Browse > Article

Corrosion Behaviors of TiN Coated Dental Casting Alloys  

Jo, Ho-Hyeong (Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials, College of Dentistry, 2nd Stage of Brain Korea 21 for College of Dentistry, Chosun University)
Park, Geun-Hyeng (Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials, College of Dentistry, 2nd Stage of Brain Korea 21 for College of Dentistry, Chosun University)
Kim, Won-Gi (Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials, College of Dentistry, 2nd Stage of Brain Korea 21 for College of Dentistry, Chosun University)
Choe, Han-Cheol (Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials, College of Dentistry, 2nd Stage of Brain Korea 21 for College of Dentistry, Chosun University)
Publication Information
Korean Journal of Metals and Materials / v.47, no.2, 2009 , pp. 129-137 More about this Journal
Abstract
Corrosion behaviors of TiN coated dental casting alloys have been researched by using various electrochemical methods. Three casting alloys (Alloy 1: 63Co-27Cr-5.5Mo, Alloy 2: 63Ni-16Cr-5Mo, Alloy 3: 63Co-30Cr-5Mo) were prepared for fabricating partial denture frameworks with various casting methods; centrifugal casting(CF), high frequency induction casting(HFI) and vacuum pressure casting(VP). The specimens were coated with TiN film by RF-magnetron sputtering method. The corrosion behaviors were investigated using potentiostat (EG&G Co, 263A. USA) in 0.9% NaCl solution at $36.5{\pm}1^{\circ}C$. The corrosion morphologies were analyzed using FE-SEM and EDX. Alloy 1 and Alloy 2 showed the ${\alpha}-Co$ and ${\varepsilon}-Co$ phase on the matrix, and it was disappeared in case of TiN coated Alloy 1 and 2. In the Alloy 3, $Ni_2Cr$ second phases were appeared at matrix. Corrosion potentials of TiN coated alloy were higher than that of non-coated alloy, but current density at passive region of TiN coated alloy was lower than that of non-coated alloy. Pitting corrosion resistances were increased in the order of centrifugal casting, high frequency induction casting and vacuum pressure casting method from cyclic potentiodynamic polarization test.
Keywords
TiN coating; casting alloy; pitting corrosion; $Ni_2Cr$ phase; ${\alpha}-Co$ and ${\varepsilon}-Co$ phase;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 3  (Related Records In Web of Science)
Times Cited By SCOPUS : 2
연도 인용수 순위
1 R. G. Craig, W. J. O'brien, and J. M. Powers, Dental materials, 2nd ed., p.201,The C.V Mosby Co. (1979)
2 R. Earnshaw, Brit Dent J. 67, 101 (1956)
3 S. Civjan, E. F. Hugut, W. L. Erhard, and G. J. Vaccaro, J Pros Dent. 28, 77 (1972)   DOI   ScienceOn
4 D. E. MacDonald, F. Betts, M. Stranick, S. Doty, and A. L. Boskey, J Biomed Mater Res. 54, 4480 (2001)   DOI   ScienceOn
5 J. K. Lee, H.C. Choe, and C.H. Chung, Metals and Materials International 10, 327 (2004)   DOI   ScienceOn
6 H. C. Choe, K. S. Hong, Y. M. Ko, and B. O. Kim, J. Kor Inst Met & Mater. 44, 400 (2006)
7 Z. L. Zhang, and T. Bell, Surface Engineering 1, 131 (1985)   DOI
8 D. M. Brunette, P. Tengvall, M. Textor, and P. Thomsen, Titanium in medicine, Springer, 320 (2001)
9 M. Y. Oh, W. G. Kim, and H. C. Choe, J. Kor. Inst. Met. & Mater. 10, 691 (2008)
10 R. G. Craig, and J. M. Powers, Restorative dental materials, 11th ed., Mosby, Inc., p.481-507 (2002)
11 M. J. Han, H. C. Choe, and C.H. Chung, Metals and Materials International 11, 449 (2005)   DOI   ScienceOn
12 T. C. Nilson, Oliveira, A. Elivelton, Ferreira, T. Lais, Duarte, R. Sonia Biaggio, C. Romeu, Rocha-Filho, Nerilso Bocchi, Electrochimica Acta 51, 2068 (2006)   DOI   ScienceOn
13 H. C. Choe, and Y. M. Ko, Materials Science Forum 475, 2287 (2005)   DOI
14 H. C. Choe, and Y. M. Ko, The Korea research society for Dental material 31, 21 (2004)