Application of g-C3N4/sol—gel nanocomposite on AM60B magnesium alloy and investigation of its properties

• Published in: International journal of minerals, metallurgy and materials Vol. 30; no. 6; pp. 1113 - 1127
• Main Authors: Samadianfard, Roghaye, Seifzadeh, Davod, Dikici, Burak
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01-06-2023; Springer Nature B.V; Corrosion and Industrial Electrochemistry Research Laboratory,University of Mohaghegh Ardabili,Ardabil P.O.Box 179,Iran%Ataturk University,Department of Metallurgical and Materials Engineering,Erzurum 25240,Turkey
• Subjects: Acid rain; Carbon nitride; Ceramics; Characterization and Evaluation of Materials; Chemical bonds; Chemical composition; Chemistry and Materials Science; Composites; Corrosion and Coatings; Corrosion prevention; Corrosion resistance; Corrosion tests; Electrochemical impedance spectroscopy; Electrochemistry; Glass; Graphene; Hydroxylation; Investigations; Magnesium; Magnesium alloys; Magnesium base alloys; Materials Science; Metallic Materials; Microscopy; Nanocomposites; Natural Materials; Photoelectrons; Sol-gel processes; Spectroscopy; Spectrum analysis; Surfaces and Interfaces; Thermal stability; Thin Films; Tribology; X ray photoelectron spectroscopy; electrochemical impedance spectroscopy; Mg alloy; sol—gel; corrosion protection; nanocomposite; g-C; N; g-C3N4 nanocomposite; sol–gel
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-022-2581-6

To protect the AM60B magnesium alloy from corrosion, a sol—gel coating containing hydroxylated g-C
3
N
4
nanoplates was applied. The chemical composition of the hydroxylated g-C
3
N
4
nanoplates was investigated using X-ray photoelectron spectroscopy (XPS). The hydroxylation process did not affect the crystal size, specific surface area, pore volume, average pore diameter, and thermal stability of the g-C
3
N
4
nanoplates. After incorporating pristine and hydroxylated g-C
3
N
4
nanoplates, dense sol-gel coatings were obtained. Transmission electron microscopy (TEM) revealed the uniform distribution of the modified g-C
3
N
4
in the coating. The average roughness of the coating was also reduced after adding the modified nanoplates due to the decreased aggregation tendency. Electrochemical impedance spectroscopy (EIS) examinations in simulated acid rain revealed a significant improvement in the anticorrosion properties of the sol—gel film after the addition of the modified g-C
3
N
4
due to the chemical bonding of the coating to the nanoplates.