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.
出处
《河北科技大学学报》
CAS
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)
