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11033 Effect of Coating Formulation on Crack Resistance of Epoxy Coatings

Picture for 11033 Effect of Coating Formulation on Crack Resistance of Epoxy Coatings
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Product Number: 51300-11033-SG
ISBN: 2011 11033 CP
Author: EunHa Song, SungGyun Lee, Holl Lee, and DaeYoung Kim
Publication Date: 2011
$0.00
$20.00
$20.00
The cracking behavior of epoxy coatings applied to ship ballast tanks are affected by the coating elongation and the strain induced by external structural stresses and thermal stresses. In this study, the principal factors controlling the coating intrinsic elongation were investigated. The principal factors were found to be the molecular weight of resin and amide type curing agent. These result in a low crosslink density resin with increase in the mobility and flexibility. The elongation of coatings was found to be affected by the type and particle size of pigments. It was also found that more solvent content in the coatings lead to greater internal stress and might reduce the elongation to break of the coatings.

Key words: coating crack, ballast tank of COT, epoxy coating, flexibility, internal stress, thermal stress, structural stress, pigments, resin structure
The cracking behavior of epoxy coatings applied to ship ballast tanks are affected by the coating elongation and the strain induced by external structural stresses and thermal stresses. In this study, the principal factors controlling the coating intrinsic elongation were investigated. The principal factors were found to be the molecular weight of resin and amide type curing agent. These result in a low crosslink density resin with increase in the mobility and flexibility. The elongation of coatings was found to be affected by the type and particle size of pigments. It was also found that more solvent content in the coatings lead to greater internal stress and might reduce the elongation to break of the coatings.

Key words: coating crack, ballast tank of COT, epoxy coating, flexibility, internal stress, thermal stress, structural stress, pigments, resin structure
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