Browse > Article

Corrosion Characteristics of Ti, Ti/Cr Coated and Plasma-Nitrided Surface for Stainless Steel Containing Ti  

최한철 (광양보건대학 치기공과)
이승훈 (전남대학교 금속공학과)
김관휴 (전남대학교 금속공학과)
Publication Information
Journal of the Korean institute of surface engineering / v.36, no.1, 2003 , pp. 89-98 More about this Journal
Abstract
Corrosion characteristics of Ti, Ti/Cr coated and plasma-nitrided surface for stainless steel containing Ti have been studied. Stainless steels containing 0.09-0.92wt% Ti were fabricated by using vacuum furnace and solutionized for 1hr at $1050^{\circ}C$. Ti and Cr coatings were done on solutionized stainless steel surface by EB-PVD. The Ti coated specimen were coated by Cr and were nitrided by plasma at $450^{\circ}C$ for 5hr Microstructure and phase analysis were performed using SEM, OM and EDX. Corrosion behavior of the coated specimen was investigated by electrochemical test. The coated surface was of fine columnar structure. The Ti/Cr coated surface was denser than the Ti coated and the Ti coated-nitrided surfaces. The corrosion and pitting potential increased in proportion to the Ti content, coating temperature, coating thickness and formation of stable oxide film. The current density in active and passive region decreased in the case of Ti/Cr coated sample and Ti coated-nitrided samples. Especially the plasma nitrided specimen after Ti coating have a good corrosion resistance compared with the Ti coated specimen. The number and size of pits decreased as Ti content of matrix increased.
Keywords
Oxidation; Lolor-titanium products; Anodizing oxidation process;
Citations & Related Records
연도 인용수 순위
  • Reference
1 차승옥, 최한철, 김관휴, 대한금속학회지, 36 (1998) 138
2 E. Harju, A. S. Korhonen, Laizhu Jiang, E. Ristolaien, Surface and Coating Technology, 856 (1996) 189
3 J. A. Thomton, Ann. Rev. ScL, 7 (1977) 239   DOI   ScienceOn
4 A. Mochvan, A. V. Demchishin, Fiz. Met. Metalloved.,28 (1969) 635
5 M. Poubaix, Atlas of Electrochemical Equilibria in Aqueous Solutions, NACE, Houston, (1974) 213
6 H. Uno, A. Kimmura, T. Misawa, Corrosion, 48 (1992) 467   DOI
7 최한철, 김관휴, 대한금속학회지, 37 (1995) 475
8 S. O. Cha, H. C. Choe, K. H. Kim, J. of the Korean Inst. of Met & Mater, 37 (1999) 137
9 E. C. barn, R. H. Abron, j. j. B. Rutherfold, Trans. Amer. Soc. SteelTreat, 21 (1933) 481