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Received April 28, 2011
Accepted July 7, 2011
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고분자전해질 연료전지에서 TiN과 Ti/TiN이 코팅된 스텐레스 강 분리판의 부식 특성
Analysis of Corrosion Characteristics for TiN- and Ti/TiN-coated Stainless Steel Bipolar Plate in PEMFC
군산대학교 나노화학공학과, 573-701 전북 군산시 미룡동 대학로 1170 1전북대학교 신소재공학부, 561-756 전북 전주시 덕진구 백제대로 567 2재료연구소 융합공정연구본부, 642-831 경남 창원시 성산구 창원대로 797
Department of Nano & Chemical Engineering, Kunsan National University, 1170 Daehangro, Miryong-dong, Gunsan-si, Jeonbuk 573-701, Korea 1School of New Material Science, Chonbuk National University, 567 Baekjae daero, Deokjin-gu, Jeonju-si, Jeonbuk 561-756, Korea 2Materials Processing Division, Korea Institute of Materials Science, 797 Changwondaero, Seongsan-gu, Changwon-si, Gyeongnam 642-831, Korea
jpshim@kunsan.ac.kr
Korean Chemical Engineering Research, February 2012, 50(1), 118-127(10), NONE Epub 2 February 2012
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Abstract
고분자전해질 연료전지용 분리판 소재로 스텐레스 강의 내식성과 전기전도성을 향상시키기 위해 표면을 TiN(titanium nitride) 또는 Ti/TiN(titanium/titanium nitride)으로 코팅하여 연료전지 운전환경에서 표면 코팅층의 물성 변화를 조사하였다. 200시간의 연료전지 운전에서 표면 코팅층의 부식, 균열(crack), 박리, 표면 화학조성 변화 등을 분석하여 코팅된 TiN 또는 Ti/TiN 박막의 역할을 규명하고자 하였다. 스텐레스 강 분리판의 전기전도도와 부식저항성은 소재 표면에 질화층 박막을 코팅함으로써 증가하였으나 연료전지 환경하에서 운전시 코팅된 박막의 부식과 박리현상이 SUS316L-Ti/TiN을 제외하고 현저히 발생하였다. TiN 코팅층과 하부 기재 사이에 Ti 중간층을 도입함으로써 TiN 박막의 밀착성이 향상되고 또한 코팅층의 두께 증가로 부식 위험성이 감소하는 것을 관찰하였다.
TiN or Ti/TiN was coated on stainless steel as bipolar plate in polymer electrolyte membrane fuel cells (PEMFCs) to improve their corrosion resistance and electric conductivity, and their properties were examined under fuel cell operating condition. After 200 hours operation, the behaviors for the corrosion, crack and dissolution of coating layer were investigated by various techniques. The corrosion and exfoliation of coating layer were considerably generated except for SUS316L-Ti/TiN after fuel cell operation even if the electric conductivity and corrosion resistance of coated stainless steel bipolar plates were improved. The adoption of Ti layer between TiN layer and the surface of stainless steel enhanced the adhesion of TiN layer and decreased the possibility of corrosion by the increase of coating layer.
Keywords
References
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Cho EA, Jeon US, Ha HY, Hong SA, Oh IH, J. Power Sources, 125(2), 178 (2004)
Heinzel A, Mahlendorf F, Niemzig O, Kreuz C, J. Power Sources, 131(1-2), 35 (2004)
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Nam DG, J. Kor. Soc. Marine. Eng., 33(9), 1095 (2009)
Hermann A, Chaudhuri T, Spagnol P, Int. J. Hydrogen Energy., 30(4), 359 (2005)
Lee CR, Yang C, Moon S, Jeong Y, Proc.Kor. Ins. Surf. Eng., A-12 (2007)
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Lee JJ, Kim IT, Zhang Y, Lee HK, Shim J, J. Kor. Electrochem. Soc., 10(4), 270 (2007)
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Oh IH, Lee JB, Corr. Sci. Tech., 9(3), 129 (2010)
Davies DP, Adcock PL, Turpin M, Rowen SJ, J. Appl. Electrochem., 30(1), 101 (2000)
Zhang SS, Yuan XZ, Hin JNC, Wang HJ, Friedrich KA, Schulze M, J. Power Sources, 194(2), 588 (2009)
Kim L, Chung CG, Sung YW, Chung JS, J. Power Sources, 183(2), 524 (2008)
Wu JF, Yuan XZ, Martin JJ, Wang HJ, Zhang JJ, Shen J, Wu SH, Merida W, J. Power Sources, 184(1), 104 (2008)
Kelly MJ, Fafilek G, Besenhard JO, Kronberger H, Nauer GE, J. Power Sources, 145(2), 249 (2005)
Antunes RA, Oliveira MCL, Ett G, Ett V, Int.J. Hydro. Energy., 35(8), 3632 (2010)
Chung CY, Chen SK, Chiu PJ, Chang MH, Hung TT, Ko TH, J. Power Sources, 176(1), 276 (2008)
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Pierson, H. O., “Handbook of Refractory Carbides and Nitrides:Properties, Characteristics, Processing, and Applications,” William Andrew., 193 (1996)
Luo Z, Li D, Tang H, Pan M, Ruan R, Int. J. Hydro. Energy., 31(13), 1831 (2006)
Mitsushima S, Kawahara S, Ota KI, Kamiya N, J. Electrochem. Soc., 154(2), B153 (2007)
Xie J, Wood DL, Wayne DM, Zawodzinski TA, Atanassov P, Borup RL, J. Electrochem. Soc., 152(1), A104 (2005)
Akita T, Taniguchi A, Maekawa J, Sirorna Z, Tanaka K, Kohyama M, Yasuda K, J. Power Sources, 159(1), 461 (2006)
Wang HL, Turner JA, J. Power Sources, 128(2), 193 (2004)
Wang HL, Sweikart MA, Turner JA, J. Power Sources, 115(2), 243 (2003)
Li M, Luo S, Zeng C, Shen J, Lin H, Cao C, Corr. Sci., 46(6), 1369 (2004)
