The corrosion protection property of the coating consisting of acrylic resin mixed with curcumin and dammar was investigated by immersing in 3% NaCl solution using potential - time measurement. The investigation was performed until corrosion occurred at the coating and substrate interface. As the coating degraded the penetration of electrolyte, the potential value of the coated sample decreases to a value of - 0.65 V. In this study the coating with pigment volume concentration of KC30% can withstand against corrosion by 3% NaCl solution.