程乾,黄兴民,戴光泽

• 1:西南交通大学材料科学与工程学院
• 2:西南交通大学材料先进技术教育部重点实验室

摘要(Abstract)：

研究了热浸镀铝球墨铸铁在3.5%NaCl溶液中的耐腐蚀性能和不同温度下的冲击韧性。极化曲线和阻抗谱测试结果表明,热浸镀铝球墨铸铁在3.5%NaCl溶液中耐蚀性能得到了显著提高,主要原因为表面铝层易形成Al2O3钝化膜,降低了腐蚀电流密度。纯铝热浸镀形成的不规则舌状Fe2Al5硬脆相/铁素体基体界面处可能产生应力集中,承受冲击载荷时呈现为解理断裂。采用Al-3.6%Si浸镀液可改善Fe2Al5硬脆相/基体界面形貌,降低Fe2Al5合金层厚度,在良好低温冲击韧性的前提下,显著提高了球墨铸铁在3.5%NaCl溶液中的耐蚀性能。

关键词(KeyWords)： 球墨铸铁;热浸镀铝;腐蚀性能;冲击韧性

Abstract:

Keywords:

基金项目(Foundation): 国家“十一五”科技支撑计划(2009BAG12A07);; 2010年度聘请外籍教师教育部重点项目(教外专函[2010]33号);; 中央高校基本科研业务费专项资金(SWJTU12CX011)

作者(Author): 程乾,黄兴民,戴光泽

DOI: 10.13289/j.issn.1009-6264.2014.02.029

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