Effects Of Anodic Protection On SCC Behavior Of X80 Pipeline Steel In High-pH Carbonate-Bicarbonate Solution

Archives of Metallurgy and Materials

Y. Zou¹  Z.D. Zou¹  D.X. Xia³  W. Zhao³ 

[1] PROCESSING OF MATERIALS MINISTRY OF EDUCATION, SHANDONG UNIVERSITY, JINAN, CHINA;STEEL COMPANY, LIMITED, JINAN, CHINA;KEY LABORATORY FOR LIQUID-SOLID STRUCTURAL EVOLUTION &TECHNOLOGY CENTER, JINAN IRON &

关键词: Keywords: X80 pipeline steel;    stress corrosion cracking;    high-pH solution;    anodic protection;   

DOI  :  10.1515/amm-2015-0251

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The potentiodynamic polarization test and slow strain rate tensile tests of X80 pipeline steel were performed in 0.5M Na2CO3-1M NaHCO3 solution to study the electrochemical and stress corrosion cracking properties. The results of potentiodynamic polarization test show that there is an obvious stable passive region, about from 0v to 0.8V (SCE), indicating that anodic protection is feasible. The results of slow strain rate tensile tests show that the stress corrosion cracking sensibility is high and cathodic protection effect is restricted due to the hydrogen permeation. However, the elongation, yielding strength and tensile strength all increase with anodic protection. The higher anodic protection potential in the stable passive region is benefit to improve tensile strength and yielding strength. However, the higher elongation is obtained at 0.5V (SCE) anodic protection potential.

【 授权许可】

Unknown