A Novel Epoxy Resin Composite Coating Containing Polyaniline Modified Go with Triple Anti-Corrosion Effects of Barrier, Passivation and Corrosion

28 Pages Posted: 10 Mar 2024

See all articles by Xu Ding

Xu Ding

Harbin Engineering University

Qingwu Wang

Harbin Engineering University

Xin Xu

Harbin Engineering University

Xiaojuan Nie

Harbin Engineering University

Xiaodong Xu

Harbin Engineering University

Junqing Li

Harbin Engineering University

Abstract

Corrosion of metallic materials can have a detrimental impact on their performance, leading to a shortened service life of engineering equipment and posing risks to both people and the environment. This paper presents a novel epoxy resin (EP)-based coating composite (PFANI-GO/EP) that offers triple corrosion protection functions: barrier, passivation, and corrosion inhibition. The composite is prepared by blending superhydrophobic perfluorooctanoic acid-doped polyaniline modified graphene oxide (PFANI-GO) into an epoxy resin matrix. PFANI-GO demonstrates exceptional superhydrophobicity, effectively enhancing the coating's barrier ability against corrosive substances. Moreover, PANI and PFOA aid in developing a passivation film and a hydrophobic layer for corrosion inhibition on the metal, respectively, enhancing the coating's passivation and anti-corrosion capabilities greatly. Electrochemical impedance spectroscopy was employed to measure the impedance modulus of different coatings for Q235 steel. The results indicate that the PFANI-GO/EP composite exhibits a water contact angle of 151.3°. After a 1-hour immersion in brine, the impedance modulus of the PFANI-GO/EP coating at a frequency of 0.01 Hz reaches 1x1011 Ω⋅cm2. Furthermore, after a 15-day immersion in brine, the PFANI-GO/EP coating demonstrates the highest impedance modulus at 0.01 Hz, surpassing 1x109 Ω⋅cm2, when compared to pure EP coating, GO/EP coating, and PFANI/EP coating. Therefore, due to its exceptional corrosion resistance and prolonged corrosion aging time, PFANI-GO/EP shows promising potential for mitigating metal corrosion.

Keywords: Polyaniline, Graphene oxide, Epoxy resin, Superhydrophobic, Anti-corrosion coating

Suggested Citation

Ding, Xu and Wang, Qingwu and Xu, Xin and Nie, Xiaojuan and Xu, Xiaodong and Li, Junqing, A Novel Epoxy Resin Composite Coating Containing Polyaniline Modified Go with Triple Anti-Corrosion Effects of Barrier, Passivation and Corrosion. Available at SSRN: https://ssrn.com/abstract=4754316 or http://dx.doi.org/10.2139/ssrn.4754316

Xu Ding

Harbin Engineering University ( email )

Harbin, 150001
China

Qingwu Wang

Harbin Engineering University ( email )

Harbin, 150001
China

Xin Xu

Harbin Engineering University ( email )

Harbin, 150001
China

Xiaojuan Nie

Harbin Engineering University ( email )

Harbin, 150001
China

Xiaodong Xu (Contact Author)

Harbin Engineering University ( email )

Harbin, 150001
China

Junqing Li

Harbin Engineering University ( email )

Harbin, 150001
China

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