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2018, vol. 59, iss. 1, pp. 92-99
Formation and growth of pits on X5CrNi18-10 austenitic stainless steel in presence of chlorides and sulphates
aUniversity of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM
bUniversity of Belgrade, Faculty of Mechanical Engineering, Innovation Center
cMetalurški Institut, 'Kemal Kapetanović', Zenica, Bosna i Hercegovina
Investigation and Optimization of the Technological and Functional Performance of the Ventilation Mill in the Thermal Power Plant Kostolac B (MESTD - 34028)
Development of covering and core production technology based on local raw materials for manufacturing of special coated electrodes designed for steel arc welding (MESTD - 34016)

Keywords: stainless steels; pitting corrosion; potentiodynamic polarization method; statistical analysis
The resistance of X5CrNi18-10 stainless steel to pitting corrosion in a solution containing chlorides and sulphates was tested using the potentiodynamic polarization method. The obtained results show that the stainless steel is significantly resistant to pit formation, but it is susceptible to pit growth and crevice corrosion. Pits formed at the corrosion potential grow continuously. Statistical analysis of the results obtained during pitting corrosion testing was performed. It can be assumed with a probability of 95% that values of indicators of resistance to pit formation (the pitting potential Epit, the metastable pitting potential Empit and the difference Epit-Ekor) will be within the range of several percents. Values of indicators of resistance to pit growth (the amount of charge required for the pit growth q, the protective potential Eprot and the difference Epit-Eprot) will be within the broader range. In addition, the appearance of pits on the surface of the stainless steel, as well as the appearance of the pits bottom, were analyzed. It was shown that the structure of the stainless steel tested was not sensitized to pitting and intergranular corrosion, which means that the stainless steel was not previously thermally treated.
*** Standard test method for conducting cyclic potentiodynamic polarization measurements for localized corrosion susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys - ASTM G61
*** Standard Guide for Applying Statistics to Analysis of Corrosion Data - ASTM G16
*** Standard Guide for Examination and Evaluation of Pitting Corrosion - ASTM G46
*** Methods of accelerated tests for resistance to pitting corrosion: GOST 9.912
*** Method of measuring the pitting potential for stainless steels by potentiodynamic control in sodium chloride solution: ISO 15158
*** Standard test method for conducting cyclic potentiodynamic polarization measurements to determine the corrosion susceptibility of small implant devices - ASTM F2129
*** Electrochemical potentiokinetic reactivation measurement using the double loop method (based on Čihal’s method): ISO 12732
Bethencourt, M., Botana, F.J., Calvino, J.J., Marcos, M. (1998) Lanthanide compounds as environmentally-friendly corrosion inhibitors of aluminium alloys: a review. Corrosion Science, 40(11): 1803-1819
Chiba, A., Muto, I., Sugawara, Y., Hara, N. (2013) Pit Initiation Mechanism at MnS Inclusions in Stainless Steel: Synergistic Effect of Elemental Sulfur and Chloride Ions. Journal of the Electrochemical Society, 160(10): C511-C520
Corlett, N., Eiselstein, L.E., Budiansky, N. (2010) Crevice Corrosion. in: Shreir's Corrosion, Elsevier BV, str. 753-771
Frenkel, G.S. (1998) Pitting corrosion of metals: A review of the critical factors. J Electrochem. Soc, vol. 145, br. 6, June str. 2186-2198
Galvele, J.R. (1976) Transport Processes and the Mechanism of Pitting of Metals. Journal of The Electrochemical Society, 123(4): 464
Ida, N., Muto, I., Sugawara, Y., Hara, N. (2017) Local Electrochemistry and In Situ Microscopy of Pitting at Sensitized Grain Boundary of Type 304 Stainless Steel in NaCl Solution. Journal of The Electrochemical Society, 164(13): C779-C787
Jegdic, B., Bobic, B., Bosnjakov, M., Alic, B. (2017) Testing of Intergranular and Pitting Corrosion in Sensitized Welded Joints of Austenitic Stainless Steel. Metallurgical and Materials Engineering (Ranije: Metalurgija - MJoM), vol. 23, br. 2, str. 109-117
Jegdić, B., Bobić, B., Nedeljković, D., Alić, B. (2017) Uticaj jačine struje zavarivanja na otpornost prema piting koroziji zavarenog spoja nerđajućeg čelika X5CrNi18-10. Zaštita materijala, vol. 58, br. 3, str. 297-303
Jones, B.P. (2003) Statistics for the corrosionist. in: Corrosion: Fundamentals, testing, and protection, Vol 13A: ASM Handbook, ASM International, 972-979
Ke, R. (1995) Initiation of Corrosion Pits at Inclusions on 304 Stainless Steel. Journal of The Electrochemical Society, 142(12): 4056
Laycock, P.J. (1990) Extrapolation of Extreme Pit Depths in Space and Time. Journal of The Electrochemical Society, 137(1): 64
Laycock, P.J., Scarf, P.A. (1993) Exceedances, extremes, extrapolation and order statistics for pits, pitting and other localized corrosion phenomena. Corrosion Science, 35(1-4): 135-145
Mikhailov, A.S., Wu, B., Scully, J.R., Hudson, J.L. (1997) Cooperative stochastic behavior in localized corrosion II. experiment. J Electrochem Soc, 144, 1620-1629
Seys, A.A., Brabers, M.J., van Haute, A.A. (1974) Analysis of the Influence of Hydrogen on Pitting Corrosion and Stress Corrosion of Austenitic Stainless Steel in Chloride Environment. Corrosion, 30(2): 47-52
Soltis, J. (2015) Passivity breakdown, pit initiation and propagation of pits in metallic materials - Review. Corrosion Science, 90: 5-22
Stansbury, E.E., Buchanan, R.A. (2004) Fundamentals of electrochemical corrosion. Ohio: ASM International, Materials Park
Suzuki, T., Yamabe, M., Kitamura, Y. (1973) Composition of Anolyte Within Pit Anode of Austenitic Stainless Steels in Chloride Solution. Corrosion, 29(1): 18-22
Tang, Y., Zuo, Y., Wang, J., Zhao, X., Niu, B., Lin, B. (2014) The metastable pitting potential and its relation to the pitting potential for four materials in chloride solutions. Corrosion Science, 80: 111-119
Wilde, B.E., Williams, E. (1971) The use of current/voltage curves for the study of localized corrosion and passivity breakdown on stainless steels in chloride media. Electrochimica Acta, 16(11): 1971-1985
Wilde, B.E., Williams, E. (1971) The Relevance of Accelerated Electrochemical Pitting Tests to the Long-Term Pitting and Crevice Corrosion Behavior of Stainless Steels in Marine Environments. Journal of The Electrochemical Society, 118(7): 1057
Williams, D.E. (1985) Stochastic Models of Pitting Corrosion of Stainless Steels. Journal of The Electrochemical Society, 132(8): 1804