有机-无机杂化涂层制备及耐腐蚀性能研究

PREPARATION AND CORROSION CHARACTERIZATION OF ORGANIC-INORGANIC HYBRID COATIGNS

采用溶胶-凝胶法,以甲基三乙氧基硅烷(MTEOS)和正硅酸乙酯(TEOS)为原料,用浸渍-提拉法,在LY12铝合金基体表面成功制备了有机-无机杂化涂层.涂层表面光滑、平整、致密、无裂纹.通过液态浸渍实验、盐雾腐蚀实验和电化学腐蚀实验研究了有机-无机杂化涂层的耐腐蚀性能.结果表明,有机-无机杂化涂层耐腐蚀性能优良,具有很大的应用前景,使此杂化膜替代对环境有害的铬酸盐转化膜成为可能.

Organic-inorganic hybrid coatings are prepared by sol-gel process, using methyltriethoxy silane （MTEOS） and tetraethoxy silane （TEOS） precursors. The as-prepared hybrid coatings were dense, uniform and defect-free. The corrosion resistance of the hybrid coatings applied on aluminum alloys is particular tested. The coatings show excellent corrosion resistant properties. So the new hybrid chromate-free coating systems can provide long-term and environmental friendly corrosion protection, in the contrast, the traditional chromate-based conversion coatings are toxic and suspicious of carcinogenic danger.