Abstract
Corrosion inhibition mechanism of Polyaspartic acid (PASP) as eco-friendly polymer on mild steel in aerated 3% NaCl solution was investigated utilizing electrochemical, thermodynamic, microscopic and computational chemistry techniques. Electrochemical results confirm moderate inhibition efficiency of PASP reaching 61% at 2.0 g/L by forming an adsorption layer on metal surface. Zinc ion addition enhanced the efficiency to 97% at 0.5 g/L of PASP through a synergistic effect mechanism. Scanning electronic microscopy (SEM) and Atomic force microscopy (AFM) micrographs revealed the morphology of adsorption layer indicates anodic inhibition mechanism of PASP. Quantum calculation and Monte Carlo simulation provided molecular level insights into the adsorption mechanism of PASP on steel surface which were consistent to the experimental findings.
| Original language | English |
|---|---|
| Pages (from-to) | 50-62 |
| Number of pages | 13 |
| Journal | Journal of Molecular Liquids |
| Volume | 250 |
| DOIs | |
| State | Published - Jan 2018 |
Bibliographical note
Publisher Copyright:© 2017 Elsevier B.V.
Keywords
- Corrosion inhibitor
- Green chemistry
- Green inhibitor
- Mild steel
- Polyaspartic acid
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Spectroscopy
- Physical and Theoretical Chemistry
- Materials Chemistry