Small amounts of anodic metals-containing products were
formed on the surface of cathodic metals after galvanic corrosion
measurements, probably due to the fact that the dissolved Cr or Fe
ions can diffuse toward the cathode to be reduced partly. This
deposition reaction may reduce the potential difference between
two metals, and thus weaken the galvanic process to a certain
extent. However, the galvanic corrosion process can also be
facilitated by the dissolved Cr or Fe ions which could be
multivalent (Cr2+/Cr3+, Fe2+/Fe3+) and be involved in the oxidation