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首页> 外文期刊>International Journal of Electrochemical Science >Chemical Composition and Anti-Corrosive Activity of Pulicaria Mauritanica Essential Oil Against the Corrosion of Mild Steel in 0.5 M H2SO4
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Chemical Composition and Anti-Corrosive Activity of Pulicaria Mauritanica Essential Oil Against the Corrosion of Mild Steel in 0.5 M H2SO4

机译：毛白杨精油在0.5 M H 2 SO 4 中的化学成分及对低碳钢的腐蚀防护性能

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摘要

Essential oil of aerial parts of Pulicaria mauritanica was obtained by hydrodistillation and analyzed byGC and GC/MS. This oil was tested as corrosion inhibitor of mild steel in 0.5M H2SO4 using weightloss measurements, electrochemical polarization and EIS methods. The analysis of P. mauritanicaessential oil allowed the identification of 25 components, which accounted for 94.3% of the total oilwhich Carvotanacetone was the predominant compound constituting 87.3%. The inhibitory effect ofthis essential oil was estimated on the corrosion of mild steel in 0.5M H2SO4 using electrochemicalpolarisation and weight loss measurements. The corrosion rate of mild steel is decreased in thepresence of essential oil. The inhibition efficiency was found to increase with oil concentration toattain 91.5% at 2g/L. Polarisation curves revealed that this oil act as mixed type inhibitor with a strongpredominance of cathodic character. The temperature effect on the corrosion behaviour of mild steel in0.5M H2SO4 without and with the inhibitor at 2 g/L was studied in the temperature range from 303 and343 K. The adsorption of inhibitor onto the mild steel surface was found to be a spontaneous processand to follow the Langmuir adsorption isotherm. The associated activation energy has beendetermined.
机译：通过加氢蒸馏得到毛白杨地上部分的精油，并通过GC和GC / MS进行分析。使用失重测量，电化学极化和EIS方法，将该油作为0.5M H2SO4中低碳钢的腐蚀抑制剂进行了测试。通过对毛里塔尼亚毛精油的分析，可以鉴定出25种成分，占总油量的94.3％，其中以甲氧丙酮为主要成分，占87.3％。通过电化学极化和失重测量，评估了该精油对0.5M H2SO4中低碳钢腐蚀的抑制作用。存在精油时，低碳钢的腐蚀速率降低。发现当油浓度为2g / L时，抑制效率随油浓度的增加而增加。极化曲线表明，该油是一种混合型抑制剂，具有很强的阴极特性。在303和343 K的温度范围内研究了温度对0.5M H2SO4中含和不含缓蚀剂的低碳钢腐蚀行为的影响。发现缓蚀剂在低碳钢表面上的自发吸附。过程并遵循Langmuir吸附等温线。已经确定了相关的活化能。

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