Reparation and Performance Testing of Free Radical Photocurable Passivation Film Modified by Titanate Coupling Agent for Hot-plated Aluminum-zinc Steel Plate  

作　　者：LU Weixing WU Linling MA Chunyu YUAN Jing ZHANG Qianfeng 陆伟星;WU Linling;MA Chunyu;YUAN Jing;张千峰(Institute of Molecular Engineering and Applied Chemistry,Anhui University of Technology,Ma’anshan 243002,China;Department of Civil Engineering,Tongling University,Tongling 244000,China)

机构地区：[1]Institute of Molecular Engineering and Applied Chemistry,Anhui University of Technology,Ma’anshan 243002,China [2]Department of Civil Engineering,Tongling University,Tongling 244000,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2022年第6期1066-1072,共7页武汉理工大学学报（材料科学英文版）

基　　金：by the National Basic Research Program of China(2009AA03Z529)。

摘　　要：To study the effect of free radical photocurable passivation film modified by titanate coupling agent for hot-plated aluminum-zinc plate,trimethylpropane triacrylate(TMPTA)and 2-phenoxyethyl acrylate were used as active diluents,a mixture of modified epoxy acrylate and modified polyester acrylate in a certain proportion was used as an oligomer,2-methyl-1-[4-(methylothyl)benzene]-2-morpholine acetone(907)was used as a free radical photoinitiator,isopropyl thioxanthone(ITX)was used as sensitizer,and bis(dioctyl phosphate acyl)titanate ethyltitanate acrylamide chelate(FD-812)was used as corrosion inhibitor modifier.After UV-curing,the passivation film was characterized by neutral salt spray test,electrochemical testing and other methods.The general performance of the passivation film may meet the requirements of downstream users of hot aluminum-zinc steel plate.The neutral salt spray test,electrochemical testing and microscopic surface morphology analysis of passivation film are in agreement.The introduction of titanate components may effectively promote the photocuring of free radicals.There have been few reports on the titanate coupling which is added to UV-curing coating formula.The titanate coupling agent contains acrylamide groups and terminal amine groups,acrylamide group has oligomer and crosslinking monomer,the terminal tertiary amine groups can provide hydrogen protons,reduce oxygen polymerization,and a phosphating film is formed on the surface of the metal substrate to improve the adhesion and corrosion resistance of the coating.

关 键 词：cationic photocuring hot galvalume steel plate surface treatment titanate coupling agent chromium-free environmental passivation film 

分 类 号：TG174.4[金属学及工艺—金属表面处理]