Corrosion Mechanisms of Painted Metals

The corrosion mechanisms of painted metal will be discussed.  Key topics covered include: (a) the electrochemical aspects of corrosion, including cathodic and anodic reactions; (b) the electromotive series; (c) the forms of corrosion that are relevant to painted metal, namely galvanic corrosion, crevice corrosion, and filiform corrosion; (d) mechanistic characterization of paint blistering, and cathodic and anodic delamination of paint films; and (e) the key points to control corrosion of painted metals.  Specific examples of how innovative nanocomposite coatings can effectively counteract these corrosion mechanisms to improve corrosion resistance of various metallic substrates will also be presented.