六偏磷酸钠浓度对微弧氧化涂层结构和性能的影响  

The effects of the sodium hexametaphosphate concentration on the structure and properties of the micro-arc oxidation coatings

作　　者：陈泽军 彭帅武 孙永花 裴森 杭瑞强 姚晓红[1] CHEN Zejun;PENG Shuaiwu;SUN Yonghua;PEI Sen;HANG Ruiqiang;YAO Xiaohong(College Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]太原理工大学安全与应急管理工程学院,太原030024

出　　处：《功能材料》2025年第3期3225-3230,共6页Journal of Functional Materials

基　　金：山西省基础研究计划青年科学研究项目(202103021223102,202203021222127)。

摘　　要：采用微弧氧化(MAO)技术在6061铝合金表面制备复合陶瓷层,研究不同含量的六偏磷酸钠(NaPO_(3))6对陶瓷层结构以及性能的影响。采用扫描电镜、X射线衍射仪(XRD)、表面轮廓仪、摩擦磨损实验、电化学实验研究涂层结构和性能。研究结果表明,随着电解液中(NaPO_(3))_(6)浓度的升高,陶瓷层的厚度增加,其中当(NaPO_(3))_(6)浓度为15 g/L时,陶瓷层的厚度达到8.7μm。XRD结果表明陶瓷层主要由γ-Al_(2)O_(3)和α-Al_(2)O_(3)组成。随着六偏磷酸钠浓度的增加,陶瓷层的耐腐蚀性能和摩擦磨损性能增加。其中比磨损率从6061铝合金的2.554×10^(-2)mm^(3)/(N·m)下降到M-15的2.316×10^(-3)mm^(3)/(N·m);自腐蚀电流密度从6061铝合金的1.335×10^(-5)A/cm^(2)下降到M-15的3.232×10^(-8)A/cm^(2)。The surface of the 6061 Al alloy was treated with a compound ceramic layer using micro-arc oxidation(MAO)technology.The influence on the structure and performance of the ceramic layer was investigated by different concentrations of(NaPO_(3))_(6).Using SEM,X-ray diffractometer,surface profile,friction and abrasion tests,and electrochemistry tests to examine the structure and properties of the MAO layer.The results demonstrated that the thickness of the ceramic layer increased in conjunction with an elevation in the concentration of(NaPO_(3))_(6) within the electrolyte.The ceramic layer attained a thickness of 8.7μm when the concentration o f(NaPO_(3))6 was 15 g/L.The ceramic layer was mainly composed of γ-Al_(2)O_(3)and α-Al_(2)O_(3).The ceramic layer's corrosion resistance and friction wear performance increased with sodium hexametaphosphate concentration.The specific wear rate decreased from 2.554×10^(-2)mm^(3)(N·m)of the 6061 aluminum alloy to 2.316×10^(-3)mm^(3)(N·m)of the M-15.The self-corrosion current notably declined from 1.335×10^(-5)A/cm^(2)for the 6061 aluminum alloy to 3.232×10^(-8)A/cm^(2)for M-15.

关 键 词：6061铝合金 微弧氧化 六偏磷酸钠 摩擦磨损性能 耐腐蚀性能 

分 类 号：TB332[一般工业技术—材料科学与工程]