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首页> 外文期刊>Journal of Materials Engineering and Performance >Long-Term Atmospheric Corrosion of Aluminum Alloy 2024-T4 in a Coastal Environment
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Long-Term Atmospheric Corrosion of Aluminum Alloy 2024-T4 in a Coastal Environment

机译：沿海环境中2024-T4铝合金的长期大气腐蚀

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摘要

Aluminum alloy 2024-T4 specimens were exposed to atmosphere for 7, 12, and 20 years, respectively, to study long-term corrosion in a coastal environment. One-directional corrosion region and cross-directional corrosion region were defined according to corrosion characters. The statistical regularities, surface appearance, corrosion products, and cross-sectional morphology of both regions were investigated. It was found that the minimum remaining thicknesses of each region can be described by a normal distribution and linearly decrease as the exposure time is increased from 7 to 20 years. The corrosion pits, chlorine ions, and interlinked inner pits are promoting exfoliation, and the alloy's corrosion susceptibility along the long transverse direction is strongly location dependent due to the restrictions imposed by the side material.
机译：将2024-T4铝合金试样分别暴露于大气7年，12年和20年，以研究沿海环境中的长期腐蚀。根据腐蚀特性定义了单向腐蚀区域和横向腐蚀区域。研究了两个区域的统计规律，表面外观，腐蚀产物和横截面形态。已经发现，每个区域的最小剩余厚度可以用正态分布描述，并且随着曝光时间从7年增加到20年而线性减小。腐蚀坑，氯离子和相互连接的内部坑正在促进剥落，并且由于侧材施加的限制，合金在长横方向上的腐蚀敏感性在很大程度上取决于位置。

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