(中南工業(yè)大學(xué)材料科學(xué)與工程系，長(zhǎng)沙410083)
摘 要: 針對(duì)空調(diào)機(jī)使用過程中出現(xiàn)的白粉與水橋問題，對(duì)其鋁翅片進(jìn)行了處理。經(jīng)鉻酸鹽氧化處理，耐蝕性能提高，其上再涂覆環(huán)氧樹脂膜后，耐蝕性更有顯著提高，可減少白粉問題，所配制的親水膜使鋁箔與水的接觸角從未處理前大于90°降至30～40°， 能消除水橋的影響。成膜劑中親水官能團(tuán)與水的羥基形成氫鍵結(jié)合是有機(jī)、無機(jī)及有機(jī)-無機(jī)復(fù)合3種不同系列親水膜親水的實(shí)質(zhì)。為提高涂膜親水性 ，添加表面活性劑十二烷基磺酸鈉的量有一最佳值，約為成膜劑的7.5%(體積百分比)。
關(guān)鍵字: 空調(diào)器 鋁 翅片材 親水 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
