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1 Introduction Pitting corrosion is a particular type of localized corrosion, in which the corrosion rate is higher in some areas compared with others ( Jones, 1992 ; Frankel, 1998 ; Revie, 2008 ; Marcus, 2011 ). Pitting corrosion damage is observed in many alloys which are protected from general corrosion by a passive film on their surface. Some widely used alloys, like stainless steel and aluminum alloys, suffer from pitting corrosion. Corrosion pits with various shapes and forms, some developing “hidden” by a perforated cover, can grow large and contribute

-91. 5. Butler G., Stretton P., Beynon J.G.: Initiation and growth of pits on high purity iron and its alloys with chromium and copper in neutral chloride solution . British Corrosion Journal, 1972, Vol.7. July, pp. 168-173. 6. Wang Q.Y., Kawagoishi N., Chen Q.: Effect of pitting corrosion on very high cycle fatigue behaviour. Scripta Materialia 2003, Vol.49, pp.711-716. 7. Wranglen G.: Pitting and sulphide inclusions in steel. Corrosion Science, 1974, Vol.14, pp.319-349. 8. Melchers R.E.: Pitting corrosion of mild steel in marine immersion environment - Part 1

References Jakubowski M.: Influence of pitting corrosion on fatigue and corrosion fatigue of ship structures. Part I: Mechanism and modeling of pitting corrosion of ship structures. To be published in Polish Maritime Research Jakubowski M.: Influence of pitting corrosion on fatigue and corrosion fatigue of ship structures. Part II: Loading - pitting - cracking interaction. To be published in Polish Maritime Research Melchers R. E.: Pitting corrosion of mild steel in marine immersion environment - Part 1: Maximum pit depth. Corrosion, 2004, Vol.60, No 9, pp

addition of alloying elements, such as rare earth Ce, may influence its original corrosion resistance. It was also reported in previous studies that stainless steels may suffer from pitting corrosion due to the presence of nonmetallic inclusions, and these inclusions, such as manganese sulfides, act as initiation sites for pitting corrosion [ 9 , 10 , 11 , 12 ]. Some studies showed that the improvement of the corrosion resistance of the austenitic stainless steels by adding rare earth elements is due to modified inclusions inhibiting the occurrence of pitting

References 1. Melchers R.E.: Pitting corrosion of mild steel in marine immersion environment - Part 1: Maximum pit depth. Corrosion, 2004, Vol.60, No 9, pp.824-836. 2. Chlistovsky, Hefferman P.J., DuQuesnay D.L., Corrosion fatigue behavior of 7075-T651 aluminum alloy subjected to periodic overloads, International Journal of Fatigue, 2007, vol.29, pp.1941-1949 3. van der Walde K., Hillberry B.M., Initiation and shape development of corrosion nucleated fatigue cracks, International Journal of Fatigue, 2007, Vol.29, pp.1269-1281 4. Lu B.T., Luo J.L.: Crack

Z. Phys. Chem. 226 (2012) 59–85 / DOI 10.1524/zpch.2011.0122 © by Oldenbourg Wissenschaftsverlag, München Pitting Corrosion of Zinc in Na2S2O3 Solutions. Part I. Polarization Studies and Morphology of Pitting By S. S. Abd El-Rehim1, E. Hamed1, A. M. Shaltot1, and M. A. Amin1,2,∗ 1 Faculty of Science, Chemistry Department, Ain Shams University, 11566 Abbassia, Cairo, Egypt 2 Materials and Corrosion Lab, Faculty of Science, Chemistry Department, Taif University, 888 Hawaiya, Saudia Arabia (Received March 7, 2011; received in revised form July 28, 2011) Zinc

Z. Phys. Chem. 2016; 230(10): 1531–1549 Hesham S. Abdel-Samad and Hamdy H. Hassan* Pitting Corrosion of Zn Peculiarly Caused by Acetate Anions DOI 10.1515/zpch-2016-0766 Received February 6, 2016; accepted April 7, 2016 Abstract: The corrosion behaviour of zinc metal was studied in acetate solutions. The potentiodynamic polarization curve in 0.1M acetate solution displays an an- odic peak (A1) owing to the anodic dissolution of zinc followed by a passive layer formation region. Breakdown of the passive film and the initiation of pitting cor- rosion were observed

DOI 10.1515/jmsp-2012-0031   J. Manuf. Sci. Prod. 2013; 13(1–2): 15 – 23 Kondapalli Siva Prasad*, Chalamalasetti Srinivasa Rao and Damera Nageswara Rao Effect of Welding Parameters on Pitting Corrosion Rate in 3.5N NaCl of Pulsed Current Micro Plasma Arc Welded AISI 304L Sheets Abstract: Austenitic stainless steel sheets have gathered wide acceptance in the fabrication of components, which require high temperature resistance and corrosion resis­ tance, such as metal bellows used in expansion joints in  aircraft, aerospace and petroleum industry. In case of

Z. Phys. Chem. 225 (2011) 21–43 / DOI 10.1524/zpch.2011.0005 © by Oldenbourg Wissenschaftsverlag, München Uniform and Pitting Corrosion Processes of Al, Al-6061, Al-Zn and Al-Cu Alloys Exposed to SCN− Solutions and the Effect of Some Inorganic Anions By Mohammed A. Amin∗ and Sayed S. Abd El-Rehim Chemistry Department, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egypt (Received May 23, 2010; accepted in final form August 2, 2010) KSCN Solutions / Uniform and Pitting Corrosion Processes / Al / Al Alloys / Inorganic Inhibitors The effect of the

refining, chemical processes, and desalination ( Loto et al., 2012a , b ; Oguike, 2014 ). They are the most used materials in industrial processes involving higher temperature and resistance to pitting corrosion. The corrosion resistance of austenitic SS is attributed to the formation of a thin, adherent passive film developed on the surface in most environments ( Oguike, 2014 ). It is generally believed that passivity is due to the formation of a 3D film (usually an oxide film) that impedes the flow of current across the metal-solution interface ( MacDonald, 2012