In:
Frontiers in Materials, Frontiers Media SA, Vol. 9 ( 2022-11-17)
Abstract:
In this study, the electrochemical performance of microcapsules (MCs) containing NaNO 2 corrosion inhibitors for steel reinforcements was studied in 0.6 M chloride contaminated simulated concrete pore solutions (SCPS) with varying pH for a period of 28 days. The corrosion inhibition was studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The polarization results for the MC samples showed improved corrosion resistance, with an i corr of 2.54 ×10 –6 A/cm 2 after 28 days exposure in SCPS. Oxygen scavenging activity from the MCs was observed by reduced cathodic kinetics, displaying decreased cathodic exchange current densities of 2.66 ×10 −8 A/cm 2 , thus imparting cathodic inhibition in conjunction with anodic corrosion inhibitors. The microcapsules additionally displayed improvement over free NaNO 2 inhibitors after sufficient release time. The decrease in cathodic and anodic kinetics, along with the improved corrosion resistance, show a dual synergistic corrosion inhibition of the NaNO 2 loaded colophony MC.
Type of Medium:
Online Resource
ISSN:
2296-8016
DOI:
10.3389/fmats.2022.1052261
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2022
detail.hit.zdb_id:
2759394-0
