Electrochemical Behavior and Microstructure of Recyclable Aluminiummagmesium Alloy Hot-dip Coating Deposited on Low Carbon Steel Substrates

作     者：Panomkorn KWAKHONG Apichart ARTNASEAW Chaiyaput KRUEHONG 

作者机构：Department of Chemical Engineering Faculty of Engineering Khon Kaen University 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2015年第22卷第8期

页      面：746-751页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：a partial result from a project supported by Khon Kaen University under Incubation Researcher Project 

主　　题：recycled A1-Mg alloy sacrificial ability anodic polarization corrosion 

摘      要：With the abundance and good corrosion resistance of aluminium, hot-dip technique was used to prepare the recycled Al with 8.2 mass% Mg alloy coating on low carbon steel substrates. Electrochemical behavior of this coating was investigated by an- odic polarization and open circuit potential measurement. Its microstructure and composition were observed by scanning electron microscope and energy-dispersive X-ray spectrometry, respectively. The long lasting corrosion performance of coated steels was in- vestigated under the salt fog spray test. From anodic polarization curves and open circuit potential, recycled Al with 8.2 mass% Mg coating performed adequate sacrificial ability. At 0.40 V, current density of recycled Al with 8.2 mass% Mg alloy coating was about 200 000 times higher than that of pure recycled Al coating, and was about 0.5 times lower than that of Zn coating. The microstruc- ture of recycled Al with 8.2 mass% Mg alloy coating on the steel substrate consisted ofAl3Mg2, Al-Fe intermetallic compound and Al matrix. The results from salt fog spray test showed that recycled Al with 8.2 mass% Mg alloy coated steel had similar corrosion resistance ability to Zn coated steel.