Free Radical-Cationic Hybrid System Passivation Film for the Surface of Hot-Dip Aluminum-Zinc Coated Steel Plate

Wei Xing Lu; Lin Ling Wu; Chun Yu Ma; Qian Feng Zhang

doi:10.4028/p-d18ir5

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 915Free Radical-Cationic Hybrid System Passivation...

Free Radical-Cationic Hybrid System Passivation Film for the Surface of Hot-Dip Aluminum-Zinc Coated Steel Plate

Abstract:

3-Ethyl-3-benzoxy-methyl oxacyclobutane (TCM 104) and 3,4-epoxy-cyclohexyl carboxylic acid-3',4'-epoxy-cyclohexyl methyl ester (UVR 6110) as active diluents, a mixture of modified epoxy-acrylate and modified polyester acrylate in a certain proportion of oligomer, triaryl sulfonium hexafluorophosphate as cationic photoinitiator, irgacure 184 as free radical photoinitiator, and high-pressure mercury lamp as radiation source, and then the compound formula of free radical and cation hybrid photo-curing were prepared and further coated on the hot-dipped aluminum-zinc steel plate. After curing, the passivation film was characterized by neutral salt spray testing, FT-IR spectroscopy and electrochemical properties along with other relative evaluation criterions. The passivation film of this hybrid system can be cured at an energy of 600 mJ/cm², and its performances are comparable to those of current water-based passivators.

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Periodical:

Key Engineering Materials (Volume 915)

Pages:

43-52

DOI:

https://doi.org/10.4028/p-d18ir5

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Online since:

March 2022

Authors:

Wei Xing Lu, Lin Ling Wu, Chun Yu Ma, Qian Feng Zhang*

Keywords:

Chrome-Free Environmental Passivation Film, Corrosion Resistance, Free Radical-Cationic Hybrid UV-Photocuring, Hot Aluminum-Zinc Steel Plate, Surface Treatment

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