Evaluation of corrosion inhibition efficiency of Inkort 8MZ.VN applied in diesel generator cooling system operating in marine environment
DOI:
https://doi.org/10.54939/1859-1043.j.mst.IMBE.2025.228-234Keywords:
Steel CT3; Corrosion inhibitor; inkort 8MZ; Corrosion in NaCl solution; Electrochemistry.Abstract
This study investigates the corrosion inhibition performance of the Inkort 8MZ.VN inhibitor on CT3 carbon steel in 3.5% NaCl solution, corresponding to the salinity of seawater in Vietnamese coastal regions. The optimal inhibition efficiency (> 99%) was achieved with 2% Inkort 8MZ.VN, as evidenced by a significant decrease in corrosion rate, reduction in anodic/cathodic current densities, and a two-order-of-magnitude increase in total corrosion resistance (Rₙ = Rfilm + Rct). EIS analysis using a simulated Randles circuit confirmed the formation of a protective film (Rfilm) atop the electrical double layer, leading to reduced Cdl and enhanced Rct. These effects are consistent with microstructural observations from SEM. The results demonstrate that Inkort 8MZ.VN at its optimal concentration effectively protects against chloride-induced corrosion in diesel generator cooling systems operating in marine environment.
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