Abstract The extraction of Zea mays hairs (Z. mays) was carried out by soxhlet and ultrasound techniques and through three solvents. Phytochemical tests and quantitative analysis of total phenols content (TPC) and flavonoids content (FC) for all extracts were also determined. The antioxidant activity, for different fractions, was determined by using three methods; DPPH , FRAP and TAC. All extracts were rich in polyphenols and the analysis of TPC and FC showed that the hydro-ethanolic extract obtained by ultrasound was characterized by a significant amount of TPC and FC. The n-butanolic fraction was rich in FC and also had a very high antioxidant capacity. On the other hand, the inhibiting effect of hydro-ethanolic extract, n-butanolic fraction and standard (flavone) on mild steel corrosion in 1 M HCl solution was investigated by electrochemical measurements. The polarization curves along with EIS diagrams indicated that flavone was the major molecule responsible for inhibition and acted as mixed-type inhibitor with predominant control of cathodic reaction. The antioxidant activity of BF was well correlated to corrosion inhibition efficiency.

中文翻译：

---

玉米毛废料提取物在 1 M HCl 环境中对低碳钢的抗氧化和防腐活性的评价

摘要 利用索氏技术和超声技术，通过三种溶剂对玉米毛（Z. mays）进行提取。还确定了所有提取物的总酚含量 (TPC) 和类黄酮含量 (FC) 的植物化学测试和定量分析。使用三种方法测定不同组分的抗氧化活性；DPPH、FRAP 和 TAC。所有提取物都富含多酚，TPC 和 FC 的分析表明，通过超声获得的水乙醇提取物的特征在于含有大量的 TPC 和 FC。正丁醇馏分富含 FC 并且还具有非常高的抗氧化能力。另一方面，水乙醇提取物的抑制作用，通过电化学测量研究了正丁醇部分和标准（黄酮）对 1 M HCl 溶液中低碳钢腐蚀的影响。极化曲线和 EIS 图表明黄酮是负责抑制的主要分子，并作为混合型抑制剂，主要控制阴极反应。BF的抗氧化活性与缓蚀效率密切相关。