在5％ NaCl水溶液中通过浸泡和电化学测试研究铸态与挤压态Mg-5Y-7Gd- 1Nd-0.5Zr镁合金的腐蚀性能.铸态和挤压态Mg-5Y-7Gd- 1Nd-0.5Zr镁合金的平均晶粒尺寸分别为100 μm和15 μm.在腐蚀初期,铸态合金的腐蚀形貌为点蚀和少量丝状腐蚀,挤压态合金的腐蚀形貌为点蚀.挤压态合金的腐蚀速率大于铸态合金的腐蚀速率.包含稀土的第二相在合金中作为阴极,改善了合金的腐蚀性能.铸态与挤压态合金的腐蚀电位分别为-1.658V 和-1.591 V.探讨了铸态与挤压态合金腐蚀性能不同的原因.
The corrosion behaviours of Mg-5Y-7Gd-1Nd-0.5Zr magnesium alloys prepared by as-casting and extrusion were investigated in 5％ NaCl aqueous solution by immersion and electrochemical tests.The microstructure indicates the mean grain size of 15 μm for the extruded and 100 μm for the as-cast Mg-5Y-7Gd-1Nd-0.5Zr magnesium alloys.The corrosion morphology of as-cast sample shows pitting corrosion and little filiform corrosion,but that of the extruded sample shows pitting corrosion at the initial stage.The corrosion rate of extruded sample is higher than that of as-cast Mg-5Y-7Gd-1Nd-0.5Zr alloy according to the immersion test.The second phases containing RE acting as cathodes improve the corrosion properties.The corrosion potentials of as-cast and extruded Mg 5Y-7Gd-1Nd-0.5Zr alloys are -1.658 V and -1.591 V,respectively.The origins of the distinctive corrosion behavior of as-cast and extduded Mg-5Y-7Gd-1Nd-0.5Zr Mg alloys were discussed.
参考文献
| [1] | MAKAR G L;KRUGER J .Corrosion of magnesium[J].International Materials Reviews,1993,38:138-153. |
| [2] | Guang Ling Song;Andrej Atrens .Corrosion mechanisms of magnesium alloys[J].Advanced Engineering Materials,1999(1):11-33. |
| [3] | Guongling Song;Andrej Atrens .Understanding Magnesium Corrosion: A Framework for Improved Alloy Performance[J].Advanced Engineering Materials,2003(12):837-858. |
| [4] | G. Song;A. Atrens .Recent Insights into the Mechanism of Magnesium Corrosion and Research Suggestions[J].Advanced Engineering Materials,2007(3):177-183. |
| [5] | CORR(E)A E C S;AGUILAR M T P;SILVA E M;CETLIN P R .The effect of sequential tensile end cyclic torsion straining on work hardening of steel and brass[J].Journal of Materials Processing Technology,2003,142(01):282288. |
| [6] | L. Li;H. Zhang;J. Zhou;J. Duszczyk;G.Y. Li;Z.H. Zhong .Numerical and experimental study on the extrusion through a porthole die to produce a hollow magnesium profile with longitudinal weld seams[J].Materials & design,2008(6):1190-1198. |
| [7] | G. Ben Hamu;D. Eliezer;L. Wagner .The relation between severe plastic deformation microstructure and corrosion behavior of AZ31 magnesium alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):222-229. |
| [8] | SONG G;ATRENS A;STJOHN D;NAIRN J,LI Y .The electrochemical corrosion of pure magnesium in 1 N NaCl[J].Corrosion Science,1997,39(05):855-875. |
| [9] | J. G. Brunner;J. May;H. W. Hoppel;M. Goken;S. Virtanen .Localized corrosion of ultrafine-grained Al-Mg model alloys[J].Electrochimica Acta,2010(6):1966-1970. |
| [10] | YANG Li-jing;WEI Ying-hua;HOU Li-feng;ZHANG Di .Corrosion behaviour of die-east AZ91 D magnesium alloy in aqueous sulphate solutions[J].Corrosion Science,2010,52(02):345-351. |
| [11] | M. Ben-Haroush;G. Ben-Hamu;D. Eliezer;L. Wagner .The relation between microstructure and corrosion behavior of AZ80 Mg alloy following different extrusion temperatures[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(6):1766-1778. |
| [12] | G. Ben Hamu;D. Eliezer;L. Wagner .The relation between severe plastic deformation microstructure and corrosion behavior of AZ31 magnesium alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):222-229. |
| [13] | LI Yongjun,ZHANG Kui,ZHANG Ya,LI Xinggang,MA Minglong.Microstructural evolution and mechanical properties of Mg-5Y-5Gd-xNd-0.5Zr magnesium alloys at different states[J].稀有金属（英文版）,2010(03):317-322. |
| [14] | G. Ben-Hamu;D. Eliezer;K.S. Shi .The relation between microstructure and corrosion behavior of Mg-Y-RE-Zr alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):269-276. |
