Why Coatings Fail

Tubular or box shapes should be used whenever possible to minimize edges and inside corners. If possible, the metallic materials selected should have the best resistance to corrosive attack or be alloyed to enhance coatings performance. A particular attention to design should be made to minimize the dwelling time of atmospheric condensation and provide special attention to surfaces shaded from the sun [5]. Large enclosed spaces that have not been totally sealed, such as the insides of box girders, should be coated, or ventilated, with fans if necessary. Decisions on coatings should not be left to the casual attention of inexperienced personnel. It is quite clear that 

Decisions concerning effective protective coatings can be made properly only by experienced personnel. 

The economic consequences of poor coating practices can be disastrous. 

The number of coating materials available necessitates careful study if a proper material is to be selected. 

Proper surface preparation is a prime economic factor for coatings in any environment. 

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