Electrochemical Properties of Anticorrosion Coatings Based on an Organosilicate Composition in Combination with Corrosion Inhibitors

• Published in: Inorganic materials : applied research 2023-04, Vol.14 (2), p.496-501
• Main Authors: Ivanova, A. G., Krasilnikova, L. N., Lezova, O. S., Zagrebelny, O. A., Khodzhaev, R. S., Khamova, T. V., Trusov, V. I., Shilova, O. A.
• Format: Article
• Language: English
• Subjects: Atmospheric corrosion; Carbon steels; Chemistry; Chemistry and Materials Science; Composition; Corrosion currents; Corrosion inhibitors; Corrosion potential; Corrosion prevention; Corrosion resistance; Corrosion tests; Electrochemical analysis; Electrode polarization; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Materials Science; New Technologies for Obtaining and Processing Materials; Phosphating (coating); Primers (coatings); Protective coatings; Steel plates
• ISSN: 2075-1133; 2075-115X
• DOI: 10.1134/S207511332302020X

The influence of atmospheric corrosion inhibitors NOTECh, N-M-1, and FMT and phosphating primer VL-02 on the electrochemical properties of anticorrosion coatings based on a new modification of OS-51-03M organosilicate composition is considered. For corrosion tests using the method of potentiodynamic polarization, plates made of carbon steel grade St3sp5 were used, on which coatings were applied by the paint and varnish method. It was found that the NOTECh aqueous phosphating composition and the N‑M-1 corrosion inhibitor significantly increase the corrosion resistance of organosilicate coatings in an aggressive environment—3% NaCl solution. For these coatings, it is impossible to register the current and corrosion potential after 1 month of exposure of the coatings in a corrosive environment. Under similar measurement conditions, the electrochemical parameters of steel plates with an unmodified organosilicate coating were determined: the corrosion current density is 8 × 10 –9 A/m 2 ; the corrosion potential is –144 mV. It was found that the VL-02 phosphating primer has little effect on increasing the duration of anticorrosive protection of the organosilicate coating system. The type of inhibitory protection of atmospheric corrosion inhibitors is determined.