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<p>Materials undergo degradation and structural failure due to corrosion, leading to substantial economic losses in industrial applications. This study investigates the corrosion behavior and mechanical degradation of hot-rolled and cold-rolled mild steel in six different environments (air, tap water, seawater, NaCl, HCl, and H₂SO₄) over a period of 30&#xa0;days. The analysis included weight loss, corrosion rate, thickness reduction, and mechanical strength evaluations at multiple intervals. Results revealed that cold-rolled specimens suffered up to a 55% loss in elongation and a 40% decline in tensile strength, particularly in acidic conditions. The superior performance of hot-rolled steel highlights the influence of manufacturing methods on corrosion resistance. Among all tested environments, sulfuric acid proved to be the most aggressive, with cold-rolled steel specimens exhibiting 10.212&#xa0;mm and 5.649&#xa0;mm of corrosion compared to 9.488&#xa0;mm and 5.577&#xa0;mm for hot-rolled steel specimens during the 30-day exposure period. Sulfuric acid exposure caused a maximum thickness reduction of 38.12%, along with a 40% loss in tensile strength and a 55% reduction in elongation at break for cold-rolled steel. Under the same exposure conditions, the compressive strength of hot-rolled specimens decreased by 25%. This comparative study offers valuable insights for designing durable steel structures and developing advanced corrosion mitigation strategies.</p>

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Corrosion behaviour of mild steel in diverse environments: a comparative study of hot-rolled and cold-rolled specimens

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月24日

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  • Sangeetha Palanivelu,
  • Siva Avudaiappan,
  • Nelson Maureira-Carsalade

摘要

Materials undergo degradation and structural failure due to corrosion, leading to substantial economic losses in industrial applications. This study investigates the corrosion behavior and mechanical degradation of hot-rolled and cold-rolled mild steel in six different environments (air, tap water, seawater, NaCl, HCl, and H₂SO₄) over a period of 30 days. The analysis included weight loss, corrosion rate, thickness reduction, and mechanical strength evaluations at multiple intervals. Results revealed that cold-rolled specimens suffered up to a 55% loss in elongation and a 40% decline in tensile strength, particularly in acidic conditions. The superior performance of hot-rolled steel highlights the influence of manufacturing methods on corrosion resistance. Among all tested environments, sulfuric acid proved to be the most aggressive, with cold-rolled steel specimens exhibiting 10.212 mm and 5.649 mm of corrosion compared to 9.488 mm and 5.577 mm for hot-rolled steel specimens during the 30-day exposure period. Sulfuric acid exposure caused a maximum thickness reduction of 38.12%, along with a 40% loss in tensile strength and a 55% reduction in elongation at break for cold-rolled steel. Under the same exposure conditions, the compressive strength of hot-rolled specimens decreased by 25%. This comparative study offers valuable insights for designing durable steel structures and developing advanced corrosion mitigation strategies.