铝合金空心阴极放电辅助离子氧化技术的研究  

Plasma Oxidation of Aluminium Alloy with Hollow Cathode Discharge

作　　者：李杨[1] 张念武[2] 徐惠忠[1] 邱剑勋[1] 赵相金[1] 王硕[1] 

机构地区：[1]烟台大学环境与材料工程学院,山东烟台264005 [2]中国船级社秦皇岛分社,河北秦皇岛066002

出　　处：《烟台大学学报（自然科学与工程版）》2014年第4期271-274,共4页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：国家自然科学基金资助项目(51301149;51101133;51101134)

摘　　要：针对海洋环境条件下铝合金点蚀比较严重问题,提出了基于空心阴极效应的离子氧化技术制备耐蚀保护层技术.在低频双极脉冲放电装置中进行铝合金氧化改性处理,温度控制在450-550℃范围内,氧化时间为3 h.采用扫描电子显微镜（SEM）和X射线光电子能谱（XPS）等测试手段对氧化层进行分析表征,实验表明可在铝合金表面制备20-500 nm厚的致密光滑的氧化层（Al2O3）.在3.5%NaCl溶液中对未处理和离子氧化样品进行浸泡腐蚀实验,经过浸泡20 d后,未处理样品受到严重腐蚀,而氧化样品表面无明显腐蚀现象.由此可见空心阴极放电辅助离子氧化技术可以显著提高铝合金的耐点蚀性能.Aluminium alloy is susceptible to pit corrosion in the saline water environment. It is presented that plasma oxidation with hollow cathode effect may be used to produce thicker oxide layer which can improve corrosion resistance. Plasma oxidizing is carried out by using a low-frequency pulse excited plasma unit. The aluminum alloy samples are oxidized at 450 - 550 ℃ for 3 h. The modified layer is characterized by X-ray photoelectron spectroscopy and scanning electron microscopy. The results show that oxide layers of 20 -500 nm thick is formed on the surface of aluminium alloy. Immersion experiments are carried out to test the effect of oxidation on the corrosion resistance of the samples. After immersion in 3.5% NaCl solution for 20 d, severe corrosion occurrs on the untreated surface while no evident corrosion is observed for the oxidized sample. Plasma oxidation with hollow cathode discharge can improve the pitting corrosion resistance of the aluminium alloy.

关 键 词：铝合金 氧化 等离子体 点蚀 

分 类 号：TG178[金属学及工艺—金属表面处理]