Reoxidation process and corrosion behavior of TA15 alloy by laser ablation

作     者：Bo-Wen Liu Gao-Yang Mi Chun-Ming Wang Bo-Wen Liu;Gao-Yang Mi;Chun-Ming Wang

作者机构：School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第4期

页      面：865-876页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51861165202 and 51705173) the Science and Technology Planning Project of Guangdong Province(No.2017B090913001) 

主　　题：Laser ablation TA15 alloy Reoxidation process Corrosion behavior Elemental analysis 

摘      要：The thermal oxide layer formed of TA15 alloy has poor corrosion *** this paper,the changes of the elements and components on the surface after laser ablation with different energy densities(E) were *** formation process and corrosion behavior of laser-generated oxide layer were *** E increases,the oxygen content decreases from 8.52% to 5.43% and then increases to 11.89%.The surface oxide layer changes from TiO_(2)(R)(i.e.,rutile) to Ti_(2) O_(3)+TiO_(2)(R) and finally becomes TiO_(2)(R)+TiO_(2)(A)(i.e.,anatase).The TiO_(2)(R) gasification was confirmed by calculating the surface temperature *** surface reoxidation process was illustrated by a thermodynamically calculated ΔGT(i.e.,the Gibbs free energy changes with temperature).When E≥17.5 J·cm^(-2),the oxide layer exhibits an agitated morphology,and oxide falls off at the *** E increases,the corrosion rate decreases first and then *** energy density of 8.75 J·cm^(-2),the surface corrosion rate was 20.43 times slower than that of the untreated *** impedance spectrum and equivalent resistance results also prove the best corrosion resistance at 8.75 J·cm^(-2).The corrosion behavior of the oxide layer is analyzed from the properties of the oxide layer components and the reaction products with the electrolyte.