to progressive destruction of the coating by blistering and scale and the
enlargement of the corroding surface. In the case of most metallic coatings,
small pin hole faults in the coatings cause intensified pitting and
progressive destruction of the coating and the substrate by galvanic attack.
The use of coatings, particularly inert metallic coatings, is not a
recommended procedure to be used alone to prevent corrosion in long-time
exposure situations. Regular and frequent inspection and maintenance
practices are necessary to protect the coatings employed.