Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第18卷    第8期    总第113期    2008年8月

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文章编号:1004-0609(2008)08-1389-06
LY12微弧氧化膜在不同水溶液中的摩擦学行为
丁红燕1, 2,戴振东2,周 飞2,KUIRY S C 3

(1. 淮阴工学院 机械工程系,淮安 223003;
2. 南京航天航空大学 高新技术研究院,南京 210016;
3. Center for Tribology, INC Campbell, CA 95008, USA
)

摘 要:  

以球面接触方式,在500 μm振幅下,研究LY12铝合金微弧氧化膜在人造雨水、人造海水和纯净水等3种介质中的往复滑动摩擦学行为,研究载荷、频率以及环境介质对摩擦因数和磨损质量损失的影响。结果表明,氧化膜在3种水溶液中的摩擦因数均随着频率的升高而下降,随载荷的上升则呈不同的变化趋势;摩擦因数按照以下顺序递减:雨水、纯水、海水,说明水溶液对摩擦因数的影响,尤其是海水显著的减摩作用;低频时,纯水中的磨损体积最大;随着频率上升,由于Cl对基体的腐蚀效应以及对磨损的促进作用,导致LY12微弧氧化膜在海水和雨水中的磨损量快速上升而超过纯水中的磨损量,使得腐蚀磨损呈正的交互作用。

 

关键词: 铝合金;微弧氧化;腐蚀磨损;摩擦因数

Tribological behaviors of micro-arc oxidation film of LY12 in different aqueous
DING Hong-yan1, 2, DAI Zhen-dong2, ZHOU Fei2, SKUIRY S C3

1. Department of Mechanical Engineering, Huaiyin Institute of Technology, Huaian 223003, China;
2. Academy of Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
3. Center for Tribology, INC Campbell, CA 95008, USA

Abstract:The reciprocating wear behavior of an MAO film of aluminum alloy LY12 flat was investigated in artificial rain water, artificial sea water and distilled water by using the ball-on–flat configuration with 500 μm amplitude. The influences of the load, frequency and aqueous media on the friction coefficient and wear loss of the film were analyzed. The results show that the friction coefficient decreases with increasing the frequency, while it presents different varied trends in the three aqueous as the load increases. The friction coefficient in different media descends as follows: rain water, distilled water and sea water, which indicates the influence of aqueous on the friction coefficient, especially the remarkable reduction effect of sea water on the friction coefficient of MAO-LY12 film. The wear loss of MAO-LY12 film in the distilled water is the largest when run in low frequency, whereas it increases rapidly in rain and sea water when run in high frequency due to the corrosion action of Cl− ion and its accelerating effect to the wear, and results in larger loss than in the distilled water, which implies a positive synergism between corrosion and wear.

 

Key words: aluminum alloy; micro-arc oxidation; corrosion wear; friction coefficient

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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