在分析了国内外镀锡板合金层的形貌、结构以及基板的结晶取向后发现,镀锡基板的结晶取向强烈地影响着镀锡并软熔后所得到的锡铁合金层的形貌以及耐蚀性.基板中铁晶面的结晶取向在其后形成的锡铁合金层中得到了一定程度上的延续,铁的(110)晶面择优性越强,所得到的合金层的柱状结晶相应的越粗,同时合金层的耐蚀性越好.而(200)和(211)面的择优性越强,所得到的合金层的耐蚀性越差.实验结果表明,要提高镀锡板的耐蚀性就必须控制镀锡基板的表面质量,特别是有必要调整基板中铁晶面的择优取向.
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