Journal of Adhesion Science and Technology · 1989 · 28 citations · 6 references
Natural SciencesMaterials EngineeringMaterials ScienceCorrosion ScienceMetallic MaterialsMetallurgyAtmospheric CorrosionCoatingsCorrosion EngineeringCorrosion MechanismsCorrosion Of SteelsCorrosion TestingAtmospheric Corrosion MechanismsAtmospheric Galvanic CorrosionCorrosion DamageCorrosion Of CoatingsCorrosion Of Galvanized SteelCorrosion ProductsDelaminationSteels
—The mechanism of corrosion-induced paint delamination of electrocoated electrogalvanized and hot-dip galvanized automotive steels has been investigated. The materials were phosphated and electrocoated but not topcoated. The scribed panels were exposed to atmospheric conditions for 15 months. Two distinct regions were observed in cross-sectioned samples: a delamination zone without corrosion products which preceded a zone where the coating forms corrosion products, which consist largely of ZnO/Zn(OH)2. The mechanism of delamination is postulated to be mechanical in nature.
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