Unveiling the potential of electric-arc sprayed aluminum bronze coatings on 316L stainless steel for high-temperature environments

Abstract

This study aims to determine the safe working temperature of aluminum bronze coatings on stainless steel by investigating their dry oxidation behavior at various temperatures. Aluminum bronze was deposited onto 316L stainless steel substrates using an electric-arc spray coating, followed by heat treatment at temperatures ranging from 300 to 800 °C. SEM and EDX analysis revealed that the aluminum bronze coating can safely operate up to approximately 800 °C. Given that boilers made from 316L stainless steel typically operate within the 500 to 700 °C temperature range, they are prone to wear and corrosion. Applying aluminum bronze coatings can mitigate these issues, enhancing corrosion resistance, thus extending the service life of the boilers.