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

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Journal of Wuhan University of Technology(Materials Science) 2022年第6期37卷 1066-1072页

作者： LU Weixing WU Linling MA Chunyu YUAN Jing ZHANG Qianfeng Institute of Molecular Engineering and Applied Chemistry Anhui University of TechnologyMa’anshan 243002China Department of Civil Engineering Tongling UniversityTongling 244000China

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 *** UV-curing,the passivation film was characterized by neutral salt spray test,electrochemical testing and other *** general performance of the passivation film may meet the requirements of downstream users of hot aluminum-zinc steel *** neutral salt spray test,electrochemical testing and microscopic surface morphology analysis of passivation film are in *** introduction of titanate components may effectively promote the photocuring of free *** have been few reports on the titanate coupling which is added to UV-curing coating *** 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

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UV-LED Curing cationic Passivation Film for the Surface of Hot-Dip Aluminum-Zinc Coated Steel Plate

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Journal of Materials Science and Chemical Engineering 2022年第9期10卷 27-48页

作者： Weixing Lu Linling Wu Chunyu Ma Qian-Feng Zhang Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma’anshan China

The surface treatment technology of hot aluminum-zinc steel plate and UV curing technology may be effectively combined in the present research. According to different light curing mechanisms, different formulations from UV curing surface treatment agents can be applied to the surface treatment of hot aluminum-zinc steel plate, mainly including 3-ethyl-3-benzoxy-methyl oxacyclobutane (TCM 104) and 3,4-epoxy-cyclohexylformic acid -3',4'-epoxy-cyclohexyl methyl ester (UVR 6110) as active diluents, high molecular weight polyfunctional oxacyclobutane as oligomer, triaryl sulfonium salt as a cationic photoinitiator, and an anthracene compound as a sensitizer. 385 nm LED lamp used as a radiation resource, the effects of the proportion of active diluent, the type and amount of photoinitiator, the amount of sensitizer, the curing temperature, and the amount of nano-SiO2 on the photocuring rate were investigated by photoper-scanning differential calorimetry (Photo-DSC). The experimental results show that the system has the fastest photocuring rate under the conditions of 8:2 ratio of TCM 104 to UVR 6110, 2.5% photoinitiator, 0.6% sensitizer, 0.2% nano-SiO2 additive, and 80˚C curing temperature. Based on addition of the appropriate number of various additives, the cationic photocuring surface treatment solution was prepared and further coated on the hot-dip galvalume steel plates. After curing, the passivation films were characterized by neutral salt spray test (NSST), Fourier transform infrared spectroscopy (FT-IR), electrochemical testing and other methods. The results show that the formulations could be cured at an energy of 150 mJ/cm2, and the overall performance of the passivation film could meet with the requirements of the downstream users.

关键词： cationic photocuring Hot-Dip Galvalume Steel Plate Surface Treatment Corrosion Resistance Chromium Free Environmental Passivation Film

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