Abstract

The capacity of the Allium cepa L. extract from peel (ACP) and bulb (ACB) as a natural corrosion inhibitor for carbon steel was evaluated. The corrosion characterization was performed by a gravimetric test, showing an inhibitor efficiency of 60% (ACP) and 67% (ACB). Electrochemical tests indicated higher corrosion resistance for carbon steel in the presence of the extracts, and the SEM images of steel samples confirm the results. These extracts were analyzed by the DPPH (2,2-diphenyl-1-picrylhydrazyl) method, confirming the antioxidant activity. The chemical characterization of the extracts by FTIR measurements revealed the presence of phenolic compounds with antioxidant capacity.

Graphic Abstract

摘要

评估了从果皮（ACP）和鳞​​茎（ACB）提取的葱属洋葱提取物作为碳钢天然腐蚀抑制剂的能力。通过重量测试进行腐蚀表征，显示抑制剂效率为60％（ACP）和67％（ACB）。电化学测试表明，在存在萃取液的情况下，碳钢具有更高的耐腐蚀性，并且钢样品的SEM图像证实了结果。这些提取物通过DPPH（2,2-二苯基-1-吡咯肼基）方法进行分析，证实了其抗氧化活性。通过FTIR测量对提取物进行化学表征，发现存在具有抗氧化能力的酚类化合物。

图形摘要