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Overcoating, Do You or Don’t You

Overcoating, Do You or Don’t Yo
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This paper will address conditions assessment, test procedures and criteria necessary to make informed decisions on overcoating or not overcoating an aged coating system. It will cover rating of adhesion and film integrity, determination of overcoating risk factors and a selection process for appropriate overcoat systems.

Product Number: 41208-400-SG
Author: Mark F Bollinger
Publication Date: 2008
Industry: Coatings
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$20.00
$20.00

Whether or not overcoating is a feasible alternative to complete removal and repainting depends a great deal on the condition of the existing coating system. The amount of corrosion present, number of coats, total film thickness, adhesion to the substrate, adhesion between coats, and exposure conditions are all factors to consider before making an overcoat or complete removal decision. Due to the economic costs associated with complete removal of aged existing coating systems, including coatings which may or may not contain lead or other hazardous materials, overcoating can offer an economical advantage. However, there are risks involved with overcoating which can lead to costly failures. Properly assessing the condition of existing coatings can help ensure the proper decision is made.  This paper will address conditions assessment, test procedures and criteria necessary to make informed decisions on overcoating or not overcoating an aged coating system. It will cover rating of adhesion and film integrity, determination of overcoating risk factors and a selection process for appropriate overcoat systems.

Whether or not overcoating is a feasible alternative to complete removal and repainting depends a great deal on the condition of the existing coating system. The amount of corrosion present, number of coats, total film thickness, adhesion to the substrate, adhesion between coats, and exposure conditions are all factors to consider before making an overcoat or complete removal decision. Due to the economic costs associated with complete removal of aged existing coating systems, including coatings which may or may not contain lead or other hazardous materials, overcoating can offer an economical advantage. However, there are risks involved with overcoating which can lead to costly failures. Properly assessing the condition of existing coatings can help ensure the proper decision is made.  This paper will address conditions assessment, test procedures and criteria necessary to make informed decisions on overcoating or not overcoating an aged coating system. It will cover rating of adhesion and film integrity, determination of overcoating risk factors and a selection process for appropriate overcoat systems.

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