Passivation of corrosion product layer on AM50 Mg by corrosion inhibitor  

作　　者：Yan Li Xiaopeng Lu Di Mei Tao Zhang Fuhui Wang 

机构地区：[1]Shenyang National Laboratory for Materials Science,Northeastern University,3-11 Wenhua Road,Shenyang 110819,China [2]School of Materials Science and Engineering and Henan Key Laboratory of Advanced Magnesium Alloy,Zhengzhou University,100 Kexue Road,Zhengzhou 450001,China

出　　处：《Journal of Magnesium and Alloys》2022年第9期2563-2573,共11页镁合金学报（英文）

基　　金：financial support from National Natural Science Foundation of China(No.52071067);the Fundamental Research Funds for the Central Universities(N2002009)。

摘　　要：The influence of sodium dodecyl sulfate(SDS)on morphology and chemical composition of corrosion product layer formed onα-Mg matrix and cathodic Al-Mn intermetallic was systematically investigated by using FIB and TEM analysis for the first time to disclose the underlying inhibition mechanism.A porous corrosion bi-layer composed of crystalline MgO and Mg(OH)_(2)was observed on both ofα-Mg and Al-Mn intermetallic.It was found that a passive inner layer was deposited onα-Mg after immersion in SDS-containing NaCl solution,which can be ascribed to steady-state growth of magnesium and aluminum oxide under the protection of hydrophobic group of SDS.The inhibition mechanism of the inhibitor was mainly associated with formation of dense oxide layer onα-Mg matrix and preferential adsorption of SDS on the corrosion layer deposited on Al-Mn intermetallic.

关 键 词：MAGNESIUM TEM FIB Inhibition mechanism 

分 类 号：TG174.42[金属学及工艺—金属表面处理]