AC Impedance Characteristics of Coated Steel by Corrosion-Degradation
paint film resistance
Degradation aspect of paint film about corroded coated steel under the different environments is examined by tensile adhesive test and AC impedance method. The results obtained are as follows. (1) Degradation aspect of paint film for coated steel is able to be concretely assessmented by mesurement of tensile adhesive and impedance diagram. (2) Degradation of paint film appears in the earlier stage and more remarkable spray test than salt immersion test is confirmed by mesurment of paint film resistance R?. (3) Value of R? for place zone (valley，residential area，seaside) of coated steel does not recognize a distinct difference though one year and a month has passed.
Departmental Bulletin Paper