Abstract
Mass loss techniques have been employed to study the corrosion inhibition of some newly synthesized Schiff bases.viz.N-4-(Diethyl amino) salicylidine-2-amino-5-chloropyridine (SB1),N-(4-ethylbenzalidine)-2-amino-5-chloropyridine (SB2),N-(4-ethylbenzalidine)-2-amino-5-bromopyridine (SB3),N-4-(Diethyl amino) salicylidine-2-amino-5-bromopyridine (SB4) for mild steel in HCl and H2SO4solutions. Results of inhibition efficiencies from the mass loss technique show that Schiff bases are good inhibitors in both the acidic solutions. Inhibition efficiencies increase with the increase in the concentration of acids as well as those of inhibitors. Maximum efficiency for H2SO4was found 99.78% and for HCl it was 97.92%.
Highlights
Mild Steel is an important metal regarding to its wide applications in industry in various mechanical and structural purposes, like in bridgework, industrial parts, steam engine parts, automobiles, for ship hulls and off shore drilling platforms etc
Mild steel is passive towards an alkali but it is prone to corrosion in acids like HCl and H2SO4 solutions
It is observed from both the tables that corrosion rate of mild steel decreases with the increase in the concentrations of inhibitors where as corrosion rate increases with the increase in the strength of HCl and H2SO4 solutions
Summary
Mild Steel is an important metal regarding to its wide applications in industry in various mechanical and structural purposes, like in bridgework, industrial parts, steam engine parts, automobiles, for ship hulls and off shore drilling platforms etc. Mild steel is passive towards an alkali but it is prone to corrosion in acids like HCl and H2SO4 solutions.
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