Oat extract as a natural alkaline scale inhibitor for carbon steel in seawater: electrochemical (AC and DC) studies

The controlling of alkaline scale deposition on carbon steel surface in seawater by Oat extract was probed by means of current/time transients, electrochemical impedance spectroscopy (EIS) tests and scanning electron mi-croscopy (SEM), high-performance liquid chromatography (HPLC), Fourier-transform infrared (FT-IR), X-ray diffraction (XRD) examinations. Nucleation, scale formation and coverage of carbon steel with alkaline scales were detected by current/time curves. The results demonstrate that the retardation in alkaline scale formation is controlled by Oat extract, with 86% efficiency at the highest con-centration. The scale growth inhibition is due to the adsorption of Oat extract components on the active growth sites of crystal surfaces.

Automated summary

Research findings show that Oat extract can effectively delay the deposition of alkaline scale on the surface of carbon steel in seawater, with a mechanism of inhibiting scale growth by adsorbing on active growth sites of crystal surfaces. The highest efficiency of 86% is achieved at the highest concentration of Oat extract.