Abstract
Effect of curing temperature on corrosion resistance of aluminum sheet coated with epoxy resin using electrodeposition process has been investigated. Corrosion test revealed that weight loss of aluminum sheet in 1wt% NaCl solution (pH3.0, 301K) decreased with an increase of curing temperature. It was found that water absorption of electrodeposition film was independent of an increase of curing temperature. Water permeability and adhesion between film and aluminum sheet, however, increased with an increase of curing temperature. (Water permeability)×(adhesion)-1 was correlated well with corrosion resistance. Corrosion behavior of aluminum sheet coated with epoxy resin is discussed in terms of physical properties of electrodeposition film against water and related with adhesion.
