铝型材刻蚀量对无铬氧化后粉末喷涂结合力的影响  

Effect of etching amount on adhesion of powder coating sprayed on chromium-free oxidized aluminum profile

作　　者：兰林[1] 刘晓辉[1] 欧阳贵[1,2] 占稳 田丰[1] LAN Lin;LIU Xiao-hui;OUYANG Gui;ZHAN Wen;TIAN Feng(Wuhan Research Institute of Materials Protection,Wuhan 430030,China)

机构地区：[1]武汉材料保护研究所,湖北武汉430030 [2]特种表面保护材料及应用技术国家重点实验室,湖北武汉430030

出　　处：《电镀与涂饰》2018年第21期1009-1011,共3页Electroplating & Finishing

基　　金：湖北省自然科学基金(2017CFB580);国土资源部稀土稀有稀散矿产重点实验室开放基金(KLRM-KF201804)

摘　　要：对铝型材依次进行除油、酸性刻蚀、无铬氧化和静电粉末喷涂而得到粉末涂层,研究了铝刻蚀量对粉末涂层结合力的影响。当刻蚀量小于5 mg/dm^2时,粉末涂层有严重的掉粉现象。当刻蚀量达到10 mg/dm^2及以上时,粉末涂层经冲击试验后无掉粉,沸水附着力达到0级。刻蚀量与温度和槽液性能有关,实际生产中应根据季节和槽液刻蚀速率调整刻蚀时间。Powder coating was electrostatically sprayed on the aluminum profile treated by degreasing,acid etching,and chromium-free oxidation successively.The effect of aluminum etching amount on the adhesion of powder coating was studied.There is a serious dusting phenomenon on powder coating when the etching amount is 5 mg/dm2 below.The powder coating sprayed on the aluminum profile etched with a mass reduction of 10 mg/dm2 or higher features no dusting after impact test and a 0-grade adhesion in cross-cut tape test after boiling.The etching amount is related to the temperature and performance of the etching solution.The etching time should be adjusted according to the season and the etching rate.

关 键 词：铝型材 刻蚀 无铬氧化 静电粉末喷涂 附着力 

分 类 号：TQ153.6[化学工程—电化学工业]