高强Al-Cu合金2219及其熔敷金属的点蚀行为研究

1.中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳,110016

2.中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳,110016

3.中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳,110016

基金项目: 国家科技攻关项目(2002AA305402)

PITTING CORROSION OF HIGH STRENGTH AL - CU ALLOY 2219 AND ITS OVERLAYERS

采用循环极化电化学测试、浸泡实验和表面形貌观察,研究了2219铝合金及其2种焊丝的熔敷金属在3.5%NaCl溶液中的点蚀性能.结果表明,2219铝合金抗点蚀性能优于2种焊丝的熔敷金属,这主要与a固溶体中析出的第二相θ(Al2Cu)颗粒的数量和分布形式有关.

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