Abstract
Pogostemon quadrifolius methanolic stem extract (PQMSE) has been investigated as non toxic green corrosion inhibitor for mild steel in 1 M HCl. Corrosion rates were evaluated at 303 K, 313 K and 323 K by weight loss method at varying inhibitor concentrations. Using electrochemical impedence spectroscopy (EIS) and polarisation techniques, corrosion studies were done at 303 K in various inhibitor concentrations. Adsorption studies were also conducted to study the mechanism of corrosion inhibition. Scanning electron microscopy (SEM) and Fourier – transform infrared (FT-IR) spectroscopy were used to study the surface morphology of mild steel. Electrochemical studies reveal that PQMSE exhibit excellent corrosion inhibition efficiency and it function as a mixed type of inhibitor at 303 K. The surface interaction of PQMSE on mild steel in 1 M HCl was obeying Langmiur adsorption isotherm at all studied temperatures.
Highlights
Corrosion of metals has always been an interesting topic among corrosion scientists and engineers
Electrochemical studies reveal that Pogostemon quadrifolius methanolic stem extract (PQMSE) exhibit excellent corrosion inhibition efficiency and it function as a mixed type of inhibitor at 303 K
Due to natural origin,non toxic nature and negligible negative impacts on aquatic ecosystems,drugs were considered as ideal corrosion inhibitorslike many plant extracts until recent years (Raja and Sethuraman,2008; Newman et al, 2003; Newman and Cragg, 2007; Harvey, 2008; Struck et al, 2008).But not all drugs are readily biodegradable and their transformation products may be or even more hazardous to the environment and so more studies are needed before any drugs are concluded as ecofriendly corrosion inhibitor
Summary
Corrosion of metals has always been an interesting topic among corrosion scientists and engineers. Toxicity and high cost of manufacturing interrupted the extensive use of synthetic organic corrosion inhibitors. This resulted in the exploration of cheap biodegradable ecofriendly green corrosion inhibitors. Due to natural origin,non toxic nature and negligible negative impacts on aquatic ecosystems,drugs were considered as ideal corrosion inhibitorslike many plant extracts until recent years (Raja and Sethuraman,2008; Newman et al, 2003; Newman and Cragg, 2007; Harvey, 2008; Struck et al, 2008).But not all drugs are readily biodegradable and their transformation products may be or even more hazardous to the environment and so more studies are needed before any drugs are concluded as ecofriendly corrosion inhibitor. Natural plants extracts form a better green corrosion inhibitor. Electrochemical impedence spectroscopy, potentiodynamic polarization technique, FT –IR and SEM were employed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
