Abstract
Bisphenol A/diaminodiphenylmethane (BA-ddm)-based polybenzoxazine precursor was synthesized from 4,4′-diaminodiphenylmethane, bisphenol A, and paraformaldehyde. The curing behavior of BA-ddm was studied by using differential scanning calorimeter and Fourier transform infrared spectrometer techniques. To verify the anticorrosion property, cured polybenzoxazine (PBA-ddm) coatings were prepared on mild steel (MS) through dip-coating and thermal curing methods. The surface properties of cured PBA-ddm coatings were characterized by microscopy and contact angle measurement. The electrochemical measurements were carried out to investigate the corrosion properties of PBA-ddm-coated MS. The results showed that PBA-ddm-coated MS samples exhibited high anticorrosive performance with the corrosion current reduced by two orders of magnitude than that of pristine MS.
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Acknowledgments
This work was financially supported by National Natural Science Foundation of China (21506062), Fundamental Research Funds for the Central Universities (22A201514015), China Postdoctoral Science Foundation (2015M571509), and Shanghai Key Laboratory of Multiphase Materials Chemical Engineering (MMCE2015004).
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Lu, X., Liu, Y., Zhang, W. et al. Crosslinked main-chain-type polybenzoxazine coatings for corrosion protection of mild steel. J Coat Technol Res 14, 937–944 (2017). https://doi.org/10.1007/s11998-016-9902-5
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DOI: https://doi.org/10.1007/s11998-016-9902-5