Electrochemical corrosion behavior of platinum-coated lanthanum doped titanium-zirconium-molybdenum alloy

被引：7

作者：

Hu, Ping ^{[1
,2
]}

Song, Rui ^{[1
]}

Deng, Jie ^{[1
]}

Chen, Zhen-yu ^{[1
]}

Li, Qin-wei ^{[1
]}

Hu, Bo-liang ^{[1
]}

Wang, Kuai-she ^{[1
]}

Cao, Wei-cheng ^{[3
]}

Liu, Dong-xin ^{[3
]}

Yu, Hai-liang ^{[4
]}

机构：

[1] Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Peoples R China

[2] Shaanxi Engn Technol Res Ctr Wear Resistant Mat, Xian 710055, Peoples R China

[3] Jinduicheng Molybdenum Co Ltd, Xian 710068, Peoples R China

[4] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 706卷

关键词：

Pt coating; La doped; La-TZM alloy; Polarization curves; Electrochemical corrosion; LA-TZM ALLOY; HIGH-TEMPERATURE OXIDATION; RECRYSTALLIZATION BEHAVIOR; MICROSTRUCTURE; PERFORMANCE; COATINGS; GRAPHITE; FRACTURE; EROSION; CARBON;

D O I：

10.1016/j.jallcom.2017.02.259

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electrochemical corrosion behavior of platinum coated (Pt-coated) lanthanum doped titanium-zirconium-molybdenum alloy (La-TZM alloy) was studied in this paper. La-TZM alloy plates were fabricated using powder metallurgy and rolling technique, and platinum was coated on their surfaces by using electroplating. Corrosion behavior of Pt-coated La-TZM alloy samples were investigated in neutral and alkaline medium while the Cl concentrations keep invariant, which was quantitatively analyzed using potentiodynamic polarization, scanning electron microscope and energy spectrum techniques. Results show that the Pt-coating can improve the corrosion resistance of the La-TZM alloy. Pt-coating on La-TZM alloy can effectively hinder the matrix alloy electrochemical corrosion during different corrosion mediums. In addition, the Pt-coating on La-TZM alloy in a neutral medium is more corrosion resistant than that in an alkaline medium. Pt-coating can effectively hinder the Cl- destroys the corrosion formed on the surface passivation film, OH- and Cl- double erosion promoted La-TZM alloy intergranular corrosion increased during the electrochemical corrosion processes. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：305 / 311

页数：7