Inhibition of steel corrosion in hydrochloric acid by pyridoxal, 4-methylthiosemicarbazide, pyridoxal-(4-methylthiosemicarbazone) and its Zn(II) complex

被引：64
作者：
Ita, BI
Offiong, OE
机构：
[1] Chemistry Department, University of Calabar, Calabar, Cross River State
来源：
MATERIALS CHEMISTRY AND PHYSICS | 1997年 / 48卷 / 02期
关键词：
corrosion inhibition; pyridoxal; thiosemicarbazone; mild steel; physisorption;
D O I：
10.1016/S0254-0584(97)80113-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of pyridoxal (PHC), 4-methylthiosemicarbazide (4MTS), pyridoxal-(4)-methylthisemicarbazone) (P4TS) and Zn(II)-pyridoxal-(4-methylthiosemicarbazone) (ZnP4TS) has been studied. Weight loss and hydrogen evolution measurements reveal that ZnP4TS exhibit a higher maximum inhibition efficiency than P4TS, PHC and 4MTS. Generally, inhibition was found to increase with increase in inhibitor concentration, half-life, activation energy and with decrease in the first-order rate constants at 30 and 40 degrees C. Physical adsorption mechanism has been proposed for the inhibitors and the difference in the inhibition behaviour of the compounds has been explained in terms of the difference in their molecular weights.
引用
收藏
页码：164 / 169
页数：6
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