Investigation of copper/carbon nanocomposites modified with phosphorus-containing groups as inhibiting additives in mineral oil

• I.N. Shabanova¹, S.M. Reshetnikov^1,2, V.I. Kodolov³, N.S. Terebova¹, R.V. Mustakimov³, F.F. Chausov¹ and S.G. Bystrov¹

¹ Udmurt Federal Research Center, UB RAS, T. Baramzina str. 34, 426067 Izhevsk, Russian Federation
² Udmurt State University, Universitetskaya str. 1, 426034 Izhevsk, Russian Federation
³ M.T. Kalashnikov State Technical University, Studencheskaya str. 7, 426069 Izhevsk, Russian Federation

Abstract: The mechanism responsible for a protective anticorrosive preservative layer composed of mineral oil with various amounts of a phosphorus-containing copper/carbon nanocomposite was studied by the XPS method from room temperature to 700℃. It was shown that a durable corrosion-protective layer was formed due to the donor–acceptor bonds between iron and phosphorous atoms. No changes in the nature of the contact between the protective layer and the steel substrate were found upon heating in a spectrometer chamber (in vacuo) with simultaneous acquisition of X-ray electron spectra. Optical microscopy surface analysis revealed that, at room temperature, the nanocomposites in mineral oil formed separate conglomerates on the steel surface. The conglomerates disintegrated into individual nanoparticles at temperatures of 100–200℃, and nanoparticles distributed over the entire surface. The interactions between the nanocomposite and iron led to the formation of a durable protective coating that hindered the attack of corrosive surface environments. The corrosion protection of alloy-free steel was studied by a Monicor corrosion meter. A sulfate–chloride solution simulating moisture condensate during atmospheric corrosion was used as the corrosive medium. The study provided evidence that the incorporation of copper/carbon nanocomposites modified with phosphorus-containing groups could suppress atmospheric corrosion by 70–95%.

Keywords: X-ray electron spectroscopy, optical microscopy, corrosion meter, anticorrosive layer, copper/carbon nanocomposite modified with phosphorus-containing groups

Int. J. Corros. Scale Inhib., 2020, 9, no. 4, 1381-1389 PDF (437 K)
doi: 10.17675/2305-6894-2020-9-4-11

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