Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지

Corrosion Behavior and Crystal Structure of Zn-Cr Coatings by EB-PVD and Electroplating

EB-PVD법과 전기화학방법으로 형성된 Zn-Cr film의 구조와 부식특성

  • 최한철 (조선대학교 치과대학 치과재료학교실 및 생체재료나노계면활성화센터)
  • Published : 2003.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

It has been investigated corrosion resistance and crystal structure of Zn-Cr coatings fabricated by electroplating method and electron-beam physical vapor deposition method(EB-P VD). The electroplated Zn-Cr alloy consists mainly of η'-Zn phase for the lower Cr content than 7.9 wt% Cr and ${\gamma}$'-ZnCr phase for the higher Cr content. In the Zn-Cr alloy fabricated by EB-PVD the ${\gamma}$'-ZnCr phase appeared clearly at 3 wt% Cr and it became the sole phase at 50 wt%Cr. The amount of η'-Zn phase decreased obviously with increasing Cr content when it exceeded 15 wt% Cr. The electrochemical measurement of the electroplated Zn-Cr film has shown corrosion potential of about -1000 mV. The current density of active region and the amount of dissolved Zn and Cr decreased significantly with increasing Cr content. The electrochemical characteristics of Zn-Cr alloy fabricated by EB-PVD have shown that the alloy of 50 wt% Cr had the highest corrosion potential(-500 mV) and the lowest critical passive current density than that of the electroplated.

Keywords

References

  1. 駱木眞-, 金九辰也, 新井勝利, 深圖 新, 近田 演,CAMP-ISIJ, 4 (1991) 1601
  2. A. Watson, Y. J. Su, M. R. el-Shanf, C. U. Chisholm,Trans. Inst. Metal Finish., 71 (1993) 15-20. https://doi.org/10.1080/00202967.1993.11870976
  3. Tomihiro Hara, Masaru Sagiyama, Takayuki Urakawa,Takeshi Adaniya, Yasuo Fukuda, YasuoTsuchiya,Nippon Kokan Technical Report, 48 (1987) 29-37.
  4. Tesuya Akiyama, Hisaaki Fukushima, Yoich Miyakawa,Kei Higashi, Tkayuki Urakawa, Masaru Sagiyama,B本金屬表面技術, 40 (1989) 927-932.
  5. T. Akiyama, H. Hukushima, K. Higashi, M. Sagiyama,R. Kammel, Metall. 43 (1989) 1142-1146.
  6. Chizuko Maeda, Tetsuya Mega, Junichi Shimomura,Shigeo Kurokawa, 鐵과 銅, 82 (1996) 69-74.
  7. Masaki Yasuda, Yoshikazu Sakaguchi, Hiromi Tsuji,Yukio Ogata, Fumio Hine, 日本金屬表面技術, 39(1988) 19-22.
  8. Kazuo Matsudo, Takeshi Adaniya, Masaru Ohmura,Maahiro Ogawa, 鐵과 鋼, 66 (1980) 46-52.
  9. Makoto Hino, Kengo Hiramatsu, Minom Hiramatsu,Hitoshi Kawasaki, Isamu Kotani, 日本金屬表面技術,44 (1993) 67-68.
  10. M. R. el-Shahf, A. Watson, C. U. Chisholm, Trans.Inst. Metal Finish., 66 (1988) 34-38. https://doi.org/10.1080/00202967.1988.11870801
  11. Masaki Yasuda, Hiromi Tsuji, Yoshikazu Sakaguchi,Yukio Ogata, Fumio Hine, 日本金屬表面技術, 39(1988) 70-73.
  12. Masaki Yasuda, Hiromi Tsuji, Yukio Ogata, Fumio Hine, 日本金屬表面技術, 39 (1988) 282-284.
  13. Satoshi Hashimoto, Satoru Ando, Takayuki Urakaya,Masaru Sagiyama, J. Japan Inst. Metals, 62 (1998)9-14. https://doi.org/10.2320/jinstmet1952.62.1_9
  14. Thaddeus B. Massalski, Binary Alloys Phase Diagrams,1 (1986) 881
  15. G. Hindrichs, Z. Anrg. Chem., 59 (1908) 414-415. https://doi.org/10.1002/zaac.19080590136
  16. Akira Takahashi, Yasuhiko Miyoshi, Takashi Hada,日本表面技術協會, 87回 講演大會, (1993) 138-139.
  17. H. C. Choe, D. C. Choi, K. H. Kim, D. S. Ahn,M. S. Kim, J. Korean Inst. Suf. Eng., 30 (1997) 13-22.
  18. R. W. Lynch, H. G. Dnckamer, J. Phys. and Chem.of Sol., 26 (1965) 63-65. https://doi.org/10.1016/0022-3697(65)90073-9
  19. Don T. Comer, J. T. Waber, Intenational Tablesfor X-ray Christallography IV, Ed. by J. A. Ibersand W. C. Hamilton, Kluwer Academic Publishers, Dordrecht, (1974) 4730
  20. H. Harmann, W. Hofmann and D. Miller, Abhandl.Braunschweig. Wiss. Ges, 7 (1955) 100.
  21. N. R. Short, A. Abibsi, J. K. Dennis, Trans. Inst,67 (1988) 73-74.
  22. P. L. Brown, Acta Crystallogr., 15 (1962) 608-610 https://doi.org/10.1107/S0365110X62001528
  23. H. C. Choe, D. C. Choi, K. H. Kim, 'A Study onthe Fabrication Method of Zn-Cr Alloy Phase', POSCO Reaearch Report Korea, (1997) 37-43.