A magnesium alloy base material with high salt spray resistance and strong weather resistance protective coating, preparation method and application method

Abstract

The invention provides a high-salt-smog-resistance and high-weather-resistance type protecting coating for a magnesium alloy base material, a preparation method and an application method. The high-salt-smog-resistance and high-weather-resistance type protecting coating is characterized in that hydrogenated silicon bonded epoxy resin is used as main resin, and enables a coating layer to meet the demands of indexes on basic salt smog resistance and weather resistance; strongly hydrophobic fumed silica provides high settling resistance of the coating in storage and outstanding sag resistance in construction; a light stabilizer is combined and matched with an ultraviolet absorbent to further ensure the high weather resistance of the coating layer; graphene, nano-tantalum and glass flakes are combined to enable the improvement on the high slag smog resistance and corrosion resistance of the coating layer; talcum powder in the formula acts together with a KH-560 epoxy silane coupling agent to greatly improve the wet adhesion of a coating film to the magnesium alloy coating; xylene is used for adjusting the viscosity of the whole coating system. Compared with the prior art, the prepared special protecting coating for the magnesium alloy is high in weather resistance, outstanding in salt smog resistance, high in solid content, low in viscosity, and uniform in the coating layer.

Description

technical field

[0001] The invention belongs to the field of paint preparation, and in particular relates to a protective paint with high salt spray resistance and strong weather resistance for a magnesium alloy base material, a preparation method and a use method. Background technique

[0002] Magnesium alloys have the advantages of small specific gravity, specific strength, high specific stiffness, damping, machinability, good thermal conductivity, strong electromagnetic shielding ability, and easy recycling. They are called green engineering materials in the 21st century. In recent years, magnesium alloys have The worldwide annual growth rate is as high as 20%, and it has been widely used in the fields of automobile industry, communication electronics industry and aerospace industry. my country is rich in magnesium ore resources, and strengthening the research and application of magnesium alloys is an important direction for the benefit of the country and the people. [...

Examples

Embodiment 1

[0033] A magnesium alloy base material with high salt spray resistance and strong weather resistance protective coating, the coating includes the following raw materials in parts by weight, as shown in Example 1 in Table 1:

[0034] Table 1 Coating Formulation

[0035] (1) Stir the hydrogenated silicon-containing epoxy resin of the formula amount under the condition of 300-700 rev / min, and stir

[0036]

[0037] Add titanium dioxide, fumed silica, light stabilizer and UV absorber, xylene, graphene, nano-tantalum, yellow pigment, carbon black in turn under the same conditions, and stir for 10 minutes at 700-1200 rpm , and then, grind to a fineness of less than 15 microns;

[0038] (2) Stir the ground raw materials in step (1) at 300-700 rpm, add talcum powder and glass flakes under stirring conditions, stir at 800-1200 rpm for 15-20 minutes, and the fineness is less than 35 microns to make the coating.

Embodiment 2

[0040] A magnesium alloy base material with high salt spray resistance and strong weather resistance protective coating, the coating includes the following raw materials in parts by weight, as shown in Example 2 in Table 1:

[0041] The preparation method of the coating is the same as that of the coating in Example 1.

Embodiment 3

[0043] A magnesium alloy base material with high salt spray resistance and strong weather resistance protective coating, the coating includes the following raw materials in parts by weight, as shown in Example 3 in Table 1:

[0044] The preparation method of the coating is the same as that of the coating in Example 1.

technical field

[0001] The invention belongs to the field of paint preparation, and in particular relates to a protective paint with high salt spray resistance and strong weather resistance for a magnesium alloy base material, a preparation method and a use method. Background technique

[0002] Magnesium alloys have the advantages of small specific gravity, specific strength, high specific stiffness, damping, machinability, good thermal conductivity, strong electromagnetic shielding ability, and easy recycling. They are called green engineering materials in the 21st century. In recent years, magnesium alloys have The worldwide annual growth rate is as high as 20%, and it has been widely used in the fields of automobile industry, communication electronics industry and aerospace industry. my country is rich in magnesium ore resources, and strengthening the research and application of magnesium alloys is an important direction for the benefit of the country and the people. [...

Examples

Embodiment 1

[0033] A magnesium alloy base material with high salt spray resistance and strong weather resistance protective coating, the coating includes the following raw materials in parts by weight, as shown in Example 1 in Table 1:

[0034] Table 1 Coating Formulation

[0035] (1) Stir the hydrogenated silicon-containing epoxy resin of the formula amount under the condition of 300-700 rev / min, and stir

[0036]

[0037] Add titanium dioxide, fumed silica, light stabilizer and UV absorber, xylene, graphene, nano-tantalum, yellow pigment, carbon black in turn under the same conditions, and stir for 10 minutes at 700-1200 rpm , and then, grind to a fineness of less than 15 microns;

[0038] (2) Stir the ground raw materials in step (1) at 300-700 rpm, add talcum powder and glass flakes under stirring conditions, stir at 800-1200 rpm for 15-20 minutes, and the fineness is less than 35 microns to make the coating.

Embodiment 2

[0040] A magnesium alloy base material with high salt spray resistance and strong weather resistance protective coating, the coating includes the following raw materials in parts by weight, as shown in Example 2 in Table 1:

[0041] The preparation method of the coating is the same as that of the coating in Example 1.

Embodiment 3

[0043] A magnesium alloy base material with high salt spray resistance and strong weather resistance protective coating, the coating includes the following raw materials in parts by weight, as shown in Example 3 in Table 1:

[0044] The preparation method of the coating is the same as that of the coating in Example 1.

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