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The mechanism of erosion phase transition of Fe2Al5 coating in molten zinc was investigated. Experimental results indicated that etched grooves caused by interfacial tension equilibrium driving formed on sample surface. The Fe2Al5 phase, on where zinc did not adhere at the early stage of erosion, was infiltrated by zinc and solid solution Fe2Al5-Znx (η phase) was formed due to zinc atoms diffusing into Fe2Al5 phase. The erosion process of Fe2Al5 in molten zinc is directed melt at the interface caused by phase transition to drive. There were three types of phase interface，η/L,η/(η+δ)/L and η /(η+δ)/δ+L，formed in corroded area .The solid (S) / liquid (L) interface was phase-equilibrium interface and the S/S interface like η/(η+δ) and (η+δ)/δ were non phase-equilibrium interfaces at erosion temperature. The demand of phase-equilibrium interfaces and phase transitions of non-equilibrium interfaces, η→(η+δ) and (η+δ) →δ, made the S/L interface move towards to solid phase and Fe2Al5 phase was corroded by molten zinc.
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Keywords:
- molten zinc erosion /
- thermal etched /
- directed melt /
- corrosion phase transition
[1] ［1］Kato T, Nunome K, Kaneko K, Saka H 2000 Acta Mater. 48 2257
[2] ［2］Inagaki J, Sakurai Y, Nishimoto A 1993 Tetsu to Hagane 79 1273 (in Japanese)
[3] ［3］Urednieck M, Kirkaldy J S 1973 Z. Metal. Kd. 64 899
[4] ［4］Adachi Y, Arai M 1998 Mater. Sci. Enging. A 254 305
[5] ［5］Guttmmann M, Lepretre Y, Aubry A, Roch M J, Moreau T, Drillet P, Mataigne J M, Baudin H 1995 Proceeding of the 3rd International Conference on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech’95) Warrendale 1995 P295
[6] ［6］Zhang J H, Liu Z S, Qin Y Z. 1992 Acta Phys. Sin. 41 1474 (in Chinese)(张建华、刘增山、秦永志 1992 41 1474)
[7] ［7］Wang C P, Liu X J, Ohnuma I, Kainuma R, Ishida K 2002 Science 297 990
[8] ［8］Liu X R, Cao C D, Wei B B 2003 Chin. Phys. 12 1266
[9] ［9］Long W Y, Cai Q Z ,C L L,Wei B K 2005 Acta Phy. Sin. 54 256 (in Chinese) ［龙文元、蔡启舟、陈立亮、魏伯康 2005 54 256］
[10] ］Yao W J, Wei B B, 2003 Chin. Phys. 12 1272
[11] ］Yao W J, Yang C, Han X J, Chen M, Wei B B ,Guo Z Y 2003Acta Phys. Sin. 52 448 (in Chinese) ［姚文静、杨春、 韩秀君、陈民、魏丙泼、郭增元 2003 52 448］
[12] ］Liu Y, Wang F, Zhu C S, Wang Z P 2006 Acta Phys. Sin. 55 780 (in Chinese) ［路阳、王帆、朱昌盛、王智平 2006 55 780］
[13] ］Li M E,Yang G C, Zhou Y H 2005 Acta Phys. Sin. 54 454 (in Chinese) ［李梅娥、杨根仓、周尧和 2005 54 454］
[14] ］Shigeaki K,Takao Y 2002 Mater. Sci. Engng. A 338 44
[15] ］Wang D G, Shi Z Y, Zou L J 2003 Appl. Surf. Sci. 214 304
[16] ］Feutelais Y, Legendre B, de Avillze R R 2002 J. Alloys Comp. 346 211
[17] ］Su X P, Tang N Y, Toguri J M 2001 J. Alloys Comp. 325 129
[18] ］Chen Z W, Sharp R M,Gregory J T 1990 Mater. Sci. Technol. 12 1173
[19] ］Hu G X, Qian M G 1980 Metallography (Shanghai: Shanghai Scientific and Technical Publishers) p331—332(in Chinese)［胡庚祥、钱苗根 1980 金属学（上海：上海科学技术出版社）第331—332页］
[20] ］Liu B J 1995 Hot Dip Aluminizing for Steel and Iron (Beijing: metallurgical industry press) p145(in Chinese) ［刘邦津 1995 钢材的热浸镀铝 (北京：冶金工业出版社) 第145页］
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[1] ［1］Kato T, Nunome K, Kaneko K, Saka H 2000 Acta Mater. 48 2257
[2] ［2］Inagaki J, Sakurai Y, Nishimoto A 1993 Tetsu to Hagane 79 1273 (in Japanese)
[3] ［3］Urednieck M, Kirkaldy J S 1973 Z. Metal. Kd. 64 899
[4] ［4］Adachi Y, Arai M 1998 Mater. Sci. Enging. A 254 305
[5] ［5］Guttmmann M, Lepretre Y, Aubry A, Roch M J, Moreau T, Drillet P, Mataigne J M, Baudin H 1995 Proceeding of the 3rd International Conference on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech’95) Warrendale 1995 P295
[6] ［6］Zhang J H, Liu Z S, Qin Y Z. 1992 Acta Phys. Sin. 41 1474 (in Chinese)(张建华、刘增山、秦永志 1992 41 1474)
[7] ［7］Wang C P, Liu X J, Ohnuma I, Kainuma R, Ishida K 2002 Science 297 990
[8] ［8］Liu X R, Cao C D, Wei B B 2003 Chin. Phys. 12 1266
[9] ［9］Long W Y, Cai Q Z ,C L L,Wei B K 2005 Acta Phy. Sin. 54 256 (in Chinese) ［龙文元、蔡启舟、陈立亮、魏伯康 2005 54 256］
[10] ］Yao W J, Wei B B, 2003 Chin. Phys. 12 1272
[11] ］Yao W J, Yang C, Han X J, Chen M, Wei B B ,Guo Z Y 2003Acta Phys. Sin. 52 448 (in Chinese) ［姚文静、杨春、 韩秀君、陈民、魏丙泼、郭增元 2003 52 448］
[12] ］Liu Y, Wang F, Zhu C S, Wang Z P 2006 Acta Phys. Sin. 55 780 (in Chinese) ［路阳、王帆、朱昌盛、王智平 2006 55 780］
[13] ］Li M E,Yang G C, Zhou Y H 2005 Acta Phys. Sin. 54 454 (in Chinese) ［李梅娥、杨根仓、周尧和 2005 54 454］
[14] ］Shigeaki K,Takao Y 2002 Mater. Sci. Engng. A 338 44
[15] ］Wang D G, Shi Z Y, Zou L J 2003 Appl. Surf. Sci. 214 304
[16] ］Feutelais Y, Legendre B, de Avillze R R 2002 J. Alloys Comp. 346 211
[17] ］Su X P, Tang N Y, Toguri J M 2001 J. Alloys Comp. 325 129
[18] ］Chen Z W, Sharp R M,Gregory J T 1990 Mater. Sci. Technol. 12 1173
[19] ］Hu G X, Qian M G 1980 Metallography (Shanghai: Shanghai Scientific and Technical Publishers) p331—332(in Chinese)［胡庚祥、钱苗根 1980 金属学（上海：上海科学技术出版社）第331—332页］
[20] ］Liu B J 1995 Hot Dip Aluminizing for Steel and Iron (Beijing: metallurgical industry press) p145(in Chinese) ［刘邦津 1995 钢材的热浸镀铝 (北京：冶金工业出版社) 第145页］
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