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Water-based zinc-aluminum coating and production process thereof

A zinc-aluminum coating and production process technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problem that the corrosion resistance cannot reach 1000 hours, the appearance of water-based coatings is not bright enough, silvery white, surface hardness, wear resistance To solve the problem of low corrosion resistance, to achieve the effect of bright appearance, improved adhesion strength and stability, and strong corrosion resistance

Inactive Publication Date: 2022-01-25
JILIN LEAD CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite chromate compound has low surface hardness and wear resistance as a binder. In addition, the existing water-based coatings are not bright enough and silvery white; the corrosion resistance does not reach 1000 hours (thickness 6 microns); the stability is poor , is sensitive to temperature, carry-out amount, etc., which affects the cycle life

Method used

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  • Water-based zinc-aluminum coating and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A agent production steps:

[0052] S1: Preparation of vanadium passivation solution: deionized water 50-70%, sodium metavanadate 15-35%, preferably 65% ​​deionized water, sodium metavanadate 35%, dissolve completely first, then add nitric acid, adjust PH to 4.0-4.5; Zinc powder and aluminum powder pretreatment: add the flake zinc powder and aluminum powder in the formula of component A to the vanadium passivation solution, stir continuously for 30 minutes, and filter; silicon coating treatment, the The vanadium-passivated zinc and aluminum powders are added to the silane hydrolyzate under stirring, kept at 60°C for 4 hours, filtered, and dried;

[0053] S2: Coating production: add polyethylene glycol, ethanol, dipropylene glycol, mineral spirits, additives, surfactants in sequence, and disperse and stir at 1000-1200 at a high speed for 30 minutes; add pretreated zinc under high-speed dispersing and stirring , Aluminum dispersed at high speed for 4 hours;

[0054] B ag...

Embodiment 2

[0059] A agent production steps:

[0060] S1: Preparation of vanadium passivation solution: deionized water 65%, sodium metavanadate 35%, dissolve completely first, then add nitric acid, adjust pH to 4.0-4.5; zinc powder and aluminum powder have non-flaky structure;

[0061] S2: Coating production: add polyethylene glycol, ethanol, dipropylene glycol, mineral spirits, additives, surfactants in sequence, and disperse and stir at 1000-1200 at a high speed for 30 minutes; add pretreated zinc under high-speed dispersing and stirring , Aluminum dispersed at high speed for 4 hours;

[0062] B agent production steps:

[0063] Add deionized water and ethanol in sequence according to the formula ratio of component B, keep warm at 60°C for 4 hours, add boric acid and stir to dissolve, after the temperature drops to room temperature, add binder while stirring, and continue stirring for 2 hours;

[0064] C agent production steps: sequentially put 5% reactive diluent monomer, 28% oligome...

Embodiment 3

[0067] A agent production steps:

[0068] S1: Preparation of vanadium passivation solution: deionized water 50-70%, sodium metavanadate 15-35%, preferably 65% ​​deionized water, sodium metavanadate 35%, dissolve completely first, then add nitric acid, adjust PH to 4.0-4.5; Zinc powder and aluminum powder pretreatment: add the flake zinc powder and aluminum powder in the formula of component A to the vanadium passivation solution, stir continuously for 30 minutes, and filter; silicon coating treatment, the The vanadium-passivated zinc and aluminum powders are added to the silane hydrolyzate under stirring, kept at 60°C for 4 hours, filtered, and dried;

[0069] S2: Coating production: add polyethylene glycol, ethanol, dipropylene glycol, mineral spirits, additives, surfactants in sequence, and disperse and stir at 1000-1200 at a high speed for 30 minutes; add pretreated zinc under high-speed dispersing and stirring , Aluminum dispersed at high speed for 4 hours;

[0070] B ag...

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Abstract

The invention discloses a water-based zinc-aluminum coating and a production process thereof. The water-based zinc-aluminum coating comprises the following components in percentage by mass: a component A: 30-50% of zinc powder, 2-10% of aluminum powder, 1-3% of tin powder, 10-30% of polyethylene glycol, 1-2% of ethanol, 1-5% of dipropylene glycol, 1-5% of mineral spirit, 1-2% of an auxiliary agent, 1-5% of sodium meta-vanadate and 1-4% of a surfactant, wherein the components are dispersed, stirred and filtered; and a component B: 40-70% of water, 10-20% of a binder, 1-2% of boric acid, 1-5% of lithium silicate or sodium silicate, 5-10% of ethanol or methanol and 1-5% of polyethylene glycol. According to the invention, the component A, the component B and a component C are respectively arranged to form a three-layer adhesion paint layer structure of the water-based zinc-aluminum coating layer; and the component A forms a high-corrosion-resistance coating of the zinc-aluminum coating on the surface of a sprayed article, the component B forms a strong bonding layer of the component A and the component C, and the component C is subjected to ultraviolet irradiation curing to form an ultraviolet curing coating, so that the hardness and the wear resistance of the water-based zinc-aluminum coating are improved.

Description

technical field [0001] The invention relates to the technical field of zinc-aluminum paint, in particular to a water-based zinc-aluminum paint and a production process thereof. Background technique [0002] Zinc-aluminum coating is a coating with high corrosion resistance. Because its treatment process adopts a safe closed-cycle coating method, and the whole process has no pollution discharge, it is called the "green production" technology of surface treatment, which can replace traditional processes such as electro-galvanizing and electro-chrome plating, and has developed rapidly worldwide. Compared with traditional electroplating, hot-dip plating and other processes, zinc-aluminum coating technology has high corrosion resistance, no hydrogen embrittlement, high temperature resistance, controllable coating thickness, and less environmental pollution, so it is widely used in automobiles, ships, Railway, wind power, bridge, military and other industries. [0003] Zinc-alumi...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D133/00C09D5/10
CPCC09D5/103C09D5/106C09D175/14C08K2003/0806C08K2003/0893C08L33/00C08K3/08C08K9/10
Inventor 曲莹
Owner JILIN LEAD CHEM TECH CO LTD