(1. 淮陰工學院 機械工程系，淮安 223003；
2. 南京航天航空大學 高新技術(shù)研究院，南京 210016；
3. Center for Tribology, INC Campbell, CA 95008, USA)
摘 要:
以球−面接觸方式，在500 μm振幅下，研究LY12鋁合金微弧氧化膜在人造雨水、人造海水和純凈水等3種介質(zhì)中的往復(fù)滑動摩擦學行為，研究載荷、頻率以及環(huán)境介質(zhì)對摩擦因數(shù)和磨損質(zhì)量損失的影響。結(jié)果表明，氧化膜在3種水溶液中的摩擦因數(shù)均隨著頻率的升高而下降，隨載荷的上升則呈不同的變化趨勢；摩擦因數(shù)按照以下順序遞減：雨水、純水、海水，說明水溶液對摩擦因數(shù)的影響，尤其是海水顯著的減摩作用；低頻時，純水中的磨損體積最大；隨著頻率上升，由于Cl−對基體的腐蝕效應(yīng)以及對磨損的促進作用，導致LY12微弧氧化膜在海水和雨水中的磨損量快速上升而超過純水中的磨損量，使得腐蝕磨損呈正的交互作用。
關(guān)鍵字: 鋁合金；微弧氧化；腐蝕磨損；摩擦因數(shù)
（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
