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Baking varnish for magnesium aluminum alloy base material and preparation and using methods thereof

A magnesium-aluminum alloy and baking paint technology, applied in the field of baking paint, can solve the problems of road antifreeze salt comprehensive corrosion, non-conductive film layer, and difficult coating, so as to save time, manpower and material resources, simple construction process, and reduce pretreatment process Effect

Active Publication Date: 2011-09-14
肇庆千江高新材料科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong electrochemical activity of magnesium alloys, they are faced with serious corrosion problems when used in structural parts, such as galvanic corrosion of contact parts with dissimilar metals, corrosion of the inner surface of lightweight engine parts by refrigerants, road antifreeze salts, etc. general corrosion
Among the many anti-corrosion measures for magnesium alloys (high-purity alloys, new alloys, ion implantation, rapid solidification process, surface protection layer, etc.), coating protection technology is low in cost and simple in process, but due to the chemical activity of magnesium alloy itself and casting defects, etc. Factors have brought great difficulties to the coating of traditional coatings, so in order to obtain coatings with high adhesion, strong corrosion resistance and beautiful appearance on the surface of magnesium alloys, it is necessary to go through the correct pretreatment process
Although good bonding force and corrosion resistance can be obtained after proper pretreatment, there are still problems such as non-conductivity of the film layer and environmental protection.

Method used

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  • Baking varnish for magnesium aluminum alloy base material and preparation and using methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The steps of the method for preparing the baking varnish for the magnesium-aluminum alloy base material are as follows:

[0039] (1) Add 10 grams of polyester modified acrylic resin, 8 grams of epoxy resin, 0.3 grams of defoamer, 0.3 grams of dispersant, 0.1 grams of wetting agent, 0.3 grams of leveling agent, and 2 grams of solvent into the stirring In the kettle, under the condition of 400r / min rotating speed, stir for 5 minutes;

[0040] (2) Add 28 grams of color paste, 20 grams of fillers, and 0.5 grams of anti-settling agent, and stir and disperse at high speed for 30 minutes at a speed of 800 r / min;

[0041] (3) Finally, add 3 grams of amino resin, 8.5 grams of adhesion promoter, and 1 gram of solvent, and stir for 20 minutes at a speed of 400 r / min to complete the preparation process of the polyester baking varnish.

[0042] The method of using the polyester baking varnish for the magnesium-aluminum alloy base material prepared in this example is: weigh the poly...

Embodiment 2

[0045] The steps of the method for preparing the baking varnish for the magnesium-aluminum alloy base material are as follows:

[0046] (1) Add 11 grams of polyester modified acrylic resin, 8.2 grams of epoxy resin, 0.32 grams of defoamer, 0.32 grams of dispersant, 0.12 grams of wetting agent, 0.32 grams of leveling agent, and 2.15 grams of solvent into the stirring In the kettle, under the condition of 440r / min rotating speed, stir for 5 minutes;

[0047] (2) Add 28.7 grams of color paste, 20.5 grams of fillers, and 0.57 grams of anti-settling agent, and stir and disperse at high speed for 31 minutes at a speed of 840r / min;

[0048] (3) Finally, add 3.2 grams of amino resin, 8.75 grams of adhesion promoter, and 1.15 grams of solvent, and stir for 21 minutes at a speed of 420 r / min to complete the preparation process of the polyester baking varnish. The method of using the polyester baking varnish for the magnesium-aluminum alloy base material prepared in this example is: wei...

Embodiment 3

[0051] The steps of the method for preparing the baking varnish for the magnesium-aluminum alloy base material are as follows:

[0052] (1) Add 12 grams of polyester modified acrylic resin, 8.4 grams of epoxy resin, 0.34 grams of defoamer, 0.34 grams of dispersant, 0.14 grams of wetting agent, 0.34 grams of leveling agent, and 2.3 grams of solvent into the stirring In the kettle, under the condition of 480r / min rotating speed, stir for 6 minutes;

[0053] (2) Add 29.4 grams of color paste, 21 grams of fillers, and 0.64 grams of anti-settling agent, and stir and disperse at high speed for 32 minutes at a speed of 880 r / min;

[0054] (3) Finally, add 3.4 grams of amino resin, 9 grams of adhesion promoter, and 1.3 grams of solvent, and stir for 22 minutes at a speed of 440 r / min to complete the preparation process of the polyester baking varnish. The method of using the polyester baking varnish for the magnesium-aluminum alloy base material prepared in this example is: weigh the...

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Abstract

The invention discloses a baking varnish for a magnesium aluminum alloy base material and preparation and using methods thereof. The preparation method comprises the following steps of: (1) adding polyester modified acrylic resin, epoxy resin, an anti-forming agent, a dispersing agent, a wetting agent, a leveling agent, and a part of solvent in a certain ratio into a stirring kettle sequentially and stirring; (2) adding color paste, filler, and an antisetting agent and stirring in a high speed; and (3) finally adding amino resin, adhesion promoter, and residual solvent and uniformly stirring to finish the whole preparation process of the polyester baking varnish. The using method of the prepared polyester baking varnish for the magnesium aluminum alloy base material comprises the following steps of: weighing the polyester baking varnish for the magnesium aluminum alloy base material, stirring uniformly in the weight ratio of the polyester baking varnish to diluents of 1:(0.4-0.6), spraying to the magnesium aluminum alloy base material, placing for 10 to 20 minutes, baking at the temperature of between 150 and 170 DEG C for 20 to 30 minutes, and baking and curing to obtain the polyester baking varnish layer.

Description

technical field [0001] The invention relates to a baking varnish, in particular to a baking varnish for a magnesium-aluminum alloy base material, a preparation method and a use method thereof. Background technique [0002] Magnesium alloy is currently the lightest metal engineering material, with a density of 1. 74 g / cm3, only 2 / 3 of aluminum and 1 / 4 of iron. At the same time, it has high strength, good electrical and thermal conductivity, and good damping and shock absorption With electromagnetic shielding performance, and low processing energy consumption, it can be recycled directly. Therefore, it has received widespread attention in industries such as automobiles, aerospace, and electronics, and is known as a green engineering material in the 21st century. However, due to the strong electrochemical activity of magnesium alloys, they are faced with serious corrosion problems when used in structural parts, such as galvanic corrosion of contact parts with dissimilar metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D161/20C09D163/00C09D7/12B05D7/16B05D3/04B05D3/02
Inventor 李会宁陈仕箐姚芳
Owner 肇庆千江高新材料科技股份公司
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