Dependence of critical pitting temperature on the concentration of sulphate ion in chloride-containing solutions
作者： Bo Deng , Yiming Jiang , Jiaxing Liao , Yunwei Hao , Cheng Zhong
DOI: 10.1016/J.APSUSC.2007.03.034
关键词: Analytical chemistry 、 Scanning electron microscope 、 Chemistry 、 Adsorption 、 Metallurgy 、 Electric charge 、 Chloride 、 Ion 、 Pitting corrosion 、 Sulphate Ion
摘要: Abstract Effects of varying concentration sulphate (SO 4 2− ) ion on the pitting behavior 316SS have been investigated using potentiostatic critical temperature (CPT) measurements, current transient technique and scanning electron microscopy in NaCl solution containing 0.5% Cl − ions. The results demonstrated that when SO is less than 0.42%, CPT surprisingly lower without ion, showing an accelerating effect pit initiation, which different from traditional concept. As increases beyond higher displaying inhibiting initiation. Based above results, a qualitative model proposed to explain initiation mechanism ions-competitive adsorption between electric charges calculated process corrosion indicated morphology its dimension are dependent content chloride-containing solutions. larger pit, reflecting growth.
elsevier.com
sci-hub.se 参考文章(14)
M.H. Moayed, R.C. Newman, Evolution of current transients and morphology of metastable and stable pitting on stainless steel near the critical pitting temperature Corrosion Science. ,vol. 48, pp. 1004- 1018 ,(2006) , 10.1016/J.CORSCI.2005.03.002
M.H. Moayed, R.C. Newman, Aggressive effects of pitting “inhibitors” on highly alloyed stainless steels Corrosion Science. ,vol. 40, pp. 519- 522 ,(1998) , 10.1016/S0010-938X(97)00137-6
R.C. Newman, M.A.A. Ajjawi, A micro-electrode study of the nitrate effect on pitting of stainless steels Corrosion Science. ,vol. 26, pp. 1057- 1063 ,(1986) , 10.1016/0010-938X(86)90133-2
P.C. Pistorius, G.T. Burstein, Growth of corrosion pits on stainless steel in chloride solution containing dilute sulphate Corrosion Science. ,vol. 33, pp. 1885- 1897 ,(1992) , 10.1016/0010-938X(92)90191-5
Woo-Jin Lee, Su-Il Pyun, Effects of sulphate ion additives on the pitting corrosion of pure aluminium in 0.01 M NaCl solution Electrochimica Acta. ,vol. 45, pp. 1901- 1910 ,(2000) , 10.1016/S0013-4686(99)00418-1
E.A. Abd El Meguid, A.A. Abd El Latif, Critical pitting temperature for Type 254 SMO stainless steel in chloride solutions Corrosion Science. ,vol. 49, pp. 263- 275 ,(2007) , 10.1016/J.CORSCI.2006.06.011
C Liu, A Leyland, Q Bi, A Matthews, Corrosion resistance of multi-layered plasma-assisted physical vapour deposition TiN and CrN coatings Surface & Coatings Technology. ,vol. 141, pp. 164- 173 ,(2001) , 10.1016/S0257-8972(01)01267-1
Digby D. Macdonald, D. Owen, The Electrochemistry of Iron in lM Lithium Hydroxide Solution at 22° and 200°C Journal of The Electrochemical Society. ,vol. 120, pp. 317- 324 ,(1973) , 10.1149/1.2403446
P Ernst, R.C Newman, Pit growth studies in stainless steel foils. I. Introduction and pit growth kinetics Corrosion Science. ,vol. 44, pp. 927- 941 ,(2002) , 10.1016/S0010-938X(01)00133-0
H. P. Leckie, H. H. Uhlig, Environmental Factors Affecting the Critical Potential for Pitting in 18–8 Stainless Steel Journal of The Electrochemical Society. ,vol. 113, pp. 1262- 1267 ,(1966) , 10.1149/1.2423801