Corrosion resistance of rapidly formed in-situ steam Mg-Al LDH coating on AM50 Mg alloy pretreated with oxalic acid

被引：4
作者：
Pan, Shi-qi [1 ]
Wang, Jin-meng [1 ]
Zhang, Fen [1 ]
Xie, Hao-feng [2 ]
Cui, Lan-yue [1 ]
Kannan, M. bobby [3 ]
Zou, Yu-hong [4 ]
Zeng, Rong-chang [1 ,5 ]
机构：
[1] Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Corros Lab Light Met, Qingdao 266590, Peoples R China
[2] GRINM Grp Co LTD, State Key Lab Nonferrous Met & Proc, Beijing 100088, Peoples R China
[3] Univ Newcastle, Sch Engn, Callaghan, NSW 2308, Australia
[4] Weifang Univ Sci & Technol, Coll Chem & Environm Engn, Weifang 262700, Peoples R China
[5] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450002, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2024年 / 34卷 / 06期
基金：
中国国家自然科学基金;
关键词：
magnesium alloy; oxalic acid; intermetallic compound; steam coating; layered double hydroxide; corrosion resistance; MAGNESIUM ALLOY; SURFACE; AZ31; DEGRADATION; PROTECTION; FILM; BEHAVIOR; OXALATE; IMPROVE; VITRO;
D O I：
10.1016/S1003-6326(24)66511-8
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of oxalic acid (OA) etching on the formation mechanism and corrosion performance of in-situ steam Mg-Al layered double hydroxide (LDH) coatings on AM50 Mg alloy was investigated by exposing the intermetallic compounds (beta-Mg17Al12 and AlMn) on the surface of the alloy. The results demonstrated that the presence of OA led to an increased fraction of intermetallic compounds on the Mg substrate. Mg-Al LDH nucleated and grew around the Al-Mn phase. The best corrosion resistance of LDH coating was obtained with the maximum thickness at a pickling time of 45 s, and the corrosion current density was reduced by three orders of magnitude compared to the substrate. Finally, the formation mechanism of Mg-Al LDH coating on AM50 Mg alloy was proposed.
引用
收藏
页码：1843 / 1863
页数：21
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