Research on Free Radical UV - Curable Passivation Film on the Surface of Hot - Dip Aluminum - Zinc Coated Steel Plate

LU Weixing, WU Linling, MA Chunyu, ZHANG Qianfeng

doi:10.16577/j.issn.1001-1560.2022.0283

Materials Protection >

2022 , Vol. 55 >Issue 10: 106 - 111

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0283

Research on Free Radical UV - Curable Passivation Film on the Surface of Hot - Dip Aluminum - Zinc Coated Steel Plate

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(1.Institute of Molecular Engineering and Applied Chemistry,Anhui University of Technology,Maanshan 243002,China;2.Technology Center of Shanghai Meishan Iron &Steel Co.,Ltd.,Nanjing 211100,China)

Received date: 2022-04-18

Revised date: 2022-05-10

Accepted date: 2022-05-31

Online published: 2023-12-23

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Abstract

This paper aims at preparing UV-curable coatings for hot-dip aluminum-zinc coated steel plates.Using trimethylolpropane triacrylate (TMPTA) and 2-phenoxyethyl acrylate as active diluents,the mixture of modified epoxy acrylate and modified polyester acrylate in a certain proportion as the oligomer,2-methyl-1-[4-(methylthio)benzene]-2-morpholinacetone (907) as the free radical photoinitiator,and isopropyl thioxanthone (ITX) as the sensitizer,the free radical light curing agent formula was compounded using high pressure mercury lamp as radiation source.The as-obtained light curing agent was coated on the surface of hot-dip aluminum-zinc coated steel plate.After curing treatment,the passivation film was characterized by neutral salt spray testing,electrochemical testing and other means.Results showed that the passivation films of this system could be cured at an energy of 600 mJ/cm2,and their general performance and resistance to neutral salt spray test (NSST) were able to meet the basic requirements of downstream users of hot-dip aluminum-zinc coated steel plate.

Key words： hot-dip aluminum-zinc coated steel plate; free radical light-curing; photoinitiator; sensitizer; passivation film; performance

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LU Weixing, WU Linling, MA Chunyu, ZHANG Qianfeng . Research on Free Radical UV - Curable Passivation Film on the Surface of Hot - Dip Aluminum - Zinc Coated Steel Plate[J]. Materials Protection, 2022 , 55(10) : 106 -111 . DOI: 10.16577/j.issn.1001-1560.2022.0283

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