Organic protective coating used for low-treatment aluminum alloy surfaces

A pretreatment and slurry technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of reducing the compactness of the coating, poor adhesion and anti-corrosion of the substrate, and reduced anti-corrosion, so as to achieve high-efficiency anti-corrosion. effect, improve coating adhesion, and improve flexibility

Inactive Publication Date: 2019-06-11
MARINE CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] CN103642365B discloses a kind of marine aluminum alloy corrosion self-repairing intelligent coating and its preparation method. The corrosion resistance of the coating can reach 3000h, but the base material needs to be sandblasted, and the coating thickness is 300 microns. Adhesion and corrosion resistance on the material are poor
This mechanism is significantly different from the mechanism in this paper (capturing and decomposing water molecules). In this literature, the driven gas and water molecules, especially water molecules, are mixed in the coating, which will reduce the compactness of the coating and reduce the corrosion resistance. , and its critical pull-off adhesion has not been reported

Method used

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  • Organic protective coating used for low-treatment aluminum alloy surfaces
  • Organic protective coating used for low-treatment aluminum alloy surfaces
  • Organic protective coating used for low-treatment aluminum alloy surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Preparation of a pretreatment anticorrosive slurry 1

[0040]

[0041] Pretreatment anticorrosive slurry 1 preparation method: add formula amount of xylene and n-butanol into the container, place under high-speed stirring at 1000r / min, and add formula amount of BYK-P104S, 60% epoxy 601 in turn Liquid (the 60% epoxy 601 liquid is prepared by adding solid epoxy 601 resin to a mixed solvent of xylene and n-butanol under stirring), zinc chrome yellow, aluminum tripolyphosphate, disperse for 20 minutes, add Formulated Adherant 1121, disperse for 10 minutes, add anti-settling agent DeuRheo229 and continue to stir for 30 minutes to obtain a yellow viscous mixture with a stable pretreatment anticorrosive slurry 1 with a viscosity of 400-500 mPa.s.

Embodiment 2

[0042] Example 2: Preparation of a pretreatment anticorrosive slurry 2

[0043]

[0044]

[0045] The preparation method of pretreatment anticorrosive slurry 2 is: add formula amount of xylene and n-butanol into the container, place it under high speed stirring, rotate speed of 1500r / min, add formula amount of FX9086, 60% epoxy 604 liquid in turn (The 60% epoxy 604 liquid is prepared by adding solid epoxy 604 resin to the mixed solvent of xylene and n-butanol under stirring), zinc oxide, zinc phosphate, disperse for 15 minutes, and add the formulated amount of Adherant 1051, disperse for 10 minutes, add anti-settling agent BENGEL958 and continue stirring for 30 minutes to obtain a white viscous mixture with a stable pretreatment anticorrosive slurry with a viscosity of 600-700 mPa.s.

Embodiment 3

[0046] Example 3: Preparation of room temperature curing organic protective coating (HDD207) for low treatment aluminum alloy surface

[0047] The formula of component A is as follows:

[0048]

[0049] Preparation method of component A: add 60% epoxy 601 liquid, Levaslip466, and solvent according to the above formula into a stirring vessel, stir at 800r / min for 20min until uniform; then add pretreatment anticorrosive slurry 1, 996 titanium dioxide, Calcium carbonate, aluminum powder, DeuRheo229, stir at 1000r / min for 30min until evenly dispersed, use sand mill to grind to a fineness of less than 60 microns, filter screen, weighing and packaging, to prepare A component color paste.

[0050] The formula of component B is as follows:

[0051]

[0052] The polyamide curing agent and the mixed solvent of xylene and n-butanol are stirred and dissolved to prepare the B component.

[0053] The A and B components are mixed and configured at a weight ratio of 5:1.

[0054] The coating can be app...

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Abstract

The invention relates to a high-adhesion normal-temperature curing organic protective coating suitable for surfaces of a plurality of types of low-treatment aluminum alloy. A method for preparing thecoating firstly comprises the step of preparing pretreatment anticorrosive slurry: adding a passivating functional pigment, a resin liquid, a coupling agent and an auxiliary agent into a mixed solventunder stirring to obtain the stable slurry; and the normal-temperature curable organic protective coating used for the low-treatment aluminum alloy surfaces is composed of an A component and a B component, and the A component and the B component are used cooperatively, wherein the A component mainly comprises the above pretreatment anticorrosive slurry, and further comprises an epoxy resin liquid, a pigment filler, an auxiliary agent and an appropriate amount of solvent, and the B component is a mixture of a polyamide-based curing agent and a mixture of xylene and n-butanol. The special coating for the low-treatment aluminum alloy provided by the invention not only has excellent comprehensive performance on the aluminum substrate, but also eliminates a complicated and cumbersome processing technology to a substrate before coating of a traditional coating, meets novel trend of saving energy and reducing consumption, and has broad application prospects.

Description

Technical field: [0001] The invention belongs to the field of special anticorrosive coatings, and in particular relates to a room temperature curing organic protective coating with high adhesion suitable for the surface of various types of low-treatment aluminum alloys and a preparation method thereof. Background technique: [0002] With the improvement of the weight of various equipment, a large number of high-strength, lightweight aluminum alloys, titanium alloys and other light metals have been adopted. Among them, aluminum and aluminum alloys can easily form a dense oxide film on the surface in the air. The oxide film is dense It is smooth and has a good protective effect on the aluminum alloy matrix, but the oxide film is easily damaged and if the surface contains positive impurities, such as copper, iron, etc., the stability of the oxide film will be reduced, which directly affects the material Service life, so applying organic coating on the aluminum alloy surface is an ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D5/10
Inventor 关迎东赵乐肖秀松李文博林巧杨凯郭常青方倩孙春龙张善贵
Owner MARINE CHEM RES INST
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