Electrochemical characteristics of the dynamic progression of erosion-corrosion under different flow conditions and their effects on corrosion rate calculation

被引:23
|
作者
Xu, Yunze [1 ,2 ]
Liu, Liang [1 ]
Xu, Chenbing [1 ]
Wang, Xiaona [3 ]
Tan, Mike Yongjun [4 ]
Huang, Yi [1 ]
机构
[1] Dalian Univ Technol, Sch Naval Architecture & Ocean Engn, Linggong Rd 2, Dalian 116024, Liaoning, Peoples R China
[2] Dalian Univ Technol, Sch Civil Engn, Dalian 116024, Peoples R China
[3] Dalian Univ Technol, Sch Phys & Optoelect Engn, Dalian 116024, Peoples R China
[4] Deakin Univ, Sch Engn, Geelong, Vic 3216, Australia
基金
中国博士后科学基金;
关键词
Erosion-corrosion; Dynamic progression; Electrochemical parameters; Critical impact energy; CARBON-STEEL; ACCELERATED CORROSION; ENHANCED CORROSION; NACL SOLUTION; SURFACE; RESISTANCE; INITIATION; MECHANISM; VELOCITY; KINETICS;
D O I
10.1007/s10008-020-04795-9
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The erosion-corrosion performance of X65 carbon steel at different flow conditions was electrochemically studied. Results show that the anodic polarization branch would have a significant distortion in the flowing electrolytes, leading to an overestimation of the Stern-Geary coefficient using the traditional Tafel extrapolation. It is found that the critical impact energy for the initiation of erosion-corrosion is around 0.016 mu J. Surface morphology was obviously changed from "flow mark" appearance to continuous craters with the initiation of erosion-corrosion. The results indicate that the synergy of erosion and corrosion is the main factor contributing to the erosion-corrosion damage under active corrosion. The dynamic progression of erosion-corrosion is associated with the propagation of impingement pits at anodic sites and the wear of the corrosion product film at cathodic sites.
引用
收藏
页码:2511 / 2524
页数:14
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