Weight loss and thermometric methods have been used to study the corrosion inhibition of mild steel in acidic solution (HCl and H 2 SO 4 ) by Schiff's bases viz. N-(4-N,N-dimethylaminobenzal)-p-anisidine (SB 1 ), N-(4-N,N-dimethylaminobenzal)-p-toluidine (SB 2 ) and N-(4-N,N-dimethylaminobenzal)-2,4-dinitroaniline (SB 3 ). The efficiencies have been compared with those of parent amines from which Schiff's bases have been derived. Results of inhibition efficiencies observed from these two methods are in good agreement and have been found to be dependent on the concentrations of inhibitors as well as those of acids. Inhibition efficiency of all inhibitors increases with increasing concentration of inhibitors. Efficiency also increases with increasing concentration of acids. Inhibition efficiency is more in case of HCl rather than in H 2 SO 4 . Inhibition efficiency was found maximum up to 95.55% for mild steel in HCl solution. Inhibition efficiencies of synthesised Schiff's bases have been found much more than their parent amines. It was observed that inhibition efficiency of all amines increases with increasing concentration of amines but decreases with increasing concentration of HCl and H 2 SO 4 .
Weight loss technique has been used to study the corrosion inhibition efficiency of tin in HNO 3 solution by using the leaves and stem extract of different varieties of Holy Basil viz. Ocimum basilicum (E B ), Ocimum cannum (E C ) and Ocimum sanctum (E S ). The results show that all the varieties under study are good corrosion inhibitors, among which leaves extract of E B is the most effective. Corrosion inhibition efficiency increases with increasing concentration of inhibitor and it also increases with increasing concentration of HNO 3 solution. Inhibition efficiency was found maximum up to 96.19% for tin with 0.6% leaves extract.
ABSTRACT. Corrosion inhibition efficiencies of holy basil on Al in HCl solution were studied by weight loss and thermometric methods in presence and in absence of stem extract of three different varieties of holy basil viz. ocimum basilicum (EB), ocimum canum (EC) and ocimum sanctum (ES). Inhibition efficiency increases with the increasing concentration of stem extract and decreases with increases in acid strength. Results show that all varieties under study are good corrosion inhibitors, among which, EB is most effective. Maximum inhibition efficiency was found 97.09% in 0.5N HCl solution with 0.6% stem extract. The Langmuir adsorption isotherm indicates that surface coverage also increases with increasing in the concentration of extract of stem in HCl solution.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.