Quadra-Statistical Modeling Of Corrosion Penetration Rate (CPR) Of Martensitic and Annealed Stainless Steel in H2SO4 and HCl.

Abstract

A lucid quadratic model graphs and equations has been successfully generated after corrosion characterization behavior analysis of cast stainless steel (70.90% Fe, 19% Cr 10%Ni, 0.08% C) alloys in (0.25M- 0.5M) H₂SO₄ and (0.25M- 0.5M) HCl using SPSS computer software. The cast stainless steel specimen were sectioned into three sets labeled M, A, U and machined to the same cross sectional area. M and A were subjected to a temperature of 900^oC (1173K or 1652^oF) where the grains formed austenitic phase which was further heat-treated to form martensitic stainless steel (M) and annealed stainless steel (A) test coupons respectively. Then, (U) was left untreated as a control test coupon sample. These pre-weighed test coupon samples were immersed in 0.25M and 0.5M simulated tetraoxosulphate (vi) acid (H₂SO₄) and Hydrochloric acid (HCl) respectively. The........