Data on the comparative assessment of corrosion resistance of 2101 duplex and 410 martensitic stainless steel for application in petrochemical crude distillation system

The corrosion resistance of 2101 lean duplex stainless steel and 410 martensitic stainless steel were studied and compared in 1M – 6M H₂SO₄ solution by coupon measurement for application in extreme process environments. Data obtained showed 2101 duplex steel is significantly more resistant to corrosion at lower concentrations (1M and 2 M H₂SO₄ solution) of the acid solution with final corrosion rate values of 0.000010 mm/y and 0.00028 mm/y compared to the values obtained for 410 martensitic steel at 0.0019 mm/y and 0.0738 mm/y. H₂SO₄ concentration at 4M - 6M narrowed the margin between the corrosion rates of both steel with final values of 0.0235 mm/y, 0.0326 mm/y and 0.0459 mm/y for 2101 duplex steel, and 0.0479 mm/y, 0.0482 mm/y and 0.0511 mm/y for 410 martensitic steel which signifies the corrosion resistance of both steels are comparable and generally similar at higher concentrations of SO₄²⁻ anions. Statistical analysis through analysis of variance shows H2SO4 concentration strongly influence the corrosion rate value of both steel compared to exposure time which has limited influence.