Aqueous chromium-free zinc and aluminum coating and preparation method thereof
A zinc-aluminum paint, water-based technology, applied in the direction of coating, etc., can solve the problems of short service life of paint, annealing, high energy consumption, etc., and achieve the effects of ensuring production and personal safety, shortening time, and working environment sanitation and cleanliness
Inactive Publication Date: 2012-06-20
SHENZHEN NONFEMET TECH
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The invention discloses aqueous chromium-free zinc and aluminum coating. The coating comprises an agent A and an agent B, which are mixed and blended uniformly when the coating is used, wherein based on the total weight, which is 100 percent, of the agent A and the agent B, the agent A comprises 1 to 5 weight percent of emulsifier, 10 to 25 weight percent of ethanol, 0 to 5 weight percent of deforming agent, 0 to 0.3 weight percent of thickener and 25 to 35 weight percent of metal zinc aluminum powder or zinc aluminum paste; and the agent B comprises 20 to 40 weight percent of deionized water, and 10 to 20 weight percent of silane coupling agent. The aqueous chromium-free zinc and aluminum coating does not contain hexavalent chromium, lead, mercury and cadmium heavy metal ion compounds or toxic organic solvents such as benzene and dimethylbenzene. The curing temperature of the coating is 250 to 300 DEG C, and the curing time of the coating is 20 minutes which is much shorter. The invention also provides the preparation method and the coating method of the aqueous chromium-free zinc and aluminum coating.
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