铝合金等离子体氧化放电特性及陶瓷膜层耐腐蚀性能研究  

Studies on Corrosion Resistance of Ceramic Coating on Aluminum Alloy and Discharge Characteristics of PEO

作　　者：王丽[1] 陈砺[2] 杨栋栋[1] 

机构地区：[1]广东石油化工学院化工与环境工程学院,广东茂名525000 [2]华南理工大学化学与化工学院,广东广州510640

出　　处：《电镀与精饰》2013年第5期5-8,共4页Plating & Finishing

基　　金：广东省自然科学基金资助项目(No.S2011040001765);广东石油化工学院博士启动项目(No.511019);广东高校石油化工污染控制与清洁生产工程技术开发中心资助项目(No.203517)

摘　　要：采用等离子体电解氧化技术在AA6063铝合金表面制备陶瓷膜层,拟提高铝合金耐腐蚀性能。对等离子体氧化过程电流电压特性及击穿放电特性进行了分析和探讨,采用光发射光谱仪对等离子体氧化放电阶段等离子体活性组分进行分析,对陶瓷膜层的耐腐蚀性能进行了研究。结果表明,相比于基体而言,等离子体氧化陶瓷膜层腐蚀电位正移了0.86V。在470V时,等离子体活性物种主要由Al、Al+、Mg、O+、Hα、Hβ、OH、Na和K组成,且金属活性物种先被激发。这些活性物种中金属元素及工作电极表面产生的气体的原子和分子对等离子体场能量的稳定起到关键的作用。Ceramic coating was prepared on AA6063 aluminum alloy by plasma electrolytic oxidation （PEO） to increase its corrosion resistance. Current-voltage and breakdown discharge characteristics during the PEO process were analyzed and discussed. Plasma active species at discharge stage were investigated by optical emission spectroscopy（OES） ,and corrosion resistance of the PEO ceramic coating was also researched. Results showed that corrosion potential of the PEO ceramic coating shifted to positive direction with 0.86 V compared to that of the substrate. At 470 V, the plasma active species were composed of AI, Al＋ , Mg, O ＋ , Hα, Hβ, OH, Na and K. On which, the metal active species were excited at first. Atoms and molecules generated on electrode surface as well as the metal elements played important role on the stability of plasma field energy.

关 键 词：铝合金 等离子体电解氧化 耐腐蚀性能 放电特性 

分 类 号：TG174.451[金属学及工艺—金属表面处理]