Title:
Mechanical Degradation of Ferritic Stainless Steel (410L) Reinforcing Bar due to Corrosion (Prepublished)
Author(s):
Ankit Kumar Jaiswal and Sangeeta Gadve
Publication:
Materials Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
accelerated corrosion; corrosion; experimentation; mechanical properties; stainless steel reinforcing bar; tensile test
DOI:
10.14359/51744377
Date:
11/22/2024
Abstract:
Corrosion of carbon steel reinforcement in marine environments is a significant problem, prompting the use of materials with higher corrosion resistance, such as stainless steel (SS). Despite stainless steels superior durability, especially in aggressive environments like marine structures, it remains vulnerable to localized pitting corrosion, which can be more detrimental than the corrosion observed in carbon steel. The scientific challenge addressed in this study is the lack of extensive research on the degradation of mechanical properties in corroded stainless steel rebar (SSR). The novelty of this research lies in its focus on ferritic stainless-steel rebar (SS410L) and the detailed quantification of the relationship between corrosion-induced mass loss and mechanical strength deterioration. An experimental investigation was conducted to assess the impact of different corrosion levels (5, 10, and 20% mass loss) induced using an accelerated impressed current technique. Tensile tests on both uncorroded and corroded samples provided insights into the reduction of yield load, ultimate load, and elongation. The results revealed that for mass loss percentages of 3.73, 10.72, and 23.76%, there was a corresponding reduction in yield load of 6.21, 29.09, and 46.56%; ultimate load reductions were 3.43, 23.91, and 42.69%; and elongation decreased by 19.45, 31.28, and 41.52%, respectively. This study also proposes regression models to predict mechanical property degradation and establishes a relationship between percentage mass loss and cross-sectional area loss, highlighting the severe effect of pitting corrosion on mechanical properties based on experimental results.