Coating Comparison of Painting & Galvanizing
Zinc Coating Damage Corrosion Start
When discontinuity or damage in the zinc coating exposes the underlying steel, the cathodic protection which zinc provides for steel comes into action and ensure that the exposed steel does not corrode.
Paint Coating Damage Corrosion Start
Most organic coatings and paint films depend on their sealing ability and in some cases anti-corrosive inhibitive pigments to protect steel from corrosion. They offer little or no protection to bare steel exposed by failure, damage or discontinuity in the coating film. Corrosion starts and spreads rapidly beneath the coating.

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