Non-destructive evaluation of subsurface corrosion on hot steel angle sections embedded in concrete and its repair by cement slurry and nitozinc coating

Abstract

This research article presents a comprehensive investigation into the materials and corrosion resistance of angle components critical to infrastructure construction. The study focuses on two key angle materials: steel angles and Fiber-Reinforced Plastic (FRP) angles, selected based on project-specific requirements. The concrete mix design, incorporating crucial components like chemicals (Calcium Chloride, Sodium Hydroxide, Calcium Hydroxide), aggregates (M Sand and 20 mm Aggregate), and cement (Portland Pozzolana Cement - 43 grade), ensures that the structural integrity and performance meet desired standards. The research also involves advanced corrosion assessment techniques, including the Half-Cell Potential Test and the Applied Voltage Test (Holiday Test), which offer insights into material conductance, corrosion resistance, and protective coating integrity. Moreover, a Chemical Resistance Test examines the impact of various solutions on these materials, highlighting their suitability for diverse industrial applications. The results underscore the importance of tailored material selection, proactive corrosion management, and the critical role of protective coatings in ensuring infrastructure longevity and safety. This study contributes to the advancement of corrosion assessment methods, supporting the durability of critical infrastructure materials.