돌리를 이용한 도막 부착력 시험의 영향 인자에 관한 연구
A study on affecting factors by using dolly in coating adhesion test
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초록
Establishment of adhesion strength measurement procedure for marine epoxy coatings was conducted inorder to ensure reliability of the test results. It was found that (1) the increase in thickness of the substrateswould induce increase of pull-off strength. Especially, the increase in adhesion strength with the substratethickness increment was attributed to the transition of stress mode to the pure tensile mode excluding bendingeffect. (2) The longer curing time, the higher pull-off strength. It may be due to higher cross-linking densityof the coating (3) The pull-off strength increases as coating thickness increases due to the diminishmentof bending effect (4) The longer drying time after water immersion, the higher pull-off strength. It maybe due to the evaporation of water molecule at the coating-substrate interface.
Abstract
Establishment of adhesion strength measurement procedure for marine epoxy coatings was conducted inorder to ensure reliability of the test results. It was found that (1) the increase in thickness of the substrateswould induce increase of pull-off strength. Especially, the increase in adhesion strength with the substratethickness increment was attributed to the transition of stress mode to the pure tensile mode excluding bendingeffect. (2) The longer curing time, the higher pull-off strength. It may be due to higher cross-linking densityof the coating (3) The pull-off strength increases as coating thickness increases due to the diminishmentof bending effect (4) The longer drying time after water immersion, the higher pull-off strength. It maybe due to the evaporation of water molecule at the coating-substrate interface.
참고문헌 (9)
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- "ISO4624, Paints and Varnishes--Pull-off Test for Adhesion", ISO Standards, ~ (2002)
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- "ASTM D870, Standard test method for water resistance of coatings using water immersion", ASTM International, ~ (2002)