Abstract:The mechanism of corrosion inhibition of Mannich-modified phenolic resin coating which is one of the alternatives to chromate conversion coating on the electrogalvanized steel sheet was investigated by cross-section analysis and electrochemical measurements of the coating film. The 200ºC cured coating film which has good corrosion inhibition has the higher charge transfer resistance (R ct) and the higher film resistance (R f) calculated by electrochemical impedance measurement than the 80 ºC cured coating film… Show more
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