(中南工业大学材料科学与工程系，长沙410083)
摘 要: 针对空调机使用过程中出现的白粉与水桥问题，对其铝翅片进行了处理。经铬酸盐氧化处理，耐蚀性能提高，其上再涂覆环氧树脂膜后，耐蚀性更有显著提高，可减少白粉问题，所配制的亲水膜使铝箔与水的接触角从未处理前大于90°降至30～40°， 能消除水桥的影响。成膜剂中亲水官能团与水的羟基形成氢键结合是有机、无机及有机-无机复合3种不同系列亲水膜亲水的实质。为提高涂膜亲水性 ，添加表面活性剂十二烷基磺酸钠的量有一最佳值，约为成膜剂的7.5%(体积百分比)。
关键字: 空调器 铝 翅片材 亲水 涂膜
（Department of Materials Science and Engineering,Central South University of Technology, Changsha 410083）
Abstract:Aimed at the white powder and water bridge problems raised in the working process of air conditioners, the surfaces of the aluminium fins were treated with different coatings. The corrosion resistance of the fin stocks was enhanced after the chromate oxidation treatment and the subsequent coating of epoxy resin film, thus the corrosion resultant, white powder, was diminished. The hydrophilic coatings used can eliminate the effect of the water bridge, by reducing the contact angle between water and the surface of aluminium fins from more than 90° before coating to 30～40° after coating. The common essence of hydrophilicity of the tested coatings is the hydrogen bond formed between the hydrophilic groups of the former film and the hydroxyl groups of water. The optimal concentration of sodium dodecanesulphonate, which acts as the surface active agent, added to the coatings to improve the hydrophilicity is 7.5%(in volume).
Key words: air conditioner aluminium fin material coating
