Cu-11Fe-4Cr原位复合材料在HSO_3^-和/或Cl^-介质中的耐蚀性  

Corrosion resistance of Cu-11Fe-4Cr in-situ composites in HSO_3^-/Cl^- media

作　　者：高青[1] 毛磊[1] 马静[1] 刁美燕[1] 阎冬青[1] 

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050054

出　　处：《河北科技大学学报》2007年第3期222-225,F0003,共5页Journal of Hebei University of Science and Technology

基　　金：河北省自然科学基金资助项目(503372)

摘　　要：采用选择腐蚀技术,提取了Cu-11Fe-4Cr原位复合材料中Fe-Cr纤维,并测定了其电极电位。通过间歇式盐水喷雾实验和极化曲线测定,研究了Cu-11Fe-4Cr原位复合材料在HSO3-和/或Cl-介质中的腐蚀行为。用扫描电镜对腐蚀产物和腐蚀表面进行分析。结果表明,Cu-11Fe-4Cr原位复合材料中,E(Cu)<E(Fe-Cr),故Cu基体为阳极,而第二相Fe-Cr纤维为阴极。Cu-11Fe-4Cr原位复合材料在(NaHSO3+NaCl)和NaHSO3介质中的E(Fe-Cr)-E(Cu)显著高于NaCl介质中的E(Fe-Cr)-E(Cu),Cu-11Fe-4Cr原位复合材料在NaCl介质中的腐蚀失重最小,在NaCl介质中具有良好的耐蚀性。The Fe-Cr fibers are extracted from Cu-llFe-4Cr in-situ composites by using a selective etching technique,and the electrode potential of the fibers is determinated. By means of Salt spray tests and polarization curves measurements, the corrosion behavior of Cu-llFe-4Cr composites in HSO^-3 and/or C1 media is studied. The corrosion products and corrosion surface are analysed by scanning electron microscope. The results show that In Cu-llFe-4Cr in situ composites,E（Cu）〈E（Fe-Cr）, so ma- trix metal Cu is anode, while Fe-Cr fiber is cathode. E Fe-Cr-E Cu in （NaHSO3＋NaC1） and NaHSO3 media is obviously higher than that in NaC1 media, so the corrosion weight loss in NaC1 media is least, the corrosion resistance in NaC1 media is excellent.

关 键 词：原位复合材料 Fe-Cr纤维 耐蚀性 

分 类 号：TG172.3[金属学及工艺—金属表面处理]