Improvement of the Anticorrosion Properties of a Working Emulsion of Mine Hydraulic Systems

• Published in: Materials science (New York, N.Y.) N.Y.), 2018-01, Vol.53 (4), p.569-575
• Main Authors: Pokhmurs’kyi, V. I., Zin’, I. M., Student, M. M., Tymus, M. B., Veselivs’ka, H. H., Stupnyts’kyi, T. R.
• Format: Article
• Language: English
• Subjects: Adsorption; Analysis; Arc spraying; Carbon steel; Cathodic protection; Characterization and Evaluation of Materials; Chemistry and Materials Science; Chloride ions; Coatings; Corrosion; Corrosion inhibitors; Corrosion prevention; Cylinders; Deceleration; Electric wire; Hydraulic equipment; Hydroxyl ions; Industrial equipment; Materials Science; Molecular chains; Protective coatings; Sodium benzoate; Sodium chloride; Sodium silicate; Sodium silicates; Solid Mechanics; Sprayed coatings; Steel corrosion; Structural Materials
• ISSN: 1068-820X; 1573-885X
• DOI: 10.1007/s11003-018-0110-6

We seek new efficient corrosion inhibitors for the protection of steel rods of mine hydraulic cylinders with electric-arc sprayed coatings against corrosion in the FMI-RZh working emulsion contaminated with chloride ions. A significant deceleration of the corrosion fracture of 45 steel is detected after the addition of sodium silicate and benzyl benzoate to the emulsion. The inhibiting effect of benzyl benzoate can be explained by the adsorption of its polar molecules on the steel surface and by the formation of sodium benzoate as a result of the reaction with hydroxyl ions near the cathodic sections. Both inhibitors provide the efficient corrosion protection of the “45 carbon steel–electric-arc sprayed powder-wire coating” system in a 3% solution of sodium chloride under the conditions of leakage of the inhibited emulsion through the porous sprayed layer.