Metallurgical Engineering > GATE 2021 > Corrosion
At 25oC iron corrodes in a deaerated acid of pH 3 with a corrosion current density of 4 µA cm-2. The corrosion potential (V) is: _______ (round off to 2 decimal places).
Given: βc = 0.1 V per decade of current density Exchange current density of hydrogen on iron surface = 10-9 A cm-2 R = 8.314 J mol-1K-1 F = 96500 C mol-1
All potentials are with reference to standard hydrogen electrode.
Given: βc = 0.1 V per decade of current density Exchange current density of hydrogen on iron surface = 10-9 A cm-2 R = 8.314 J mol-1K-1 F = 96500 C mol-1
All potentials are with reference to standard hydrogen electrode.
Correct : -0.55
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