오스테나이트 합금의 용융염부식 및 고온산화에 미치는 Si 농도와 RE 첨가의 영향

조수행; 장준선; 오승철; 신영준; 박성원; Soo-Haeng Cho; Jun-Shan Zhang; Seung-Chul Oh; Young-Joon Shin; Seong-Won Park

Korean Journal of Materials Research, Vol.12, No.1, 3-9, January, 2002

DOI10.3740/MRSK.2002.12.1.003 Export Citation

오스테나이트 합금의 용융염부식 및 고온산화에 미치는 Si 농도와 RE 첨가의 영향

Effect of Si Content and RE Addition on Molten Salt Corrosion and High Temperature Oxidation of the Austenite Alloys

조수행^†, 장준선¹, 오승철, 신영준, 박성원

한국원자력연구소
¹대련이공대학 재료공정계

Soo-Haeng Cho^†, Jun-Shan Zhang¹, Seung-Chul Oh, Young-Joon Shin, and Seong-Won Park

Korea Atomic Energy Research Insitute, Taejon 305-353, Korea
¹Dept. of Materials Eng., Dalian University of Technology, Dalian, China

E-mail:

The corrosion behavior of alloys in a molten salt was investigated along with the oxidation characteristics in the air. The basic composition of alloys in the study was Fe-25Ni-7Cr with Si and RE(rare-earth metal) as additives. The corrosion rate of the alloys was low in a molten salt of LiCl while the rate was high in the mixed molten salt of LiCl and Li 2 O . When Si is added to the base alloy of Fe-25Ni-7Cr, corrosion resistance was improved as the Si content is increased up to 3%, however, it was observed that the corrosion resistance was getting worse as the Si content is increased. The base alloy with 2.43% of Si and 0.9% of RE(KSA-65), showed higher corrosion rate compared to that of KSA-63 alloy with an equivalent amount of only Si. The corrosion resistance of KSA-65 was similar to that of the base alloy(KSA-60). The oxidation resistance of KSA-65 alloy was greatly increased even at 850 ? C for a long term exposure.

Keywords:molten salt corrosion;high temperature oxidation;molten salt

[References]

Kohl FJ, Santoro GJ, Stearns CA, Fryburg GC, Rosner DE, J. Electrochem. Soc., 126, 1054 (1979)
Reid WT, Corey RC, Cross BJ, Trans. ASME, 67, 279 (1945)
Simons EL, Browning GV, Liebhafsky HA, Corrosion, 11, 505 (1955)
Bornstein NS, DeCrescente MA, Trans. Met. Soc. AIME, 245, 583 (1969)
Bornstein NS, DeCrescente MA, Met. Trans., 2, 2875 (1971)
Goebel JA, Pettit FS, Met. Trans., 1, 1943 (1970)
Goebel JS, 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)
Cho SH, Park SC, Zhang JS, Shin YJ, Park HS, Korean J. Mater. Res., 9, 211 (1999)
Cho SH, Park SC, Zhang JS, Shin YJ, Park HS, Korean J. Mater. Res., 9, 556 (1999)
Cho SH, Zhang JS, Jeong MS, Oh SC, Shin YJ, Korean J. Mater. Res., 9(10), 985 (1999)
Cho SH, Zhang JS, Hong SS, Shin YJ, Park HS, Korean J. Mater. Res., 10(7), 471 (2000)
Seal S, Bose SK, Roy SK, Oxid. Met., 41, 139 (1994)
Saito Y, Onay B, Maruyama T, J. Phys., N3, 217 (1993)
Sttot FH, Wood GC, Stringer J, Oxid. Met., 8, 113 (1995)
Hou PY, Stringer J, Oxid. Met., 33, 357 (1990)
Rapp RA, Zhang YS, Molten Salts Forum, 5-6, 25 (1998)
松木一弘, 耐熱金屬材料第123委員會硏究報告, 33(1), 105, (1992) (1992)
Perez FJ, Otero E, Hierro MP, Gomez C, Pedraza F, de Segovia JL, Roman E, Surf. Coat. Technol., 108-109, 127 (1998)

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

[7] Goebel JS, 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] Cho SH, Park SC, Zhang JS, Shin YJ, Park HS, Korean J. Mater. Res., 9, 211 (1999)

[14] Cho SH, Park SC, Zhang JS, Shin YJ, Park HS, Korean J. Mater. Res., 9, 556 (1999)

[15] Cho SH, Zhang JS, Jeong MS, Oh SC, Shin YJ, Korean J. Mater. Res., 9(10), 985 (1999)

[16] Cho SH, Zhang JS, Hong SS, Shin YJ, Park HS, Korean J. Mater. Res., 10(7), 471 (2000)

[17] Seal S, Bose SK, Roy SK, Oxid. Met., 41, 139 (1994)

[18] Saito Y, Onay B, Maruyama T, J. Phys., N3, 217 (1993)

[19] Sttot FH, Wood GC, Stringer J, Oxid. Met., 8, 113 (1995)

[20] Hou PY, Stringer J, Oxid. Met., 33, 357 (1990)

[21] Rapp RA, Zhang YS, Molten Salts Forum, 5-6, 25 (1998)

[22] 松木一弘, 耐熱金屬材料第123委員會硏究報告, 33(1), 105, (1992) (1992)

[23] Perez FJ, Otero E, Hierro MP, Gomez C, Pedraza F, de Segovia JL, Roman E, Surf. Coat. Technol., 108-109, 127 (1998)