| abstract |
The composition for post-treatment of aluminum alloys and anodized aluminum and the process for using such compositions to improve the corrosion resistance, abrasion, and bond bonding properties of anodized aluminum and its alloys. The composition comprises an acidic aqueous solution having a pH ranging from about 2.5 to 4.5 containing effective amounts of trivalent chromium salts, alkali metal hexafluorozirconates, an alkali metal fluoro-compound, for example, fluorborates and / or fluorosilicates, and effective amounts of water soluble thickeners and surfactants. |