为提高冷涂锌涂料的防腐性能,改善其与钢材的附着力,采用SEBS树脂为成膜物质,复合锌粉为防锈颜料,高沸点芳香烃为溶剂,并加入缓蚀剂及其他助剂,制备了冷涂锌防腐涂料.通过中性盐雾试验考察了漆膜的耐腐蚀性能,同时采用万用表及电化学方法测试了漆膜的导电性.结果表明:当干膜中球形锌粉含量为92%、片状锌粉含量为4%及石油磺酸钡缓蚀剂含量为1%时,漆膜耐盐雾时间达到2000h,附着力达到6.5 MPa;万用表测试表明涂层表面导通;电化学测试表明涂层表面电极电位为-1020mV,与热浸锌及电镀锌表面接近.
参考文献
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