PENGARUH PREMATUR CURING CURING DAN PERSIAPAN LOGAM BAJA CARBON TERHADAP DAYA ADHESI PADA PENGAPLIKASIAN MULTILAYER COAT EPOXY DAN POLYURETHANE

Carbon steel is a material that has a main composition of iron, making it susceptible to corrosion when exposed to the environment. The reactive nature of iron makes the steel structure quickly degrade, especially when dealing with corrosive environments that have high levels of NaCl in the air such as in offshore areas or in coastal areas. To anticipate the degradation that occurs in steel, prevention is generally carried out by coating the steel with a polymer layer that functions as a barrier so that the steel does not experience direct contact with the environment. This study aims to qualitatively analyze the Pull-off test of epoxy coating system based on the dolly face characteristics which shows that the surface preparation avoids the failure of the primary coating. Proving that Pull�off test of epoxy coating system based on dolly face characteristics shows that curing time reduces the failure rate between layers, quantitative performance of Pull-off test of epoxy coating system based on pull-off strength value of samples with prepared and unprepared surfaces is directly proportional to curing time of primary layer, and proving Degree of Cure of epoxy coating system based on quantitative analysis of crosslinking amine groups is directly proportional to curing time of primary layer.