Abstract
The inhibition of corrosion of mild steel in hydrochloric acid solutions by 2-benzoylpyridine (2BP) and pyridoxolhydrochloride (PXO) at 303K, 313K and 323K has been investigated using weight loss and hydrogen evolution techniques. 2BP exhibited higher maximum inhibition efficiency (78.99%) than PXO (71.93%). Generally inhibition was found to increase with increasing inhibitor concentration and decreasing temperature. A first order type of mechanism has been deduced from the kinetic treatment of the results and the process of inhibition was attributed to physisorption. The difference in the inhibition behaviour of the two compounds has been explained on the basis of structure dependent electron donor properties of the inhibitors
Highlights
The serious consequences of corrosion tend to jeopardize safety and inhibit technology progress because of the vital role of metal to the world economy[1]
The inhibition of steel corrosion has continued to pose a lot of problems for scientists and engineers[3]
Several N- and S- containing organic compounds have been employed as inhibitors for the corrosion of mild steel in hydrochloric acid solutions at certain concentrations and temperatures[4,5,6,7]
Summary
The serious consequences of corrosion tend to jeopardize safety and inhibit technology progress because of the vital role of metal to the world economy[1]. Several N- and S- containing organic compounds have been employed as inhibitors for the corrosion of mild steel in hydrochloric acid solutions at certain concentrations and temperatures[4,5,6,7]. This present investigation is aimed at studying the inhibition of mild steel corrosion in hydrochloric acid by 2-benzoylpyridine and pyridoxol hydrochloride via weight loss and hydrogen evolution techniques (gasometric assembly).
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