公司
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