电解液中Ti_(3)SiC_(2)颗粒含量对6063合金微弧氧化层组织及耐腐蚀性能的影响  

Effect of Ti_(3)SiC_(2)Particle Mass Concentration on Microstructure and Corrosion Resistance of Micro-arc Oxide Layer on 6063 Alloy

作　　者：刘涛 商剑(导师)[1] 范紫旭 李茜 LIU Tao;SHANG Jian;FAN Zixu;LI Qian(School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学材料科学与工程学院,锦州121001

出　　处：《机械工程材料》2025年第1期76-81,共6页Materials For Mechanical Engineering

基　　金：辽宁省教育厅科学计划项目(JYTMS20230845)。

摘　　要：配制由10 g·L^(-1)Na_(2)SiO_(3)、2 g·L^(-1)NaOH和xg·L^(-1)Ti3AlC2纳米颗粒(x=1,2,4,8)组成的电解液,在电解液中对6063合金进行微弧氧化,研究了电解液中Ti_(3)SiC_(2)质量浓度对微弧氧化层形貌、表面粗糙度、微区成分、物相组成和耐腐蚀性能的影响。结果表明:随着Ti_(3)SiC_(2)质量浓度增加,微弧氧化层中孔隙数量增多,微裂纹逐渐扩展,致密性降低;不同Ti_(3)SiC_(2)质量浓度下的微弧氧化层均含有铝、α-Al_(2)O_(3)、γ-Al_(2)O_(3)以及少量Ti_(3)SiC_(2)相;当Ti_(3)SiC_(2)质量浓度为4 g·L^(-1)时,微弧氧化层的表面粗糙度最小,自腐蚀电位最大,自腐蚀电流密度最小,容抗弧半径最大,相位角在中频时最高、最接近90°,频率趋于0时的阻抗模值最大,该条件下制备的微弧氧化层耐腐蚀性能最好。Electrolyte solutions composed of 10 g·L^(-1)Na_(2)SiO_(3),2 g·L^(-1)NaOH and x g·L^(-1)Ti3AlC2 nanopartides(x=1,2,4,8)were prepered.In the solution micro-arc oxidation was performed on 6063 alloy.The effects of the mass concentration of Ti_(3)SiC_(2)in the electrolyte solution on the morphology,surface roughness,micro-composition,phase composition and corrosion resistance of the micro-arc oxide layer were studied.The results show that with the increase of the mass concentration of Ti_(3)SiC_(2),the number of pores in the micro-arc oxide layer increased,the micro-cracks expanded gradually,and the density decreased.The phases of micro-arc oxide layers under different concentration of Ti_(3)SiC_(2)mainly consisted of aluminum,α-Al_(2)O_(3),γ-Al_(2)O_(3)and a small amount of Ti_(3)SiC_(2).When the mass concentration of Ti_(3)SiC_(2)was 4 g·L^(-1),the surface roughness of the micro-arc oxide layer was the smallest,the self-corrosion potential was the largest,the self-corrosion current density was the smallest,the arc resistance radius was the largest,the phase angle was the highest and closest to 90°at the medium frequency,and the inpedance modulus as the frequency approached 0 was the largest;the corrosion resistance of the micro-arc oxide layer prepared under this condition was the best.

关 键 词：铝合金 微弧氧化层 Ti_(3)SiC_(2) 耐腐蚀性能 

分 类 号：TG13[一般工业技术—材料科学与工程]