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首页> 外文期刊>International Journal of Electrochemical Science >Evaluation of Eulychnia acida Phil. (Cactaceae) Extracts as Corrosion Inhibitors for Carbon Steel in Acidic Media.
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Evaluation of Eulychnia acida Phil. (Cactaceae) Extracts as Corrosion Inhibitors for Carbon Steel in Acidic Media.

机译：酸大戟的评价。 （仙人掌科）提取物在酸性介质中作为碳钢的腐蚀抑制剂。

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摘要

The process of pickling to remove corrosion products in metal pipes requires the use of an acidicsolution together with corrosion inhibitors to protect the metal. However, the use ofsynthetic/commercial inhibitors has caused environmental pollution and human health problems. As aresult, studies have begun to analyse natural extracts from several different plants as potentialcorrosion inhibitors, as they are generally more innocuous and/or biodegradable. The present studyevaluates the effectiveness of aqueous extracts obtained from Eulychnia acida Phil. (Cactaceae) aspotential corrosion inhibitors for carbon steel in acidic media. The total phenolic compound andflavonoid content of the aqueous extracts of the cactus species was determined prior to theexperiments. The inhibition efficiency of the extracts obtained by decoction of the external bark,internal bark and medulla of the cactus stems were evaluated by mass loss, demonstrating an efficiencyof 90% at concentrations of 100 and 1000 ppm. The polarization curve tests indicate an efficiency ofover 80% inhibition at concentrations of 1000 and 1500 ppm. The results show that metabolitespresent in the extracts act as corrosion inhibitors and are able to promote surface protection byblocking active sites on the metal.
机译：进行酸洗以去除金属管道中的腐蚀产物的过程要求使用酸性溶液以及腐蚀抑制剂来保护金属。然而，使用合成/商业抑制剂已经引起环境污染和人类健康问题。结果，研究已经开始分析来自几种不同植物的天然提取物作为潜在的腐蚀抑制剂，因为它们通常是无害的和/或可生物降解的。本研究评估了从酸枝大戟中提取的水提取物的有效性。 （仙人掌科）酸性介质中碳钢的潜在腐蚀抑制剂。在进行实验之前，先确定仙人掌类水提取物的总酚类化合物和类黄酮含量。通过质量损失评价通过外层皮，内层皮和仙人掌茎髓质的煎煮获得的提取物的抑制效率，在浓度为100和1000 ppm时，效率为90％。极化曲线测试表明，在浓度为1000和1500 ppm时，抑制效率超过80％。结果表明，提取物中存在的代谢物起腐蚀抑制剂的作用，并能够通过阻断金属上的活性位点来促进表面保护。

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