| [15] | ZHANG Kin;ZHANG Kui;LI Xing-gang;WANG Cons,LI Hong-wei, WANG Chang-shun, DENG Xia .Corrosion and electrochemical behavior of as-cast Mg-5Y-7Gd-1Nd-0.5Zr magnesium alloys in 5wt.％ NaCl aqueous solution[J].Progress in Natural Science:Materials International,2011,21(04):314-321. |
| [16] | LI Zhuo-qun,SHAN Da-yong,CHEN Rong-shi,KE Wei,HAN En-hou.Corrosion behavior of WE54 magnesium alloy in 3.5%NaCl solution[J].中国有色金属学会会刊（英文版）,2006(z3):1806-1809. |
| [17] | Ngoc-Chang Quach;Peter J. Uggowitzer;Patrik Schmutz .Corrosion behaviour of an Mg—Y—RE alloy used in biomedical applications studied by electrochemical techniques[J].Comptes Rendus Chimie,2008(9):1043-1054. |
| [18] | ZHANG Tao;MENG Guo-zhe;SHAO Ya-wei;CUI Zhong-yu,WANG Fu-hui .Corrosion of hot extrusion AZ91 magnesium alloy.Part Ⅱ:Effect of rare earth element neodymium (Nd) on the corrosion behavior of extruded alloy[J].Corrosion Science,2011,53(09):2934-2942. |
| [19] | POORQASEMI E;ABOOTALEBI O;PEIKARI M;HAQDAR F .Investigating accuracy of the Tafel extrapolation method in HCI solutions[J].Corrosion Science,2009,51:1043-1054. |
| [20] | INOUE H;SUGAHARA K;YAMAMOTO A;TSUBAKINO H .Corrosion rate of magnesium and its alloys in buffered chloride solutions[J].Corrosion Science,2002,44(03):603-610. |
| [21] | Tao Zhang;Yawei Shao;Guozhe Meng;Zhongyu Cui;Fuhui Wang .Corrosion of hot extrusion AZ91 magnesium alloy: I-relation between the microstructure and corrosion behavior[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2011(5):1960-1968. |
| [22] | SONG Dan;MA Ai-bin;JIANG Jing-hua;LIN Ping-hua YANG Dong-hui FAN Jun-feng .Corrosion behavior of equal-channel-angular-pressed pure magnesium in NaCl aqueous solution[J].Corrosion Science,2010,52(02):481-490. |
| [23] | Yingwei Song;Dayong Shan;Rongshi Chen;En-Hou Han .Corrosion characterization of Mg-8Li alloy in NaCl solution[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2009(5):1087-1094. |
| [24] | N. Birbilis;M.K. Cavanaugh;A.D. Sudholz;S.M. Zhu;M.A.Easton;M.A.Gibson .A combined neural network and mechanistic approach for the prediction of corrosion rate and yield strength of magnesium-rare earth alloys[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2011(1):168-176. |
| [25] | Michiaki Yamasaki;Naoyuki Hayashi;Shogo Izumi;Yoshihito Kawamura .Corrosion behavior of rapidly solidified Mg-Zn-rare earth element alloys in NaCl solution[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2007(1):255-262. |
| [26] | HARA N;KOBAYASHI Y;KAGAYA D;AKAO N .Formation and breakdown of surface films on magnesium and its alloys in aqueos solutions[J].Corrosion Science,2007,49:166-175. |
| [27] | Chang JW;Peng LM;Guo XW;Atrens A;Fu PH;Ding WJ;Wang XS .Comparison of the corrosion behaviour in 5% NaCl solution of Mg alloys NZ30K and AZ91D[J].Journal of Applied Electrochemistry,2008(2):207-214. |
| [28] | A. Pardo;M.C. Merino;A.E. Coy;R. Arrabal;F. Viejo;E. Matykina .Corrosion behaviour of magnesium/aluminium alloys in 3.5 wt.% NaCl[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(3):823-834. |
| [29] | Nobuyoshi Hara;Yasuhiro Kobayashi;Daisuke Kagaya;Noboru Akao .Formation and breakdown of surface films on magnesium and its alloys in aqueous solutions[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2007(1):166-175. |
| [30] | V. Neubert;I. Stulikova;B. Smola;B.L. Mordike;M. Vlach;A. Bakkar;J. Pelcova .Thermal stability and corrosion behaviour of Mg–Y–Nd and Mg–Tb–Nd alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1-2):329-333. |
| [31] | NAKTSUGAWA I;TAKAYASU H;ARAKI K;TSUKEDA T .Electrochemical corrosion studies of thixomolded AZ91D in sodium chloride solution[J].Materials Science Forum,2003,419:845-850. |
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