摘要
利用建立的断电流暂态测量系统和提出的由-t·dV/dt～lg(t)图判断腐蚀体系时间常数个数和弛豫过程类型的判断方法,定性地确定了钝化膜随时间的变化情况。用这项技术连续监测了20~#碳钢和1Cr18Ni9Ti不锈钢的小孔腐蚀破坏过程。
Potential decay after interruption of the current in galvanostatic polarization was measured for passivated metallic electrode during pitting corrosion period by using a transient measurement system established by the authors previously. The number of time-constants of the relaxation processes during different stage of pitting corrosion was investigated based on analysing the decay data by plots of-t. dV/dtvs. lg(t). The experimental results for the systems of passivated mild steel and stainless steel electrodes in Chloride solution are in agreement with that obtained by impedance measurements reported previously.
出处
《腐蚀科学与防护技术》
CAS
CSCD
1992年第3期163-167,共5页
Corrosion Science and Protection Technology
基金
国家自然科学基金资助项目.
关键词
测量技术
钝化膜
时间常数
点蚀
current-interruption
passive film
pitting corrosion
time constant
