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Studies on the inhibitive effect of Occimum viridis extract on the acid corrosion of mild steel

机译：西方景天提取物对低碳钢酸腐蚀的抑制作用研究

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摘要

Corrosion inhibition of mild steel in 2M HCl and 1M H_2SO_4 by leaf extracts of Occimum viridis (OV) was studied using the gasometric technique at temperatures of 30 and 60℃. The results indicate that the extracts inhibit the corrosion process in both acid media and inhibition efficiency increased with concentration. Synergistic effects increased the inhibition efficiency in the presence of halide additives namely KCl, KBr, KI. Temperature studies revealed a decrease in efficiency with rise in temperature and corrosion activation energies increased in the presence of the extract, probably implying that physical adsorption of cationic species may be responsible for the observed inhibition behaviour. Comparative analysis of the inhibitor adsorption behaviour in 2M HCl and 1M H_2SO_4 as well as the effect halide additives suggest that cationic species may not be the only constituents responsible for the inhibiting action of the extract.
机译：研究了在20℃和30℃温度下用气相色谱技术提取的Occimum viridis（OV）叶片提取物对2M HCl和1M H_2SO_4中低碳钢的腐蚀抑制作用。结果表明，提取物在两种酸性介质中均能抑制腐蚀过程，且抑制效率随浓度的增加而增加。在卤化物添加剂即KCl，KBr，KI的存在下，协同作用提高了抑制效率。温度研究表明，随着萃取物的存在，效率随温度的升高而降低，腐蚀活化能增加，这可能暗示阳离子物质的物理吸附可能是所观察到的抑制行为的原因。抑制剂在2M HCl和1M H_2SO_4中的吸附行为以及卤化物添加剂的对比分析表明，阳离子物质可能不是导致提取物抑制作用的唯一成分。

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