고온 용융염에서 Fe기 및 Ni기 초합금의 부식거동 및 합금원소의 영향

조수행; 장준선; 정명수; 오승철; 신영준; Soo-Haeng Cho; Jun-Shan Zhang; Myeong-Soo Jeong; Seung-Chul Oh; Young-Joon Shin

Korean Journal of Materials Research, Vol.9, No.10, 985-991, October, 1999

Export Citation

고온 용융염에서 Fe기 및 Ni기 초합금의 부식거동 및 합금원소의 영향

Corrosion Behavior and Effect of Alloying Elements of Fe-base and Ni-base Superalloys on Hot Molten Salt

조수행, 장준선¹, 정명수, 오승철, 신영준

한국원자력연구소
¹대련이공대학 재료공정계

Soo-Haeng Cho, Jun-Shan Zhang¹, Myeong-Soo Jeong, Seung-Chul Oh, and Young-Joon Shin

Korea Atomic Energy Research Institute, Taejon, 305-600, Korea
¹Dept. of Materials Eng., Dalian University of Technology, Dalian, China, Korea

초록

Incoloy 800H, KSA (Kaeri Superalloy)-6, Inconel 600 및 Hastelloy C-276 합금의 용융염에서의 부식거동을 650~85 0 ? C 온도범위에서 조사하였다. LiCl-Li 2 O혼합용융염에서의 부식은 Li 2 O에 의한 염기성 용해 기구에 의해 진행되며, 부식속도가 LiCl에서보다 훨씬 빠르게 나타났다. 혼합용융염 LiCl-Li 2 O에서는 Ni기 합금의 부식속도가 Fe기 합금보다 빠르고, Mo와 W의 함량이 높은 Hastelloy C-276이 가장 빠른 부식속도를 나타내었다. 용융염 LiCl에서는 LiCrO 2 의 단일 부식층이 형성되고, LiCl-Li 2 O 혼합용융염에서는 산화물과 Ni의 2상구조의 다공성 부식층이 형성되었다.

orrosion behaviors of Incoloy 800H, KSA(Kaeri Superalloy)-6, Inconel 600 and Hastelloy C-276 in molten salts were investigated in the temperature range of 650 ~ 850 ? C . Due to Li 2 O -induced basic fluxing mechanism, the corrosion rates of the alloys in mixed molten salt of LiC1- Li 2 O were significantly higher than those in molten salt of LiCl. In the mixed molten salt, Fe-base alloys showed higher corrosion resistance than the Ni-base alloys. and Hastelloy C-276 with high Mo and W contents exhibited the highest corrosion rate among the examined alloys. The single layer of LiCrO 2 was formed in molten salt of LiCl and two phase structure of a scale consisted of oxides and Ni was formed in the mixed molten salt.

[References]

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Reid WT, Corey RC, Cross BJ, Trans. ASME, 67, 279 (1945)
Simons EL, Browning GV, Liebhafsky HA, Corrosion, 11, 505 (1955)
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Bornstein NS, DeCrescente MA, Met. Trans., 2, 2875 (1971)
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Geobel JA, Pettit FS, Goward GW, Met. Trans., 4, 261 (1973)
Gupta DK, Rapp RA, J. Electrochem. Soc., 127, 2194 (1980)
Gupta DK, Rapp RA, J. Electrochem. Soc., 127, 2656 (1980)
Zhang YS, Rapp RA, J. Electrochem. Soc., 132, 734 (1985)
Zhang YS, Rapp RA, J. Electrochem. Soc., 132, 2498 (1985)
Zhang YS, J. Electrochem. Soc., 133, 655 (1986)
Rapp RA, Goto KS, Braunstein J(ed.), Selman JR(ed.), J. Electrochem. Soc., 159 (1980)
Grabke HJ, Reese E, Spiegel M, Corro. Sci., 37, 1023 (1995)
Spirgel M, Reese E, Materials. Corrosion, 47, 179 (1996)
Grabke HJ, Reese E, Spiegel M, Proc. 5th Intern. Sym. on Molten Salts Chem. Tech., 5, 405 (1998)
Cho SH, Park SC, Zhang JS, Shin YJ, Park HS, Korean J. Mater. Res., 9 (1999)
Dyer LD, Borier BS, Jr., Smith GP, J. Am. Chem. Soc., 76, 1499 (1954)
Giggins CS, Pettit FS, Trans. Met. Soc. AIME, 245, 2495 (1969)

[Referenced By]

[1] Kohl FJ, Santoro GJ, Stearns CA, Fryburg GC, Rosner DE, J. Electrochem. Soc., 126, 1054 (1979)

[2] Reid WT, Corey RC, Cross BJ, Trans. ASME, 67, 279 (1945)

[3] Simons EL, Browning GV, Liebhafsky HA, Corrosion, 11, 505 (1955)

[4] Bornstein NS, DeCrescente MA, Trans. Met. Soc. AIME, 245, 583 (1969)

[5] Bornstein NS, DeCrescente MA, Met. Trans., 2, 2875 (1971)

[6] Geobel JA, Pettit FS, Met. Trans., 1, 1943 (1970)

[7] Geobel JA, Pettit FS, Goward GW, Met. Trans., 4, 261 (1973)

[8] Gupta DK, Rapp RA, J. Electrochem. Soc., 127, 2194 (1980)

[9] Gupta DK, Rapp RA, J. Electrochem. Soc., 127, 2656 (1980)

[10] Zhang YS, Rapp RA, J. Electrochem. Soc., 132, 734 (1985)

[11] Zhang YS, Rapp RA, J. Electrochem. Soc., 132, 2498 (1985)

[12] Zhang YS, J. Electrochem. Soc., 133, 655 (1986)

[13] Rapp RA, Goto KS, Braunstein J(ed.), Selman JR(ed.), J. Electrochem. Soc., 159 (1980)

[14] Grabke HJ, Reese E, Spiegel M, Corro. Sci., 37, 1023 (1995)

[15] Spirgel M, Reese E, Materials. Corrosion, 47, 179 (1996)

[16] Grabke HJ, Reese E, Spiegel M, Proc. 5th Intern. Sym. on Molten Salts Chem. Tech., 5, 405 (1998)

[17] Cho SH, Park SC, Zhang JS, Shin YJ, Park HS, Korean J. Mater. Res., 9 (1999)

[18] Dyer LD, Borier BS, Jr., Smith GP, J. Am. Chem. Soc., 76, 1499 (1954)

[19] Giggins CS, Pettit FS, Trans. Met. Soc. AIME, 245, 2495 (1969)