摘要
通过自然浸泡、动电位极化、电化学阻抗谱测量、电偶腐蚀试验研究预应力高强混凝土(PHC)管桩金属端头处端板和主筋在氯盐土、盐碱土、中性草甸土和酸性土模拟液中的腐蚀速率、电化学腐蚀行为以及电偶腐蚀行为。研究结果表明:主筋的耐蚀性能比端板的差,盐渍土中主筋的耐蚀程度差;端板和主筋的阴极过程受氧扩散控制;盐渍土中端板和主筋的锈层不具保护作用;主筋与端板偶接时主筋为阳极,端板为阴极;主筋在酸性土中的电偶腐蚀效应最大,而在草甸土中最小。
The corrosion rate,electrochemical corrosion and galvanic corrosion behaviors of the end plate and the steel bar at metal end of prestressed high-strength concrete（PHC） pipe pile in simulated solutions of chloride salt soil,salina soil,neutral meadow soil and acid soil were investigated by natural immersion tests,potentiodynamic polarization and electrochemical impedance spectroscopy measurements and galvanic corrosion tests.The results show that the corrosion resistance of the end plate is inferior to that of the steel bar,and in saline soil the corrosion resistance grade of the steel bar is poor.The cathodic processes of the end plate and the steel bar in four simulated soil solutions are controlled by oxygen diffusion.The corrosion products on end plate and steel bar immersed in saline soil are hardly protective.Steel bar is anodic and end plate is cathodic when they were coupled and immersed in four solutions.The galvanic corrosion effect of stell bar in acid soil is maximal,while that in neutral meadow soil is minimal.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第2期434-440,共7页
Journal of Central South University:Science and Technology
基金
中国博士后科学基金面上资助项目(20080440043)
中国博士后科学基金特别资助项目(200902107)
关键词
PHC管桩
端板
腐蚀
土壤
电偶腐蚀
PHC pipe pile
end plate
corrosion
soil
galvanic corrosion
