Fabrication of corrosion-resistant superhydrophobic coating on magnesium alloy by one-step electrodeposition method  

作　　者：Tianxu Zheng Yaobo Hu Fusheng Pan Yuxin Zhang Aitao Tang 

机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China [2]National Engineering Research Center for Magnesium Alloys,Chongqing 400044,China

出　　处：《Journal of Magnesium and Alloys》2019年第2期193-202,共10页镁合金学报（英文）

基　　金：The authors are very grateful for the support from the National Key Research and Development Program of China(No.2016YFB0301102);the Fundamental Research Funds for the Central Universities(No.2018CDGFCL0005);the Postgraduate Education Fund of Chongqing University(No.201704020).

摘　　要：A one-step electrodeposition method was used to construct a superhydrophobic coating on the surface of magnesium alloy.Using magne-sium nitrate and ethanol solution of stearic acid as electrolyte,four groups of electrolytes with different ratios of stearic acid and magnesium nitrate were designed to explore the influence of electrolyte to the process.The contact angles of the four coating samples were 136.4±5.8°,152.7±2.8°,156.2±4.9°and 155.1±4.4°The addition of magnesium nitrate in the solution increased the hydrogen evolution reaction in the electrodeposition process,which was not conducive to electrodeposition process.During the deposition process,the sample prepared in a molar ratio of stearic acid to magnesium nitrate of 10:1 had the best corrosion resistance,and its corrosion circuit density was 3.74×10^(−8)A/cm^(2),far lower than the corrosion current density of the magnesium alloy substrate.

关 键 词：Magnesium alloy SUPERHYDROPHOBICITY Corrosion resistance. 

分 类 号：TG1[金属学及工艺—金属学]