Understanding the effect of fluoride on corrosion behavior of pure titanium in different acids

被引：67

作者：

Li, Xiaoqi ^{[1
]}

Wang, Liwei ^{[1
]}

Fan, Lin ^{[2
]}

Zhong, Mingyuan ^{[3
]}

Cheng, Lianjun ^{[1
]}

Cui, Zhongyu ^{[3
]}

机构：

[1] Qingdao Univ, Coll Mech & Elect Engn, Qingdao 266071, Peoples R China

[2] Luoyang Ship Mat Res Inst LSMRI, State Key Lab Marine Corros & Protect, Qingdao 266237, Peoples R China

[3] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China

来源：

CORROSION SCIENCE | 2021年 / 192卷 / 192期

关键词：

titanium; EIS; acid corrosion; kinetic parameters; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; HYDROGEN EVOLUTION; CHLORIDE SOLUTION; SURFACE-ANALYSIS; STAINLESS-STEEL; ALLOY; KINETICS; OXYGEN; RESISTANCE; REDUCTION;

D O I：

10.1016/j.corsci.2021.109812

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion behavior of pure titanium in H2SO4, HCl and HNO3 with different concentrations of F- was studied with electrochemical testing and morphology observation. The threshold F- concentration triggering severe corrosion is between 0.0005 and 0.001 M in the three acids. The F- promotes anodic dissolution and inhibits oxygen reduction, resulting in the decrease of cathodic current density. The corrosion process presents a two-step reaction mechanism, and the influence mechanism of fluoride in different acids is different. The oxidizing nitrate participates in the corrosion reaction as an oxidant and accelerates the corrosion, resulting in the most severe corrosion in fluoride-bearing HNO3.

引用

页数：16