Abstract
The effect of two important parameters of stress corrosion cracking, namely, stress and impressed current, on tarnish formation on brass in ammoniacal copper sulphate solution has been investigated. The impressed current produces a maximum in film thickness on the anodic side which has been explained on the basis of different reactions of CU2O formation. Applied stress has been found to favour film formation up to a stress level equal to the proof stress of the metal.
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