发明申请
US20070099022A1 Non-chromium post-treatment for aluminum coated steel 审中-公开
铝镀层钢的非铬后处理

Non-chromium post-treatment for aluminum coated steel
摘要:
Compositions and process for post-treating aluminum and aluminum alloy coated steel substrates to improve the corrosion resistance and adhesive bonding strength of the aluminum coated substrates. The composition comprises treating the aluminum or aluminum alloy coated steel substrates with an acidic aqueous solution comprising, per liter of solution, from about 0.1 to 22 grams of a hexafluorozirconate, from about 0.1 gram up to the solubility limit of a water soluble cationic zinc compound and, optionally, effective amounts of water soluble thickeners and/or surfactants.
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