Formation and characterization of organic silicon and fluoropolymers film on epoxy base for corrosion protection of carbon steel

Thuy Duong Nguyen; Thi Xuan Hang To; Ke Oanh Vu; Dai Lam Tran; Gia Vu Pham; Anh Son Nguyen; A. E. Salamianski; A. A. Rogachev; V. M. Akulova; G. B. Melnikova

doi:10.15625/2525-2518/20059

Author affiliations

Authors

Thuy Duong Nguyen Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Ha Noi, Viet Nam https://orcid.org/0000-0001-6843-5850
Thi Xuan Hang To Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Ha Noi, Viet Nam
Ke Oanh Vu Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Ha Noi, Viet Nam
Dai Lam Tran Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Ha Noi, Viet Nam https://orcid.org/0000-0003-1364-8001
Gia Vu Pham
Anh Son Nguyen Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Ha Noi, Viet Nam https://orcid.org/0000-0002-7221-3369
A. E. Salamianski Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, F. Skorini St., 36, 220141, Minsk, Belarus https://orcid.org/0000-0001-8355-8867
A. A. Rogachev Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, F. Skorini St., 36, 220141, Minsk, Belarus
V. M. Akulova Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, F. Skorini St., 36, 220141, Minsk, Belarus https://orcid.org/0000-0003-3883-2921
G. B. Melnikova A. V. Lykov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, P. Brovka St., 15, 220072, Minsk, Belarus

DOI:

https://doi.org/10.15625/2525-2518/20059

Keywords:

epoxy coatings , octadecyltrichlorosilane , heptadecafluoro tetrahydro decyltrimethoxysilane , polytetrafluoroethylene, polyvinylidene fluoride , hydrophobicity

Abstract

Coating systems using epoxy resin, organic silicon compounds (octadecyltrichlorosilane (OTS) and hydrolyzed heptadecafluoro tetrahydro decyltrimethoxysilane (HDFS)), and fluoropolymers (polytetrafluoroethylene (PTFE), and polyvinylidene fluoride (PVDF)), were applied to carbon steel. Epoxy (EP) coating and EP/OTS, EP/HDFS systems were produced via spin coating, while PTFE and PVDF layers were deposited using electron beam dispersion. Wettability, surface structure, and tribological properties were assessed through contact angle measurement, Fourier transform infrared reflection (FTIR), and tribotechnical test. Anticorrosion resistance was evaluated using electrochemical techniques, salt spray, and adhesion tests. Surface modifications with silicon compounds and fluoropolymers increased hydrophobicity, anticorrosion behavior and wear resistance. The water contact angles of EP, EP/OTS, EP/HDFS, EP/PVDF, and EP/PTFE were 84°, 108º, 116º, 96º, and 128º, respectively. Coating treatments reduced the friction coefficient. No corrosion was observed on treated surfaces after 336 hours in a salt spray chamber, while untreated EP showed rust after 96 hours. The hydrophobic systems based on epoxy resin, silicon compounds, and fluoropolymers are effective for protecting metal structures, with fluoropolymers providing higher protection to silicon compounds.

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