热交换器翅片用亲水铝箔预处理工艺控制

亲水铝箔用作热交换器时，在加工及使用过程中对其附着力、耐腐蚀性及亲水性等涂层性能要求较高，为确保亲水铝箔涂层性能，涂覆前的清洗预处理尤为重要。通过中性盐雾试验、附着力测试及持续亲水性测试等手段，分析了亲水铝箔预处理工艺参数的制定及优化控制，涂覆前预处理按照脱脂液浓度2%～5%（质量分数），脱脂液温度20～40℃，pH 10～13，热水清洗温度40～60℃，处理后铝箔板面清洁度达因值≥56即可满足亲水铝箔的生产需求。

Control of Pretreatment Process of Hydrophilic Foil for Heat Exchanger Fin

Hydrophilic aluminum foil used as heat exchanger in the course of processing and using,the requirement of its adhesion,corrosion resistance and hydrophilic coating performance is higher.The pretreatment before coating is very important in order to ensure the coating properties of hydrophilic aluminium foil.In this paper,neutral salt spray test,adhesion test and continuous hydrophilic test were introduced.The formulation and optimization control of pretreatment parameters of hydrophilic aluminium foil were presented as well.The concentration of the degreasing solution before coating is 2%-5%(mass fraction),the degreasing solution temperature is 20-40 degrees Celsius,the pH is controlled within the range of 10-13,and the hot water cleaning temperature is 40-60 degrees Celsius.And after treatment,the surface cleanliness of aluminum foil is more than 56 to meet the demand of hydrophilic aluminum foil production.