High corrosion resistance of austenitic stainless steel alloyed with nitrogen in an acid solution |
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| Authors: | M. Metiko&scaron -Hukovi?,R. Babi?,Z. Gruba?,?. Petrovi?,N. Lajç i |
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| Affiliation: | aDepartment of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Savska 16, P.O. Box 177, 100000 Zagreb, Croatia;bDepartment of General and Inorganic Chemistry, Faculty of Chemistry and Technology, University of Split, 21000 Split, Croatia;cFaculty of Mine and Metallurgy, University of Prishtina, 10000 Prishtina, Kosovo |
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| Abstract: | Passivity of austenitic stainless steel containing nitrogen (ASS N25) was investigated in comparison with AISI 316L in deareated acid solution, pH 0.4. A peculiar nature of the passivation peak in a potentiodynamic curve and the kinetic parameters of formation and growth of the oxide film have been discussed. The electronic-semiconducting properties of the passive films have been correlated with their corrosion resistance. Alloying austenitic stainless steel with nitrogen increases its microstructure homogeneity and decreases the concentration of charge carriers, which beneficially affects the protecting and electronic properties of the passive oxide film. |
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| Keywords: | A. Acid solutions A. Stainless steel B. EIS B. TEM B. Cyclic voltammetry C. Passive films |
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