用静态失重法、动电位极化曲线和电化学交流阻抗谱等方法研究了Mg-11Li-3Al-0.55RE合金在碱性NaCl溶液中的腐蚀行为,结果表明:在碱性NaCl溶液中,随着Cl<'-浓度的升高,合金的平均腐蚀速率增大,腐蚀电流增大,体系中Rsol、Rt、Rf减小,腐蚀严重;当溶液的碱性增强时,合金的点蚀电位正移,表面膜钝化作用增强,Rf提高,同时Rt和Rsol增大,减缓了腐蚀的进行;在合金表面生成的腐蚀产物主要成分为Mg(OH)2、Al2O3和Li2O2;Mg-11Li-3Al-0.5RE合金的腐蚀以点蚀为主,逐渐向基体内部和四周扩大,形成较深的蚀坑.
参考文献
| [1] | MA Chunjiang,ZHANG Di,ZHANG Guoding,TAN Jin-ing,Mg-Li matrix composites,Rare Metal Materials and Engineering,27(3),125(1998)(马春江,张荻,张国定,覃继宁,Mg-Li基复合材料,稀有金属材料与工程,27(3),125(1998)) |
| [2] | S.J.Wang,G.Q.Wu,R.H.Li,G.X.Luo,Z.Huang,Mi-crostructures and mechanical properties of 5 wt.% Al2Yp/Mg-Li composite,Mater.Lett.,60,1863(2006) |
| [3] | MAO Weimin,YIN Aimei,ZHONG Xueyou,Compress-ing deformation and microstructure of semi-solid AZ91D magnesium alloy,Chinese Journal of Materials Research,19(4); 401(2005)(毛卫民,殷爱美,钟雪友,半固态AZ91D镁合金的压缩变形和显微组织,材料研究学报,19(4),401(2005)) |
| [4] | Gaia Ballerini,Ugo Bardi,Roberto Bignucolo,Giuseppe Ceraolo,About some corrosion mechanisms of AZ91D magnesium alloy,Corro Sci.,47,2173(2005) |
| [5] | ZENG Rongchang,HAN Enhou,KE Wei,LIU Lu,XU Yongbo,Corrosion fatigue of as-extruded AM60 magne-sium alloy,Chinese Journal of Materials Research,19(1),1(2005)(曾荣昌,韩恩厚,柯伟,刘路,徐永波,挤压镁合金AM60的腐蚀疲劳,材料研究学报,19(1),1(2005)) |
| [6] | Tien Ohan Chang,Jian Yih Wang,Ohun Len Ohu,Me-chanical properties and microstruetures of variotm Mg-Li alloys,Mater.Lett.,60,3272(2006) |
| [7] | M.V.Kral,B.O.Muddle,J.F.Nie,Crystallography of the bcc/hcp transformation in Mg-SLi alloy,Mat.Sci.Eng.,460-461,227(2007) |
| [8] | M.L.Zhang,Y.D.Yan,Z.Y.Hou,L.A.Fan,Z.Chen,D.X.Tang,An electrochemical method for the preparation of Mg-Li alloys at low temperature molten salt system,J.Alloy.Comp,09,56(2006) |
| [9] | YANG Guangyu,HAO Qitang,JIE Wanqi,Study star tus of Mg-Li system alloys,Foundry Technology,25(1),19(2004) (杨光昱,郝启堂,介万奇,镁锂系合金的研究现状,铸造技术,25(1),19(2004)) |
| [10] | Z.Trojanova,Z.Drozd,P.Lukac,F.Chmelik,Deformation behaviour of Mg-Li alloys at elevated temperature,Mat.Sci.Eng.,410-411,148(2005) |
| [11] | T.Liu,W.Zhang,S.D.Wu,C.B.Jiang,S.X.Li,Y.B.Xu,Me-chanical properties of a two-phaso alloy Mg-8%Li-1%Al processed by equal channel angular pressing,Mat.Sci.Eng.,360,345(2003) |
| [12] | O.Sivakesavam,Y.V.R.K.Prasad,Characteristics of su-perplasticity domain in the processing map for hot work-ing of as-cest Mg-11.5Li-1.5Al alloy,Mat.Sci.Eng.,323,270(2002) |
| [13] | Wang Tao,Zhang Milin,Niu Zhongyi,Liu Bin,Influence of rare earth elements on mierostructure and mechanical properties of Mg-Li alloys,J.Rare Earth,24,797(2006) |
| [14] | ZHANG Hauru,HAO Yuan,XU Weijun,Effects of RE,Sb and Si additions on corrosion rate,of AZ91D-based alloys in NaCl Solution,Research Studies on Foundry Equip-ment,(1),28(2004)(张汉茹,郝远,徐卫军,NaCl溶液中AZ91D的腐蚀性能-RE与sb及si对AZ91D合金在NaCl溶液中腐蚀速率的影 |
| [15] | S.Mathieu,C.Rapin,J.Hazan,Corrosion behavior of high pressure die-cast and semisolid cast AZ91D alloys,Corro.Sci.,44,2737(2002) |
| [16] | P.L.Bonora,M.Andrei,A.Eliezer,Corrosion behavior of stressed magnesium alloys,Corro.Sci.,44,729(2002) |
| [17] | Genevieve Baril,Nadine Pebere,The corrosion of pure magnesium in aerated and deaerated sodium sulphate so-lutions,Corro.Sci.,43,471(2001) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%