静载荷对30CrMnSiA在中性及酸性溶液中腐蚀速度的影响  

INFLUENCE OF STATIC LOAD ON CORROSION RATE OF 30CrMnSiA STEEL IN NEUTRAL AND ACIDIC SOLUTIONS

作　　者：王景茹[1] 朱立群[2] 张峥[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京航空航天大学材料科学与工程学院,北京100083

出　　处：《腐蚀科学与防护技术》2008年第4期253-256,共4页Corrosion Science and Protection Technology

基　　金：国家重点基础研究发展规划(G1999065010)资助项目

摘　　要：用电化学测量技术通过加载时30CrMnSiA在中性溶液中自腐蚀电位和阳极极化曲线负移,及在酸性溶液中电化学阻抗谱的不同变化,研究了静载荷对腐蚀速度的影响.并提出外力是否影响腐蚀速度,应视腐蚀的控制步骤而定的观点.结果表明,当腐蚀体系阴阳极都为活化控制时,外力增加腐蚀速度;当腐蚀体系控制步骤为扩散控制时,外力不影响腐蚀速度;对吸氧腐蚀而言,在外力较大时,还需考虑外力是否导致阴极控制过程的转变.The influence of static load on corrosion rate of 30CrMnSiA steel was investigated through variations of free corrosion potential, anodic polarization curve and electrochemical impedance spectroscopy as the static load increased. The experimental results indicated that the influence of the static load on corrosion rate depended on the control steps of corrosion process. When both of the cathodic and anodic processes are activation control, the corrosion rate increased with the applied stress. When the control step of system is diffusion, its corrosion rate could not be affected by the applied stress. When the tensile stress is big enough,it might cause a transition from cathodic control into oxygen-consumption control.

关 键 词：腐蚀 力学化学 电化学阻抗谱 控制步骤 

分 类 号：TG172.9[金属学及工艺—金属表面处理]