A Staining and/or colour change due to deterioration of the coating (other than that of obvious basemetal corrosion products)B Dulling with little or no visible corrosion of coatingC Corrosion products from anodic coatingsD Corrosion products from cathodic coatingsE Surface pitting (corrosion pits probably not extending through to the base metal)F Flaking, peeling, spallingG BlisteringH CrackingI CrazingJ Crow’s feet or star-shaped defects