Title: Twofold Mechanism of Organic Amino-Based Corrosion Inhibitor

Author(s): Suad Al-Bahar, Jayasree Chakkamalayath, Antony Joseph, Amer Al-Arbeed, and Dana Dashti

Publication: Materials Journal

Volume: 119

Issue: 1

Appears on pages(s): 15-28

Keywords: concrete resistivity; corrosion; durability; mechanical properties; salt diffusivity

DOI: 10.14359/51733145

Date: 1/1/2022

Abstract:
The improvement of durability and service life of reinforced concrete structures in the marine environment with the incorporation of corrosion inhibitors has attracted significant attention in recent years. The present study aims to evaluate the performance of a commercially available organic corrosion inhibitor in protecting the steel reinforcement of concrete structures in marine conditions. The study was performed on a control mixture and a test mixture with water-cement ratios (w/c) of 0.4 and 0.6, providing aggressive laboratory and field environments following the recommendation of international standards for corrosion inhibitors assessments. Corrosion monitoring methods and visual inspection of reinforcing bars confirmed the effectiveness of migrating corrosion inhibitor in mitigating chloride-induced corrosion. The migratory properties of the corrosion inhibitor and its ability to densify the matrix microstructure were confirmed through scanning electron microscopy and X-ray photoelectron spectroscopy analyses.