Perbandingan kekuatan adhesi pelapisan elektroplating dan cat pada baja karbon

Abstract

This research investigates the adhesion strength of two surface protection methods electroplating (copper–nickel–chrome) and epoxy coating with 1, 2, and 3 layers on SS400 carbon steel. The study aims to determine which method provides better adhesion and corrosion resistance. Pull-off adhesion tests based on ASTM D4541 were conducted to evaluate bonding performance. Results indicate that electroplated specimens exhibit higher adhesion strength, with chrome plating reaching up to 2.60 MPa, compared to the maximum 1.48 MPa achieved by three-layer epoxy coatings. Failure mode analysis showed cohesive failures in electroplated samples, indicating strong metallurgical bonding, while epoxy coatings experienced more adhesive failures due to weaker interfacial adhesion. These findings confirm that electroplating provides superior bonding and durability under mechanical stress and corrosive environments. Therefore, electroplating is recommended for applications requiring long-term performance, while epoxy coatings remain a viable option for less aggressive conditions.