微弧氧化电参数对A7N01S-T5铝合金耐腐蚀性能的影响  

Effect of Micro-arc Oxidation Parameters on Corrosion Resistance Property of A7N01S-T5 Al Alloy

作　　者：万里[1] 魏书波[1] 王圣洁[2] 王雪飞[3] 

机构地区：[1]南车青岛四方机车车辆股份有限公司,山东青岛266111 [2]西南交通大学生命科学与工程学院,四川成都610031 [3]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《热加工工艺》2016年第4期37-39,42,共4页Hot Working Technology

基　　金：车体铝合金典型结构腐蚀环境疲劳可靠性能研究基金资助项目(2012H04026)

摘　　要：采用单因素法,对微弧氧化的主要电参数对A7N01S-T5铝合金微弧氧化膜层性能的影响进行研究。结果表明,随电流密度和脉冲频率的增加,膜层厚度和粗糙度均增加。随占空比的增加,膜层厚度和粗糙度均先降低后增加。腐蚀电流和腐蚀电位变化较复杂。选择电参数为电流密度5 A/dm2,脉冲频率200 Hz,占空比22.5%。微弧氧化处理后试样的耐腐蚀性明显优于未氧化处理的试样。The effects of micro-arc oxidation parameters on the property of micro-arc oxidation coating on A7N01 S-T5 AI alloy was researched by single-factor method. The results show that with the increase of current density and pulse frequency, the thickness and surface roughness increase. With the increase of duty ratio, the thickness and surface roughness decrease and then increase. The change of corrosion current and corrosion potential is complicated. The micro-arc oxidation parameter is selected as current density 5 AJdm2, pulse frequency 200 Hz, duty ratio 22.5%. The corrosion resistance of samples treated by micro-arc oxidation is better than that of samples without oxidation treatment.

关 键 词：微弧氧化 电参数 A7N01S-T5铝合金 耐腐蚀性能 

分 类 号：TG174[金属学及工艺—金属表面处理]