采用选择腐蚀技术,提取了铜基原位复合材料中纤维相,并测定其电极电位.通过间歇式盐水喷雾试验和极化曲线测定,研究了Cu-15Fe、Cu-14Fe-1Cr、Cu-13Fe-2Cr、Cu-11Fe-4Cr四种原位复合材料在NaHSO3+NaCl混合介质中的腐蚀行为.同时用扫描电镜对腐蚀产物和腐蚀表面进行分析.结果表明,Cu-15Fe原位复合材料在NaHSO3+NaCl介质中,腐蚀电位EFe＜ECu,故Cu基体为阴极,Fe相纤维为阳极.Cr元素的加入,使Fe-Cr相纤维为阴极,基体铜为阳极.随着Cr元素含量的增加,EFe-Cr正向移动,致钝电位负移,维钝电流密度降低,钝化区范围增大,EFe-Cr-ECu降低,材料的耐蚀性提高.
参考文献
| [1] | Verhoeven J D;Chumbley L S;Laabs F C et al.Measurement of filament spacingin deformation processed Cu-Nb alloys[J].Acta Metallurgica Et Materialia,1991,39(11):2825-2834. |
| [2] | Leprince-Wang Y.;Han K.;Huang Y.;Yu-Zhang K. .Microstructure in Cu-Nb microcomposites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):214-223. |
| [3] | Sun Shoujin .Structures and residual stresses of Cr filaments in Cu-15Cr in situ composites[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2001,32(05):1225-1232. |
| [4] | H.G.Suzukit,J.Ma,K.Mihara,S.Sakai,S.Sun.Effect of alloying elements on mechanical properties in Cu-15%Cr in-situ composites[J].中国有色金属学会会刊(英文版),2004(02):284-290. |
| [5] | Lee K D .Effect of oxidation on the creep behaviour of copper-chromium in situ composites[J].Composites Part A:Applied Science and Manufacturing,2003,34:1235-1244. |
| [6] | Biselli C;Morris D G .Microstructure and strength of Cu-Fe in situ composite after very high drawing strains[J].Acta Materials,1996,44(02):493-504. |
| [7] | 胡茂圃.腐蚀电化学[M].北京:冶金工业出版社,1991:265-267. |
| [8] | 高青,毛磊.Cu-Fe原位复合材料在模拟污染环境中的大气腐蚀研究[J].腐蚀与防护,2003(09):371-375. |
| [9] | Cr元素对Cu-Fe原位复合材料的电化学腐蚀行为的影响[J].全面腐蚀控制,2005(03):19-21. |
| [10] | 陈华辉;邓海金.现代复合材料[M].北京:中国物资出版社,1997:78-79. |
| [11] | 杨德钧;沈卓身.金属腐蚀学[M].北京:冶金工业出版社,1999:283-284. |
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