Guide 19, Selecting Coatings for Use Over Galvanizing

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This guide assists owners and specifiers to select an appropriate generic coating for protection of galvanized steel surfaces exposed to aggressive environments. Factors to consider when making the selection include characteristics of the service environment, whether the coating will used for spot repair or as a full overcoat, the age and condition of the galvanized layer, and the amount of surface preparation required. Each of these factors may take a different priority in the decision-making process depending upon the requirements of a specific project, which will affect the coating selection.