POTENTIAL'S FLUCTUATION OF RUST PREVENTING OIL FILM DURING ITS DEGRADATION

来源期刊：中南大学学报(英文版)1997年第1期

论文作者：Jiang Hanying Zhong Qingdong Shu Yude

文章页码：9 - 12

Key words：rust preventing oil; electrochemical measurement; wire beam electrode; potentials fluctuation

Abstract: Potential's fluctuation of rust preventing oil film during its degradation was studied using wirebeam electrode. Being non-destructive and simple, potential measurement is a very repetitive method. Other electrochemical testing method, e. g., polarization resistance, can breakdown the integrity of oil coating by DC current; EIS is time consuming. As a special electrochemical sensor, wire beam electrode contains 101wires of mild steel wires, and it is helpful to improve the reproducibility of electrochemical test evidently. Using this electrode, the electrochemical parameters and their distribution which was related to under film corrosion process are measured directly so as to describe potential's fluctuation of rust preventing oil film. It is pointed out that there is potential's fluctuation on rust preventing oil film during its degradation, and this characteristic has direct effect on the self-repairing ability of rust preventing oil film. However, for the uncoated metal electrode and base oil film, there is no such behavior. It is also pointed out that inhibitors in the oil film have direct effect on its self-repairing ability.