热压烧结Fe3Si-Cu在NaOH溶液中的腐蚀行为Corrosion behavior of hot-pressing sintered Fe3Si-Cu composite in NaOH solution
贾建刚,窦萍,季根顺,郭铁明,安亮,马勤
摘要(Abstract)：
以原子比为3∶1的Fe粉和Si粉球磨20 h后与一定量的Cu粉混合,在(1000±30)℃,20 MPa的压力下热压烧结制备了致密的Fe3Si-Cu复合材料。通过浸泡腐蚀和电化学腐蚀两种方法研究加入不同质量分数Cu(5%,10%)的Fe3Si-Cu复合材料在0.6、0.7和0.8 mol/l的NaOH溶液中的腐蚀行为。结果表明,两种材料在不同摩尔浓度的NaOH溶液中的腐蚀是一种均匀的全面腐蚀。复合材料中的Fe3Si和Cu两相在NaOH溶液中组成一腐蚀电池,其中Fe3Si为阳极发生腐蚀,Cu作为阴极得到保护;Fe3 Si-5%Cu复合材料在NaOH溶液中的自腐蚀电位随NaOH浓度的增加而增加,自腐蚀电流在0.7 mol/l的NaOH溶液中最低;Fe3 Si-10%Cu在三种浓度的NaOH溶液中的自腐蚀电位相差较小,自腐蚀电流在浓度为0.6 mol/l的NaOH溶液中最小,在0.7mol/l的NaOH溶液中最大。
关键词(KeyWords)： 热压烧结Fe3Si-Cu;浸泡腐蚀;电化学腐蚀;NaOH溶液
基金项目(Foundation): 国家自然科学青年基金项目(51001057)
作者(Author): 贾建刚,窦萍,季根顺,郭铁明,安亮,马勤
DOI: 10.13289/j.issn.1009-6264.2012.01.010
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