Abstract

The stress corrosion cracking (SCC) of high-strength 2024-T351 and 7075-T651 aluminum alloys in simulated marine atmospheric medium containing HSO₃⁻ was investigated. The results showed that the presence of HSO₃⁻ could significantly accelerate the corrosion process of 2024-T351 and 7075-T651 high-strength aluminum alloy. This process was attributed to the enhanced anodic dissolution and hydrogen embrittlement caused by the HSO₃⁻. The SCC susceptibility showed an increasing trend in both of aluminum alloys with increasing HSO₃⁻ concentration. Meanwhile, the hydrogen generated by HSO₃⁻ was shown to change the failure mode of these two aluminum alloys.

中文翻译：

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2024和7075高强度铝合金在模拟海洋环境中受SO 2污染时的应力腐蚀开裂行为

抽象的

高强度2024-T351和7075-T651在含有HSO模拟海洋大气介质铝合金的应力腐蚀开裂（SCC）₃ ^-的影响。结果表明，HSO的存在₃ ^-可以显著加速2024-T351和7075-T651的高强度铝合金的腐蚀过程。该过程归因于引起HSO增强阳极溶解和氢脆₃ ^- 。所述SCC敏感性表明在两种铝合金的增加趋势随着HSO ₃ ^-的浓度。同时，通过HSO产生的氢气₃ ^- 被证明改变了这两种铝合金的失效模式。