超细晶纯钛微弧氧化表面润湿性和耐腐蚀性能研究  

Wettability and Corrosion Resistance of Ultrafine-Grained Titanium by Micro-arc Oxidation

作　　者：徐琳[1] 丁建宁[1,2] 许晓静[1] 牛小丫[1] 李伯全[1] 程广贵[1] 

机构地区：[1]江苏大学,江苏镇江212013 [2]常州大学,江苏常州213164

出　　处：《稀有金属材料与工程》2015年第12期3100-3104,共5页Rare Metal Materials and Engineering

基　　金：江苏省高校自然基金重大项目(11KJA430004);江苏省高校自然基金(12KJD460002);江苏大学研究生科研创新计划项目(1291110038)

摘　　要：以纯钛为原料,经等通道转角大应变加工处理得到超细晶纯钛,采用微弧氧化法对纯钛和超细晶纯钛表面进行了改性处理,研究了改性处理对样品的表面形貌、润湿性和耐腐蚀性等的影响。实验发现微弧氧化处理后,虽纯钛及超细晶纯钛表面均形成多孔氧化膜层、接触角减小、表面粗糙度和表面能提高,但与纯钛相比,超细晶纯钛腐蚀速率与电流密度较纯钛的更小。因此,经微弧氧化法改性后,超细晶纯钛比纯钛更适合应用于医用植入物领域。The ultrafine-grained titanium was fabricated with conventional titanium as raw material by equal channel angular pressing(ECAP).The study,via modification on the surfaces of conventional titanium and ultrafine-grained titanium in the way of micro-arc oxidation(MAO),analyzed the influence of modification on the surface morphology,wetting properties and corrosion resistance of the MAO films.It has been found experimentally that the surfaces of conventional titanium and ultrafine-grained titanium after modification are both porous structure,which have rougher surface,smaller contact angle,and higher surface energy.However,compared with that of conventional titanium,the micro-arc oxidized surface of ultrafine-grained titanium exhibits lower corrosion rate and current density as well as better corrosion resistance.Therefore,the ultrafine-grained titanium after modification is more suitable than conventional titanium in medical implants fields.

关 键 词：超细晶纯钛 微弧氧化 润湿性 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]