电力设备材料酒石酸阳极氧化及其腐蚀行为研究  

Study on Tartaric Acid Anodic Oxidation of Electrical Equipment Materials and Its Corrosion Behavior

作　　者：王臻卓[1,2] WANG Zhenzhuo(Henan Vocational and Technical College of Industry,Nanyang 473000,China;College of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]河南工业职业技术学院,河南南阳473000 [2]太原理工大学电气与动力工程学院,山西太原030024

出　　处：《电镀与精饰》2022年第6期26-30,共5页Plating & Finishing

基　　金：河南省科技攻关项目(212102210615)。

摘　　要：对电力设备常用的2A12铝合金进行酒石酸阳极氧化,并选用3.5%NaCl溶液作为腐蚀介质浸泡不同时间,研究阳极氧化膜的腐蚀行为。结果表明:未浸泡的阳极氧化膜表面较平整,只分布着纳米量级的孔洞阵列,其阻抗模值(|Z|_(0.01 Hz))达到103.0 kΩ·cm^(2)。随着浸泡时间延长,阳极氧化膜的形貌发生显著变化,腐蚀程度逐渐加重,导致形成了接近于微米量级的凹坑甚至缝隙,腐蚀坑面积百分比呈增大的趋势,腐蚀产物也明显增多。浸泡72 h、168 h后的|Z|_(0.01 Hz)相比于未浸泡时分别降低了约1、2个数量级,并且到一定阶段后基本不变。阳极氧化膜的腐蚀形式从局部腐蚀逐步转变成全面腐蚀,对腐蚀介质的阻隔能力减弱,表现为腐蚀程度加重,腐蚀失重呈增加的趋势。2A12 aluminum alloy used for electrical equipment was treated by tartaric acid anodic oxidation,and the corrosion behavior of anodic oxide film was studied using 3.5 % NaCl solution as corrosive medium to immerse for different time.The results showed that the unsoaked anodic oxide film had smooth surface and there was an array of nanoscale pores,its impedance modulus value (|Z|_(0.01 Hz))reached 103.0 kΩ ·cm^(2).With the extension of immersion time,the morphology of anodic oxide film changed significantly,and the gradual deterioration of the corrosion resulted in the formation of pits and even cracks close to the micron scale.The percentage of corrosion pits showed an increasing trend,and the corrosion products increased significantly.The |Z|_(0.01 Hz)of anodic oxide film immersed for 72 h and 168 h was decreased by about one order of magnitude and about two orders of magnitude respectively compared with that of not immersed anodic oxide film,and it was basically unchanged after a certain stage.The corrosion form of anodic oxide film gradually changed from local corrosion to comprehensive corrosion,and the blocking ability to corrosive medium was weakened,resulting in aggravation of corrosion degree and increasing of corrosion weight loss.

关 键 词：酒石酸阳极氧化 阳极氧化膜 腐蚀行为 2A12铝合金 电力设备 

分 类 号：TQ153.6[化学工程—电化学工业]