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    • 70. 发明公开
    • IMPROVED PROTECTIVE COATINGS FOR METALS AND OTHER SURFACES
    • VERBESSERTE SCHUTZSCHICHTENFÜRMETALLE UND ANDEREOBERFLÄCHEN
    • EP1062378A4
    • 2003-07-09
    • EP99911308
    • 1999-03-11
    • NATURAL COATING SYSTEMS INTERN
    • TOMLINSON CHARLES E
    • C03C17/22C23C22/34C23C22/05C23C18/12C23C22/06C23C22/28C23C22/36C23C22/40C23C22/56C23C22/78C23C22/82C23C22/83
    • C23C22/34C03C17/22C03C2217/28C03C2218/11Y02T50/67
    • Compositions and processes are disclosed for producing improved environmental protection, corrosion resistance and improved paint adhesion for metals, e.g., ferrous, aluminum, or magnesium alloys, as well as other substrates upon contact. The compositions and processes comprise use of one or more Group IV-A metals, such as zirconium, in combination with one or more Group III-A metals, such as cerium, in an acidic solution with one or more oxyanions or other non-fluoanions to stabilize and solubilize the metals while fluorides are specifically excluded from the processes and compositions above certain levels. The processes can contain pretreatment stages that serve to activate a substrate surface and/or promote formation of mixed-metal oxide matrices through use of an oxygen donor. The compositions are at a pH below about 7.0 and are preferably in a range between about 1.0 and about 4.0. The coatings may contain surfactants, sequestering agents, or organic additives for improved corrosion protection and paint adhesion. The substrate may be treated by immersion, spray, fogging or rollcoat.
    • 公开了用于产生改善的环境保护,耐腐蚀性和改善金属例如亚铁,铝或镁合金以及接触时的其它基材的涂料附着力的组合物和方法。 组合物和方法包括一种或多种IV-A族金属如锆,与一种或多种III-A族金属(例如铈)在酸性溶液中与一种或多种含阴离子或其它非荧光体 稳定和溶解金属,而氟化物被特别排除在某些水平以上的方法和组合物中。 该方法可以包含预处理阶段,其用于激活底物表面和/或促进通过使用氧供体的混合金属氧化物基质的形成。 组合物的pH低于约7.0,优选在约1.0至约4.0的范围内。 涂层可以含有表面活性剂,螯合剂或有机添加剂,用于改善腐蚀保护和涂料附着力。 可以通过浸渍,喷雾,起雾或辊涂来处理基材。