Table 1. Chemical composition of 304L stainless steel (in mass %). C Mn P S Al Cr Mo Ni Cu Fe 0.017 0.41 1.75 0.032 0.0050 0.0049 17.65 0.25 8.59 0.45 Balance Table 2. Summary of the electrochemical parameters obtained from the polarization results in the 3.5% NaCl solution. Ecorr (V vs Icorr Sample Bc (V/dec) Ba (V/dec) Ag/AgCl/KCl sat) -0.690 3.97×10-6 0.331 0.243 Bare SS 304 A -0.414 2.304×10-8 0.264 0.103 B -0.389 4.481×10-8 0.297 0.1 C -0.427 5.101×10-7 0.315 0.101 Table 3. Parameters obtained from data fitting of 304L coated with silica hybrid coating (sample A) and Ce-doped silica hybrid coating (sample B) after 22 days of immersion in a 3.5% NaCl solution. Sample Rs cm2) nc cm2) CPEdo nd Rt cm2) (Ω CPEC (Ω-1cm-2sn) Rpo (Ω (Ω-1cm-2sn) (Ω A 22.59 1.4245×10-5 0.83983 3.6751×105 - - - 22.59 2.6192×10-6 0.82889 7.4422×105 1.238×10-6 0.50668 6.4913×106 B
Table 1. Chemical composition of 304L stainless steel (in mass %). C Mn P S Al Cr Mo Ni Cu Fe 0.017 0.41 1.75 0.032 0.0050 0.0049 17.65 0.25 8.59 0.45 Balance Table 2. Summary of the electrochemical parameters obtained from the polarization results in the 3.5% NaCl solution. Sample Ecorr (V vs Ag/AgCl/KCl sat) Icorr Bc (V/dec) Ba (V/dec) Bare SS 304 -0.690 3.97×10-6 0.331 0.243 A -0.414 2.304×10-8 0.264 0.103 B -0.389 4.481×10-8 0.297 0.1 C -0.427 5.101×10-7 0.315 0.101 Table 3. Parameters obtained from data fitting of 304L coated with silica hybrid coating (sample A) and Ce-doped silica hybrid coating (sample B) after 22 days of immersion in a 3.5% NaCl solution. Sample Rs (Ω cm2) CPEC (Ω-1cm-2sn) nc Rpo (Ω cm2) CPEdo (Ω-1cm-2sn) nd Rt (Ω cm2) A 22.59 1.4245×10-5 0.83983 3.6751×105 - - - B 22.59 2.6192×10-6 0.82889 7.4422×105 1.238×10-6 0.50668 6.4913×106