The Formation of Self-Organizing Organosilicone Layers on a Carbon Steel Surface and Their Effect on the Electrochemical and Corrosion Behavior of the Metal

• Published in: Protection of metals and physical chemistry of surfaces 2019-09, Vol.55 (5), p.895-902
• Main Authors: Petrunin, M. A., Gladkikh, N. A., Maleeva, M. A., Maksaeva, L. B., Kostina, Yu. V., Shapagin, A. V., Yurasova, T. A., Kotenev, V. A., Tsivadze, A. Yu
• Format: Article
• Language: English
• Subjects: Accelerated tests; Adsorption; Anodic dissolution; Aqueous solutions; Carbon steel; Carbon steels; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Corrosion effects; Corrosion tests; Dissolution; Electrochemical analysis; Fourier transforms; Hydroxyl groups; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Iron; Materials Science; Metal surfaces; Metallic Materials; Nanoscale and Nanostructured Materials and Coatings; Silanes; Spectrum analysis; Surface chemistry; Surface layers; Test chambers; Tribology
• ISSN: 2070-2051; 2070-206X
• DOI: 10.1134/S2070205119050204

Adsorption on the carbon steel surface of vinyl trimethoxysilane and γ-aminopropyl triethoxysilane from aqueous solution is studied using the methods of Fourier-transform infrared spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy. A mechanism of surface layer formation is suggested. It is shown that in the course of adsorption silanes interact with hydroxyl groups of the metal surface with formation of Fe–O–Si bonds. The effect of organosilicone layers on the electrochemical behavior of steel is studied. It is found that the potential of pitting formation of steel is shifted in the presence of organosilicone layers into the range of positive values, which points to inhibition of local anodic dissolution of the metal. Accelerated corrosion tests of steel samples in a climatic chamber are performed, and the corrosion-inhibiting effect of vinyl- and amino-containing surface layers is shown.