取代装饰铬的纳米Sn-Co-X合金(英文)  

Nano-crystalline Sn-Co-X Alloy Alternative to Decorative Chromium Plating

作　　者：惠文华 顾艳红[2] 刘家俊[3] 孟繁娟[4] 张志军[4] 李月亮[5] 李展平[5] 曹立礼[5] 张晓寒[4] 张庆 

机构地区：[1]美国3S公司,美国新泽西州尤英08628 [2]阿拉斯加大学机械工程系,美国阿拉斯加州朱诺99812 [3]清华大学机械工程系,北京100083 [4]清华大学热能工程系,北京100083 [5]清华大学分析测试中心,北京100083

出　　处：《中国表面工程》2012年第3期1-5,共5页China Surface Engineering

摘　　要：装饰铬在全世界的市场需求量是硬铬的3倍,长期以来镀铬工艺是众所周知的有毒工艺,由于电镀纳米Sn-Co-X合金具有与Cr6+非常接近的颜色及更好的耐腐蚀性,且对环境和人体安全,是取代Cr6+与Cr3+的极好选择。纳米Sn-Co-X的耐腐蚀性优于Cr6+和Cr3+,更优于常规晶态的Sn-Co合金。用扫描电镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱仪(XPS)和原子发射光谱(AES)对纳米Sn-Co-X合金的微观结构及腐蚀前后的表层变化进行了分析,阐述了纳米Sn-Co-X合金优异的耐腐蚀性机理。Decorative chromium demand in the worldwide market is more than three times of hard chromium.However,chromium plating process has long been known to be hazardous.The corrosion resistance of nano-crystalline Sn-Co-X alloy intended as an alternative for decorative chromium has been studied.The corrosion resistance of Sn-Co-X is better than trivalent chromium and hexavalent chromium,and it is much better than coarser gained Sn-Co alloy.The microstructures of Sn-Co-X alloy were analyzed by scanning electron microscope（SEM）,transmission electron microscope（TEM）,X-ray photoelectron spectroscopy（XPS） and atomic emission spectrometry（AES） before and after corrosion.The mechanism of its excellent corrosion resistance was described.

关 键 词：纳米晶粒 Sn-Co-X合金 替代装饰铬镀层 镀铬 

分 类 号：TG174.441[金属学及工艺—金属表面处理]