Sugar based N,N′-didodecyl-N,N′digluconamideethylenediamine gemini surfactant as corrosion inhibitor for mild steel in 3.5% NaCl solution-effect of synergistic KI additiveopen access
- Authors
- Aslam, Ruby; Mobin, Mohammad; Aslam, Jeenat; Lgaz, Hassane
- Issue Date
- Dec-2018
- Publisher
- Nature Publishing Group
- Citation
- Scientific Reports, v.8, no.1, pp 1 - 20
- Pages
- 20
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- Scientific Reports
- Volume
- 8
- Number
- 1
- Start Page
- 1
- End Page
- 20
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/114813
- DOI
- 10.1038/s41598-018-21175-6
- ISSN
- 2045-2322
- Abstract
- The inhibitory behaviour of non-ionic sugar based N,N′-didodecyl-N,N′-digluconamideethylenediamine gemini surfactant, designated as Glu(12)-2-Glu(12) on mild steel (MS) corrosion in 3.5% NaCl at 30-60 °C was explored using weight loss, PDP, EIS and SEM/EDAX/AFM techniques. The compound inhibited the corrosion of mild steel in 3.5% NaCl and the extent of inhibition was dependent on concentration and temperature. The inhibiting action of Glu(12)-2-Glu(12) is synergistically enhanced on addition of potassium iodide (KI) at all concentrations and temperatures. The inhibiting formulation comprising of 2.5 × 10-3 mM of Glu(12)-2-Glu(12) and 10 mM of KI exhibits an inhibition efficiency of 96.9% at 60 °C. Quantum chemical calculations and MD simulation were applied to analyze the experimental data and elucidate the adsorption behaviour and inhibition mechanism of inhibitors. MD simulation showed a nearly parallel or flat disposition for Glu(12)-2-Glu(12) molecules on the MS surface providing larger blocking area to prevent the metal surface from corrosion. © 2018 The Author(s).
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