• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Corrosion Behavior of Field-Exposed 7A04 Aluminum Alloy in the Xisha Tropical Marine Atmosphere
【24h】

Corrosion Behavior of Field-Exposed 7A04 Aluminum Alloy in the Xisha Tropical Marine Atmosphere

机译：西沙热带海洋大气中现场暴露的7A04铝合金的腐蚀行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Atmospheric corrosion behavior of 7A04 aluminum alloy exposed to a tropical marine environment for 4 years was investigated by weight loss test, morphology observation, and electrochemical impendence spectroscopy (EIS). The results showed that the weight loss of 7A04 alloy in the log-log coordinates can be approximately fitted with two liner segments, in which the slope value of the second segment is significantly lower than that of the first segment. This was mainly attributed to the protectiveness of the corrosion product layer formed on the specimen exposed for 12 and 24 months, which was further confirmed by the EIS results. Corrosion rate presented a significant fluctuation during the exposure test which is due to the deterioration effect caused by chloride ions and time of wetness and the stabilization process of the corrosion product layer. Intergranular corrosion occurred on the 7A04 alloy and then transformed into exfoliation corrosion because of the synergetic effect of the hydrogen-assisted crack initiation and the wedge effect-induced matrix delamination.
机译：通过失重测试，形态观察和电化学阻抗谱（EIS）研究了7A04铝合金暴露于热带海洋环境4年的大气腐蚀行为。结果表明，在对数-对数坐标中，7A04合金的失重可以近似拟合两个衬里部分，其中第二部分的斜率值明显低于第一部分。这主要归因于在暴露12个月和24个月的样品上形成的腐蚀产物层的保护性，这一点由EIS结果进一步证实。腐蚀速率在暴露试验中表现出明显的波动，这是由于氯离子和润湿时间以及腐蚀产物层的稳定化过程引起的劣化效应。 7A04合金发生晶间腐蚀，然后由于氢辅助裂纹萌生和楔效应引起的基体分层的协同作用而转变为剥落腐蚀。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号