2A12T4铝合金型材在苛刻海洋大气环境中的腐蚀规律  

The corrosion laws of 2A12T4 aluminum alloy profiles in the harsh marine atmospheric environment

作　　者：高宝亭 冯超 孙海波[1] 刘杰 GAO Baoting;FENG Chao;SUN Haibo;LIU Jie(Northeast Light Alloy Co.,Ltd.,Harbin 150060,China)

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060

出　　处：《轻合金加工技术》2024年第5期27-32,共6页Light Alloy Fabrication Technology

基　　金：国家自然科学基金资助项目(U2141215)。

摘　　要：采用室内周期性浸泡的模拟试验方法,研究了2A12T4铝合金型材在苛刻海洋大气环境中的腐蚀行为及电化学规律。试验结果表明,在干燥温度为60℃,浸泡在质量分数为3.5%的氯化钠溶液的条件下,随着时间的延长型材出现明显的点蚀现象和较重的层片状剥蚀,腐蚀失重规律符合幂指数规律,腐蚀电位先降低后升高再降低最后趋于稳定。The corrosion behavior and electrochemical laws of 2A12T4 aluminum alloy profiles in harsh marine atmospheric environment were studied with the indoor simulation experiment of periodic immersion method.The experiment was conducted at drying temperature of 60℃and in the soaking solution of sodium chloride with wt 3.5%.The results show that significant pitting and heavy flaky erosion appear with the extension of time.The law of corrosion weight loss conforms to the power-law.The corrosion potential first decreases,then increases,then decreases,and finally stabilizes.

关 键 词：2A12T4铝合金 型材 干湿周浸 腐蚀 电化学规律 

分 类 号：TG132.3[一般工业技术—材料科学与工程]