Five decades spatial hazard maps of atmospheric corrosion predict the rate of deterioration of steel beams in different environments of India

Abstract Steel, an indispensable enduring metal used in all facets of life, contributes significantly to the global economy. Atmospheric corrosion is the inexorable natural degradation of alloys to ores in the presence of the atmosphere. The rate of deterioration is a decisive life factor of environmentally exposed steel, and it is necessary to trace its dynamics in different atmospheres at different exposure times. Spatial hazard corrosion maps for rural and urban conditions have been developed for over five decades to apprehend metal loss or corrosion rate dynamics in diverse conditions (PS11, PS21 and PS31) across the Indian subcontinent. The impact of cumulative hazards on Indian standard structural steels is interpreted to perceive sectional losses of beams in various environments for different zones. Sectional losses are greater in zone 5 of the PS31 environment and are significant in junior and lightweight beams, while heavy beams are relatively unaffected.