Inhibitory effect of sodium carboxymethylcellulose and synergistic biodegradable gemini surfactants as effective inhibitors for MS corrosion in 1 M HCl

Publication date: Available online 18 August 2019Source: Journal of Materials Research and TechnologyAuthor(s): Ruby Aslam, Mohammad Mobin, Jeenat Aslam, Hassane Lgaz, Ill-Min ChungAbstractThe aim of this paper is to study the anticorrosive performance of the polymer–surfactants system comprising of mixed solutions of varying concentrations (10–700 ppm) of sodium salt of carboxymethylcellulose (NaCMC) and fixed concentration (1 ppm) of synthesized oppositely charged biodegradable cationic di-ester bonded gemini surfactants i.e., ethane-1,2-diylbis(N,N-dimethyl-N-alkylammoniumacetoxy)dichloride, referred as m-E2-m, (where m = 12, 14, 16, the number of carbon atoms in alkyl chain and E2 is the di-ester group in gemini’s spacer part), for mild steel in 1 M HCl solution. The inhibition effect of mixed NaCMC - gemini surfactant system was examined using weight loss measurement, potentiodynamic polarization (PP) measurements, electrochemical impedance (EIS) measurements, surface morphological observation by scanning electron microscopy (), and molecular dynamics simulation study. NaCMC alone was observed to offer moderate inhibition efficiency (IE) of 57.3% at 500 ppm, which was synergistically increased in the presence of very small amount of synthesized gemini surfactants. The improvement in IE was highly dependent on the surfactant tail length; the maximum improvement in IE of 90.1% was observed in presence of 16-E2-16. The adsorption of the studied systems fol...
Source: Journal of Materials Research and Technology - Category: Materials Science Source Type: research