© Global Journal Of Pure And Applied Sciences . 2000. Vol. 6 No. 1
Publisher: Bachudo Science Co. Ltd
Inhibition of Mild Steel Corrosion In Hydrochloric Acid By 2-Aminopyridine and 2-(AMINOMETHYL) Pyridine
B.i. It A, 0. E. Offiong
KEYWORDS: Corrosion Inhibition, Pyridine, Mild Steel, Physlsorption
ABSTRACT:Weight loss measurements have shown that 2-aminopyridine (2AP) and 2-(aminomethyl)pyridine (2AMPI have. very important effects on the corrosion of mild steel in hydrochloric acid. Both substants tend to inhibit the corrosion of mild steel in hydrochloric acid to a remarkable extent with 2AMP exhibiting higher maximum inhibition efficiency of 94% than that of 2AP (90%). Generally,inhibition was found to increase with increase in inhibitor concentration and half-lite but with decrease in temperature and th'l rirt,t order rate constants at 30 and 40°C. Physisorption mechanism of adsorption has been proposec1 tor the inhibitors and the difference in the inhibition behaviour of the compounds has been explained in terms of difference in their molecular weights.
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