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[目的]研究2A97铝锂合金在热带海洋大气环境下的腐蚀行为与规律，并建立腐蚀速率预测模型与室内加速试验方法。[方法]选取A、B、C三个典型热带岛礁作为曝露试验场地，开展多周期自然环境曝露试验。结合环境参数监测数据，利用灰色关联度分析筛选影响腐蚀的关键环境因子。基于幂函数回归方法，构建腐蚀速率随时间变化的预测模型。同时，设计并实施室内综合加速腐蚀试验，验证其与户外曝露结果的一致性。[结果]在A和B岛礁，平均降雨量是影响腐蚀速率的最主要因素，灰色关联系数分别为0.855和0.704；在C岛礁，相对湿度为主要因素，灰色关联系数为0.727。所建立的幂函数预测模型的决定系数(R2)均大于0.93，对2年期腐蚀速率的预测误差均低于15%。室内加速试验结果与户外曝露趋势吻合良好，验证了室内加速试验方法的有效性。[结论] 2A97铝锂合金在热带海洋环境中的腐蚀行为与相对湿度和降雨量密切相关，幂函数回归模型可用于其长期腐蚀速率预测。所建立的室内加速试验方法能较好地模拟实际环境腐蚀过程，为材料服役寿命评估与防护设计提供了科学依据。
Abstract：[Objective] The corrosion behavior and patterns of 2A97 Al–Li alloy in tropical marine atmospheric environment was studied to establish a corrosion rate prediction model along with an indoor accelerated testing method. [Method] Three typical tropical island-reefs(A, B, and C) were selected as exposure test sites for multi-cycle natural environment exposure tests. Environmental parameter monitoring data were combined with grey relational analysis to identify key environmental factors influencing corrosion. A power-function regression method was employed to develop a predictive model for corrosion rate over time. Meanwhile, an indoor comprehensive accelerated corrosion test was designed and conducted to verify its consistency with outdoor exposure results. [Result] At reefs A and B, average rainfall was the predominant factor affecting the corrosion rate, with grey relational coefficients of 0.855 and 0.704, respectively; at reef C, relative humidity was the main factor, with a grey relational coefficient of 0.727. The established power-function prediction models showed high coefficients of determination(R2 > 0.93), and the prediction errors for the 2-year corrosion rate were all below 15%. The indoor accelerated test results agreed well with the outdoor exposure trends, confirming the validity of the indoor accelerated testing method. [Conclusion] The corrosion behavior of 2A97 Al–Li alloy in tropical marine environments is closely related to relative humidity and rainfall. The power-function regression model can be used to predict its long-term corrosion rate. The developed indoor accelerated testing method can effectively simulate the actual environmental corrosion process, providing a scientific basis for material service life assessment and protection design.
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基本信息:
DOI：10.19289/j.1004-227x.2026.02.003
中图分类号:TG178
引用信息:
[1]丁丰,贾静焕,姜国杰,等.2A97铝锂合金在典型热带海洋大气环境中的腐蚀行为研究[J].电镀与涂饰,2026,45(02):19-25.DOI:10.19289/j.1004-227x.2026.02.003.
基金信息:
十四五技术基础项目（JSHS2020209B001-1）; 北京市自然科学基金资助项目（2244110）