ELECTROCHEMICAL NOISE OF 7075 ALUMINUM ALLOY DURING A SIMULATED ATMOSPHERIC CORROSION PROCESS
电化学噪声表征7075铝合金的模拟大气腐蚀过程

Lens tissue absorbing 3.5 % sodium chloride solution was clung on the surface of sample to simulate atmospheric corrosion. The corrosion current, potential fluctuations of 7075T6 aluminum alloys were measured. It has been observed that amplitude of current fluctuations was rather low in initial corrosion stages. Current fluctuations presented positive zigzag wave after 2 h corrosion, and current showed negative various fluctuations after 6 h. It was possible that breakdown of passive film was the main process after 2 h corrosion, whereas repair of the passive film was dominant after 6 h.