采用电化学方法、化学分析和表面分析技术,系统研究了Cu-20Zr双相铸态合金和磁控溅射Cu-20Zr纳米薄膜在HCl溶液中的脱合金腐蚀规律.对Cu-20Zr双相铸态合金的研究表明,铸态Cu-20Zr合金中的双相为富Zr的Cu51Zr14相,及Cu与Cu9Zr2的共晶组织;在低阳极极化电位条件下,Cu51Zr14相因富含活性组元Zr而优先溶解,说明双相合金的溶解行为首先决定于合金的相及其本身的活性.对溅射Cu-20Zr纳米薄膜腐蚀规律的研究表明,在不同电极电位下,薄膜中各元素的溶解规律不同.当电极电位低于Cu的标准电极电位时,材料的腐蚀以富Zr相中Zr组元的优先溶解为主;但当电极电位高于Cu的标准电极电位后,薄膜中Cu、Zr元素同时溶解;随后,由于Cu2+与溶液中的Cl-反应,生成氯化铜或氯化亚铜腐蚀产物覆盖于薄膜表面,使Cu的溶解过程受到抑制,但Zr元素却仍然随电极电位的增加而快速溶解.
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