Abstract
Anodic dissolution of iron in unbuffered neutral chloride solutions has been investigated by transient polarization techniques. A new method to correct for the ohmic potential drop has been proposed. It has been observed that the anodic Tafel slopes were 40 mV/decade for fast polarization and 80 mV/decade for slow or steady‐state polarization. Steady‐state anodic characteristics of iron have been studied by superimposing short cathodic potential and current pulses. At steady‐state anodic polarization a Tafel relation was obtained between the cathodic potential (φC) and the cathodic current (iC) with a Tafel slope of about 120 mV/decade for both potentiostatic and galvano‐static pulses. The difference in anodic Tafel slopes has been interpreted in terms of the formation of a hydroxochloro‐iron complex, . The cathodic pulse polarization results indicate that .
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