辽宁石油化工大学学报2025，Vol.45Issue(6)：68-74,7.DOI:10.12422/j.issn.1672-6952.2025.06.009
弹、塑性应变对X90管线钢腐蚀行为的影响
Effect of Elastic and Plastic Strain on Corrosion Behavior of X90 Pipeline Steel
摘要
Abstract
The effect of elastic and plastic strain on corrosion behavior of X90 pipeline steel in a simulated marine alternating dry/wet environment was investigated by means of slow strain rate tensile test,in-situ electrochemical measurement,scanning electron microscope(SEM)observation and X-ray Diffraction(XRD)test.The results indicate that in the elastic strain regime,the corrosion susceptibility of X90 pipeline steel increases with the enhancement of elastic strain,but the effect is not pronounced.In the plastic strain regime,the corrosion susceptibility of X90 pipeline steel increases significantly with the enhancement of plastic strain.The most severe surface corrosion of X90 pipeline steel occurs at a plastic strain level of 5.5%.It is attributed to the mechano-electrochemical effect of X90 pipeline steel under external stress.The corrosion mechanism is anode dissolution dominated and hydrogen evolution assisted.The result of corrosion product analysis show that strain has no significant effect on the type of corrosion products.关键词
弹性应变/塑性应变/X90管线钢/机械-电化学效应/电化学测试/腐蚀形貌表征Key words
Plastic strain/Elastic strain/X90 pipeline steel/Mechano-electrochemical effect/Electrochemical test/Corrosion morphology characterization分类
能源科技引用本文复制引用
白淞元,孙东旭,吴明..弹、塑性应变对X90管线钢腐蚀行为的影响[J].辽宁石油化工大学学报,2025,45(6):68-74,7.基金项目
国家自然科学基金项目(52274062,52404058). （52274062,52404058）
