7A04铝合金在西沙海洋大气中的腐蚀行为  

Corrosion Behavior of 7A04 Aluminium Alloy in Xisha Marine Atmosphere

作　　者：邢士波[1,2] 李晓刚[1] 李丽[2] 董超芳[1] 

机构地区：[1]北京科技大学新材料技术研究院腐蚀与防护中心,教育部腐蚀与防护重点实验室,北京100083 [2]河北工程大学装备制造学院,邯郸056038

出　　处：《腐蚀与防护》2013年第9期796-799,共4页Corrosion & Protection

基　　金：国家自然科学基金(51131005;51171023);中央高校基本科研业务费专项资金(FRF-TP-11-006B)

摘　　要：通过在我国西沙典型海洋大气环境进行大气暴晒试验,测定了7A04铝合金在西沙典型海洋大气环境中的失重曲线、进行了幂函数拟合,通过SEM,EDS和XRD对7A04铝合金腐蚀宏观表面形貌、腐蚀微观表面形貌和腐蚀产物结构进行观察和分析。结果表明,随腐蚀时间的延长,7A04铝合金腐蚀产物不断增多,失重数值增加,腐蚀失重与时间的关系呈幂函数规律(C=At")。最终的腐蚀产物形貌呈块状均匀分布,主要由Al_2O_3,Al(OH)_3和AlOOH等组成。The corrosion behaviors of 7A04 aluminum alloy in Xisha marine atmosphere were investigated by atmospheric exposure experiments and testing the weight loss curve, corrosion rate and power function fitting. The macro and micro surface morphology of aluminum alloy corroded and the structure of corrosion products were observed and analyzed by SEM, EDS and XRD. The results show that with testing hours prolonging, the corrosion product and mass loss increased. The relationship between corrosion loss and time accords with exponential attenuation rule as C=Atn. Surface observation reveals that the corrosion product was agglomerated and accidented. The corrosion product was mainly composed of Al2 O3, AI（OH）3 and AIOOH.

关 键 词：7A04铝合金 西沙 大气腐蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]