Modified graphene oxide/waterborne epoxy composite coating with enhanced corrosion resistance

Lisheng Zhou; Pengbo Zhang; Liming Shen; Liangyong Chu; Jian Wu; Yujie Ding; Beijie Zhong; Xiaoyan Zhang; Ningzhong Bao

doi:10.1016/j.porgcoat.2022.107100

Modified graphene oxide/waterborne epoxy composite coating with enhanced corrosion resistance

Lisheng Zhou, Pengbo Zhang, Liming Shen, Liangyong Chu, Jian Wu, Yujie Ding, Beijie Zhong, Xiaoyan Zhang, Ningzhong Bao

College of Chemical Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Waterborne epoxy (WEP) resin is drawing increasing attention due to its environmentally friendly nature. However, its application has been greatly hindered by poor corrosion resistance due to its rich inherent defects. In this work, maleic acid diamine (C₄H₆N₂O₂, MAD) modified graphene oxide (M-GO) was designed as the filler, and GO/WEP composite coatings with a high cross-linking degree, improved hydrophobicity, and high barrier properties were prepared. M-GO had a good water dispersibility and high affinity to the resin. The chemical grafting between the amino group of MAD and WEP can improve the degree of chemical cross-linking inside the coating to form a compact structure. Electrochemical impedance spectroscopy (EIS) measurements and salt spray test results indicate that the M-GO/WEP composite coating with 0.3 wt% M-GO has the best anti-corrosion performance. After being immersed in 3.5 wt% NaCl solution for 96 h, the |Z|_0.01Hz value of M-GO/WEP composite coating is 1.03 × 10⁸ Ω•cm², corrosion current density is 0.00040 ɥA/cm² and the protection efficiency reaches 99.99 %.

Original language	English
Article number	107100
Journal	Progress in Organic Coatings
Volume	172
DOIs	https://doi.org/10.1016/j.porgcoat.2022.107100
State	Published - Nov 2022

Keywords

Chemical grafting
Corrosion resistance
Modified-GO
Waterborne coating

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10.1016/j.porgcoat.2022.107100

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title = "Modified graphene oxide/waterborne epoxy composite coating with enhanced corrosion resistance",

abstract = "Waterborne epoxy (WEP) resin is drawing increasing attention due to its environmentally friendly nature. However, its application has been greatly hindered by poor corrosion resistance due to its rich inherent defects. In this work, maleic acid diamine (C4H6N2O2, MAD) modified graphene oxide (M-GO) was designed as the filler, and GO/WEP composite coatings with a high cross-linking degree, improved hydrophobicity, and high barrier properties were prepared. M-GO had a good water dispersibility and high affinity to the resin. The chemical grafting between the amino group of MAD and WEP can improve the degree of chemical cross-linking inside the coating to form a compact structure. Electrochemical impedance spectroscopy (EIS) measurements and salt spray test results indicate that the M-GO/WEP composite coating with 0.3 wt% M-GO has the best anti-corrosion performance. After being immersed in 3.5 wt% NaCl solution for 96 h, the |Z|0.01Hz value of M-GO/WEP composite coating is 1.03 × 108 Ω•cm2, corrosion current density is 0.00040 ɥA/cm2 and the protection efficiency reaches 99.99 %.",

keywords = "Chemical grafting, Corrosion resistance, Modified-GO, Waterborne coating",

author = "Lisheng Zhou and Pengbo Zhang and Liming Shen and Liangyong Chu and Jian Wu and Yujie Ding and Beijie Zhong and Xiaoyan Zhang and Ningzhong Bao",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2022",

month = nov,

doi = "10.1016/j.porgcoat.2022.107100",

language = "英语",

volume = "172",

journal = "Progress in Organic Coatings",

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TY - JOUR

T1 - Modified graphene oxide/waterborne epoxy composite coating with enhanced corrosion resistance

AU - Zhou, Lisheng

AU - Zhang, Pengbo

AU - Shen, Liming

AU - Chu, Liangyong

AU - Wu, Jian

AU - Ding, Yujie

AU - Zhong, Beijie

AU - Zhang, Xiaoyan

AU - Bao, Ningzhong

PY - 2022/11

Y1 - 2022/11

N2 - Waterborne epoxy (WEP) resin is drawing increasing attention due to its environmentally friendly nature. However, its application has been greatly hindered by poor corrosion resistance due to its rich inherent defects. In this work, maleic acid diamine (C4H6N2O2, MAD) modified graphene oxide (M-GO) was designed as the filler, and GO/WEP composite coatings with a high cross-linking degree, improved hydrophobicity, and high barrier properties were prepared. M-GO had a good water dispersibility and high affinity to the resin. The chemical grafting between the amino group of MAD and WEP can improve the degree of chemical cross-linking inside the coating to form a compact structure. Electrochemical impedance spectroscopy (EIS) measurements and salt spray test results indicate that the M-GO/WEP composite coating with 0.3 wt% M-GO has the best anti-corrosion performance. After being immersed in 3.5 wt% NaCl solution for 96 h, the |Z|0.01Hz value of M-GO/WEP composite coating is 1.03 × 108 Ω•cm2, corrosion current density is 0.00040 ɥA/cm2 and the protection efficiency reaches 99.99 %.

AB - Waterborne epoxy (WEP) resin is drawing increasing attention due to its environmentally friendly nature. However, its application has been greatly hindered by poor corrosion resistance due to its rich inherent defects. In this work, maleic acid diamine (C4H6N2O2, MAD) modified graphene oxide (M-GO) was designed as the filler, and GO/WEP composite coatings with a high cross-linking degree, improved hydrophobicity, and high barrier properties were prepared. M-GO had a good water dispersibility and high affinity to the resin. The chemical grafting between the amino group of MAD and WEP can improve the degree of chemical cross-linking inside the coating to form a compact structure. Electrochemical impedance spectroscopy (EIS) measurements and salt spray test results indicate that the M-GO/WEP composite coating with 0.3 wt% M-GO has the best anti-corrosion performance. After being immersed in 3.5 wt% NaCl solution for 96 h, the |Z|0.01Hz value of M-GO/WEP composite coating is 1.03 × 108 Ω•cm2, corrosion current density is 0.00040 ɥA/cm2 and the protection efficiency reaches 99.99 %.

KW - Chemical grafting

KW - Corrosion resistance

KW - Modified-GO

KW - Waterborne coating

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U2 - 10.1016/j.porgcoat.2022.107100

DO - 10.1016/j.porgcoat.2022.107100

M3 - 文章

AN - SCOPUS:85135927515

SN - 0300-9440

VL - 172

JO - Progress in Organic Coatings

JF - Progress in Organic Coatings

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ER -

Modified graphene oxide/waterborne epoxy composite coating with enhanced corrosion resistance

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Keywords

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