Preparation and Anti-Corrosion Properties of Polyaniline-Boron Nitride Nanoparticle Composite Waterborne Epoxy Coating

AN Ran, HAN Fei, LAN Ke, LI Zhu, GUO Xiaoping, LIU Shuan

doi:10.16577/j.issn.1001-1560.2024.0029

Materials Protection >

2024 , Vol. 57 >Issue 2: 18 - 27

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0029

Preparation and Anti-Corrosion Properties of Polyaniline-Boron Nitride Nanoparticle Composite Waterborne Epoxy Coating

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(1.School of Chemistry and Chemical Engineering， Jiangxi University of Science and Technology， Ganzhou 341000， China；2.Ningbo Institute of Materials Technologies and Engineering， Chinese Academy of Sciences， Ningbo 315201， China；3.Hangzhou Benchuang Technology Co.， Ltd.， Hangzhou 310030， China)

LIU Shuan (1986-)， Ph.D.， Senior Engineer， Research Focus: Marine Heavy Anticorrosive Coatings， E-mail:liushuan＠nimte.ac.cn

Received date: 2023-06-05

Revised date: 2023-08-14

Accepted date: 2023-09-10

Online published: 2024-03-08

Supported by

Science and Technology Project of Hangzhou Benchuang Technology Co.， Ltd.； National Key R＆D Program “Development and Application Demonstration of Deepsea Underwater Electro-Hydraulic Actuator (EHA)”(Item number:2023YFC2809901)

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Abstract

For improving the anti-corrosion performance and durability of waterborne epoxy coatings in high-salt， high-humidity marine environments， polyaniline/boron nitride nanoparticles (PBN) were prepared by the in-situ polymerization of polyaniline (PANI) on the surface of hydroxylated hexagonal boron nitride (BN).In addition， PBN were used as anti-corrosion filler to enhance the anti-corrosion performance of waterborne epoxy coatings.The structure and micro-morphology of nano-particles were characterized by Fourier transform infrared spectroscopy(FT-IR) and scanning electron microscopy (SEM).Moreover， electrochemical tests and neutral salt spray tests (NSS) were used to explore the effects of BN， PANI modifications and PBN addition amount on the anti-corrosion performance of waterborne epoxy coatings.Results showed that PANI grew in situ on the surface of BN nanosheets to form a coral-like structure， and the bonding strength of waterborne epoxy coating reached 6.05 MPa after adding 0.50%(mass fraction，the same below) PBN.The corrosion current density (1.99×10-9 A/cm2) of the composite coating immersed in 3.5%NaCl solution after 120 h was reduced by about 3 orders of magnitude compared to that of pure epoxy coating (1.01×10-6 A/cm2).This was attributed to the fact that the addition of 0.50%PBN could evenly disperse in the epoxy resin， fill small gaps in the coating and enhance the barrier effect against corrosive medium.Meanwhile， PANI had a corrosion inhibition effect， which could synergistically improve the anti-corrosion performance of pure epoxy coatings.

Key words： polyaniline; boron nitride; modification; waterborne epoxy coating; anti-corrosion performance

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AN Ran, HAN Fei, LAN Ke, LI Zhu, GUO Xiaoping, LIU Shuan . Preparation and Anti-Corrosion Properties of Polyaniline-Boron Nitride Nanoparticle Composite Waterborne Epoxy Coating[J]. Materials Protection, 2024 , 57(2) : 18 -27 . DOI: 10.16577/j.issn.1001-1560.2024.0029

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