Resin/silane compounded passivation liquid for galvanized coil steel and preparation method of resin/silane compounded passivation liquid

A technology of galvanized coil and passivation solution, applied in the direction of metal material coating process, etc., can solve the problems of restricting large-scale production and high production cost, achieving high stability, low raw material cost, and solving the effect of chromium pollution

Inactive Publication Date: 2012-07-04
ANHUI WEILAI SURFACE TECH
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  • Resin/silane compounded passivation liquid for galvanized coil steel and preparation method of resin/silane compounded passivation liquid
  • Resin/silane compounded passivation liquid for galvanized coil steel and preparation method of resin/silane compounded passivation liquid
  • Resin/silane compounded passivation liquid for galvanized coil steel and preparation method of resin/silane compounded passivation liquid

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[0032] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0033] The surface of the galvanized steel coil is chemically degreased with an alkaline degreasing agent, rinsed with tap water, rinsed with deionized water, and then dried with hot air before pretreatment. Pretreatment temperature: room temperature 0-35°C; passivation time: 10-20s; passivation method: roller coating, spraying, dipping; drying temperature: 50-90°C.

[0034] Paint the pretreated galvanized coil steel, paint type: polyurethane paint; coating method: roller coating; curing temperature: 200-220°C; curing time: primer 30-40s, back paint 40-50s, Topcoat 50-60s; post-treatment method: water cooling or natural cooling.

[0035] The composition and content of the passivation treatment solution used in the embodiment of the present invent...

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Abstract

The invention provides a resin/silane compounded passivation liquid for galvanized coil steel and a preparation method of the resin/silane compounded passivation liquid, and belongs to the technical field of chrome-free passivation of a galvanized plate. The passivation liquid comprises the following constituents by weight percent: 0.01 to 10 percent of inorganic fluorine-containing acid, 0.01 to 10 percent of organic acid, 0.01 to 5 percent of silane coupling agent, 0.01 to 5 percent of resin, 0.01 to 5 percent of inorganic nano particle, 0.01 to 5 percent of dispersing agent, and water in balancing amount. According to the method provided by the invention, a layer of organic/inorganic composite film can be formed on the surface of the galvanized coil steel, so that the corrosion resistance and the adhesive force are excellent, and the performance is superior to that of a passive film made of a chromizing liquid. The invention has the advantages that the cost is low; the process is simple; the stability is high; the environmental pollution is low; and the economic and the social benefits are higher.

Description

technical field [0001] The invention belongs to the technical field of chrome-free passivation of galvanized sheets, and in particular relates to a resin / silane composite passivation solution suitable for galvanized steel coils and a preparation method thereof. Background technique [0002] Galvanized coil steel is a common substrate for color-coated sheets, which must be pretreated before painting to improve corrosion resistance and paintability. The traditional treatment method is to use chromium solution passivation to form a passivation film containing Cr(VI) on the surface of the galvanized layer. This passivation process has good corrosion resistance, mature technology, low cost, simple operation, It has the advantages of beautiful appearance and self-repair ability. However, due to the high toxicity and carcinogenicity of Cr(VI), the discharge of passivation waste liquid containing Cr(VI) has been strictly controlled, which greatly limits its application. In order t...

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Application Information

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IPC IPC(8): C23C22/34
CPCC23C2222/20
Inventor 童学宝
Owner ANHUI WEILAI SURFACE TECH
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