EVALUATION OF CORROSION PROTECTION PERFORMANCE OF COLD SPRAY TECHNOLOGY APPLIED ON ADHERED RUST AT STEEL GIRDER ENDS

Abstract

This study analyzed adherent rust remaining on steel members using Raman spectroscopy and identified magnetite as the primary component, with localized β-FeOOH near the steel surface. When a CS coating was applied over the rust, it demonstrated corrosion resistance comparable to hot-dip galvanizing for up to 160 cycles, and the zinc in the coating was expected to provide electrochemical protection to the steel substrate through anodic reaction.