Post-Fire Analysis of Thermally Sprayed Coatings: Evaluating Microstructure, Mechanical Integrity, and Corrosion Behavior

This paper examines the impact of fire on microstructural, mechanical, and corrosion behavior wire-arc-sprayed zinc, aluminum, Zn-Al pseudo-alloy coatings. Steel plates coated with these materials were subjected to temperatures in increments 100 °C, starting from 300 °C progressing until failure. Microstructural characterization, microhardness, abrasion resistance, electrochemical impedance studies performed post-fire The findings this study show that heat had a positive performance zinc coatings when they exposed up 400 while aluminum maintain their 600 °C. However, above temperatures, effectiveness was observed decline, due increased high-temperature oxidation, porosity, addition decreased protection performance. Based study, appropriately sealed thermal-spray-coated steel components can be reused after exposure specific temperature depending coating material.