Browse > Article
http://dx.doi.org/10.5229/JKES.2006.9.2.070

Applications of Micro-Droplet Cell to Study of Localized Corrosion Resistance of Stainless Steels  

Kim Sung-Yu (Seah Besteel)
Kim Hee-San (School of Mat. Sci. and Eng., Hongik University)
Publication Information
Journal of the Korean Electrochemical Society / v.9, no.2, 2006 , pp. 70-76 More about this Journal
Abstract
Micro-droplet cell with free droplet as a micro-electrochemical technique has been limited to apply to electrochemical systems with high wetting properties such as an acidic solution and low grade stainless steels(Type 316L). By loading negative pressure to a droplet, control of droplet size, and use of hydrophobic gasket, the cell is modified to be allowed to use for electrochemical systems with high wetting properties. For giving the reliability of new cell, studies on local corrosion were conducted for three different systems-an acidic chloride solution and high chromium ferritic stainless steel, the other acidic chloride solution and type 316, and a neutral chloride solution and type 316. stainless steel. Firstly, the modified micro-droplet cell allows the anodic polarization curves in an acidic chloride solution to show the fact that the local corrosion of high chromium stainless steel near the $\alpha/\sigma$ interface is due to the Cr depleted zone. Secondly, the local anodic polarization test of type 316 L in the other acidic chloride solution can be successfully conducted in the cell. Furthermore, the local polarization curves help elucidating the corrosion of type 316 with $\delta-ferrite$ phase. Finally, the polarization curves of type 316 L in a neutral chloride solution indicates that the factor affecting the pitting corrosion resistance was inclusions rather than $\delta-ferrite$.
Keywords
$\delta-ferrite$ phase; Phase; Calcium sulfide; Wettability;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M. S. El-Basiouny and S. Haruyama, 'The polarization behaviour of Fe-Cr alloys in acidic sulphate solutions in the active region' Corros. Sci., 16, 529 (1976)   DOI   ScienceOn
2 R. C. Newman, 'The dissolution and passivation kinetics of stainless alloys containing molybdenum-1. Coulometric studies of Fe-Cr and Fe-Cr-Mo alloys' Corros. Sci., 25, 331 (1985)   DOI   ScienceOn
3 I. Olefjord and B. O. Elfstrom, 'Composition of the surface during passivation of stainless steels' Corrosion, 38, 46 (1982)
4 J. N. Wanklyn, 'The role of molybdenum in the crevice corrosion of stainless steels' Corros. Sci., 21, 211 (1981)
5 H. Kim and Y. D. Lee, 'Effect of microalloy elements on corrosion resistance of high-chrominum containing stainless steels in chloride solutions' Corrosion, 57, 547 (2001)   DOI   ScienceOn
6 T. Suter, E. G. Webb, H. Bohni, and R. C. Alkire, 'Pit Initiation on Stainless Steels in 1 M NaCI With and Without Mechanical Stress' J. ElectroChem. Soc., 148, B186 (2001)   DOI   ScienceOn
7 T. Suter, 'Mikroclektronische Untersuchungen bei austenitischen 'rostfreien' Stahlen' Ph. D. Thesis No. 11962, ETH Zurich, Zurich, Swiss (1997)
8 M. M. Lohrengel, A. Moehring, and M. Pilaski, 'Capillary-based droplet cells: limits and new aspects' Electrochimi. Acta, 47, 137 (2001)   DOI   ScienceOn
9 R. C. Alkire and K. P. Wong, 'The corrosion of single pits on stainless steel in acidic chloride solution' Corros. Sci., 28, 411 (1988)
10 W. Brandl, 'Practicability of electrochemical measurements in microareas' Electrochim. Acta, 37, 2263 (1992)
11 M. M. Lohrengel, A. Moehring, and M. Pilaski, 'Electrochemical surface analysis with the scanning droplet cell' Fresenius J. Anal. Chem., 367, 334 (2000)
12 H. Kim, 'Effect of nickel and tungsten on dissimilar material crevice corrosion resistance of super ferritic stainless steels' Corrosion/2002, paper no. 02208, April 7-11, 2002, National Association of Corrosion Engineers, Houston, Texas
13 P. E. Manning, C. E. Lyman, and D. J. Duquette, 'A STEM examination of the localized corrosion behavior of a duplex stainless steel' Corrosion, 36, 246 (1980)
14 A. Garner, 'Chloride pitting and crevice corrosion of austenitic stainless steel weld metal' Corrosion/78, paper no. 78020, March 6-10, 1978, National Association of Corrosion Engineers, Houston, Texas
15 S.- Y. Kim, 'Effects of secondary phases on the corrosion resistance of stainless steels using micro-droplet cell' MS. Thesis, Hongik Uni., Jochiwon, Korea (2006)
16 K. Ososawa and H.-J. Engell, 'The anodic polarization curves of iron-nickel-chromium alloys' Corros. Sci., 6, 389 (1966)   DOI   ScienceOn
17 R. A. Perren, T. Suter, P. J. Uggowitzer, L. Weber, R. Magdowski, H. Sohni, and M.O. Speidel, 'Corrosion resistance of super duplex stainless steels in the chloride ion containing environments: investigations by means of a new microelectrochemical method II. Influence of precipitates' Corros. Sci., 43, 727 (2001)   DOI   ScienceOn
18 C. J. Park, M. M. Lohrengel, T. Harnelman, M. Pilaski, and H. S. Kwon, 'Grain-dependent passivation of surfaces of polycrystalline zinc' Electrochimica Acta, 47, 21, 3395-3399 (2002)   DOI   ScienceOn
19 C. J. Park, H.-S. Kwon, and M. M. Lohrengel, 'Micro-electrochemical polarization study on 25% Cr duplex stainless steel' Materials Sci. and Eng., 372, 180 (2004)   DOI   ScienceOn
20 R. A. Perren, T. Suter, P. J. Uggowitzer, L. Weber, R. Magdowski, H. bohni, and M. O. Speidel, 'Corrosion resistance of super duplex stainless steels in the chloride ion containing environments: investigations by means of a new microelectrochemical method I. Precipitates-free states' Corros. Sci., 43, 707 (2001)   DOI   ScienceOn
21 T. Suter and H. Bohni, 'A new electrochemical method to study pit initiation on stainless steels' Electrochim. Acta, 42, 3275 (1997)
22 T. Suter, H. Bohni, 'Microelectrodes for corrosion studies in rnicrosystem' Electrochim. Acta, 47, 191 (2001)   DOI   ScienceOn
23 H. Ha and H. Kwon, 'Effects of $Cr_2$N on Pitting Corrosion of High Nitrogen Stainless Steel Investigated by Micro-droplet Cell' 208th ECS Meeting, no. 367 October 16-21, 2005, Los Angeles, California
24 C. Lu and C. R. Clayton, 'Evidence for a bipolar mechanism of passivity in Mo bearing stainless steel' J. Electrochem. Soc., 132, 2517 (1985)   DOI
25 S. K. Ryu, Y. H. Kim, and Y. D. Lee, 'Microbially Influenced Corrosion in Type 304 Stainless Steel Buried Pipe' J. Corros. Sci. of Korea, 25, 349 (1996)
26 S. Haupt and H.-H. Strehblow, 'A combined surface analytical and electrochemical study of the formation of passive layers on FeCr alloys in 0.5 M $H_2SO_4$' Corros. Sci., 37, 43 (1995)   DOI   ScienceOn