Liu Gang*,Yu Chaowen,Wu Bingbing,et al.Effect of lotus leaf extract on the corrosion resistance of Q235 steel[J].Plating & Finishing,2025,(02):38-45.
doi: 10.3969/j.issn.1001-3849.2025.02.006荷叶提取物对Q235钢耐蚀性能影响的研究
- Title:
- Effect of lotus leaf extract on the corrosion resistance of Q235 steel
- 分类号:
- TG178
- 文献标志码:
- A
- 摘要:
- 为了探究荷叶提取物在3.5 wt.%NaCl溶液中对Q235钢缓蚀性能的影响，本实验通过采用控制单一变量得出最佳工艺参数，并采用润湿角测试仪、金相显微镜和激光共聚焦显微镜对所形成的膜层进行了表征，利用失重法、电化学等分析测定荷叶提取物的缓蚀效率。结果表明：荷叶提取物可以在Q235钢表面吸附成膜，并且随着缓蚀剂浓度、浸泡时间、处理温度的增大，缓蚀效率呈现先增大后减小的趋势，且在最佳工艺参数(0.6 g/L、6 h、30 ℃)下，腐蚀电流密度最小为8.36×10–6 A·cm –2，电荷转移电阻最大为708 Ω·cm2，此时缓蚀效率高达98.25%。因此荷叶提取物可以有效抑制Q235钢在3.5 wt.%NaCl溶液中的腐蚀行为，有望成为一种环境友好的缓蚀剂。
- Abstract:
- In order to explore the influence of lotus leaf extract on the corrosion inhibition performance of Q235 steel in 3.5 wt.%NaCl solution, the optimal process parameters were obtained by using a single control variable. The film was characterized by wetting Angle tester, metallographic microscope and laser confocal microscope, and the corrosion inhibition efficiency of lotus leaf extract was determined by weight loss method and electrochemical analysis. The experimental results show that lotus leaf extract can be adsorbed on the surface of Q235 steel to form a film, and with the increase of corrosion inhibitor concentration, soaking time and treatment temperature, the corrosion inhibition efficiency increases first and then decreases. Under the optimal process parameters (0.6 g/L, 6 h, 30 ℃), the minimum corrosion current density is 8.36×10–6 A·cm –2. The maximum charge transfer resistance is 708 Ω·cm2, and the corrosion inhibition efficiency is up to 98.25%. Therefore, lotus leaf extract can effectively inhibit the corrosion behavior of Q235 steel in 3.5 wt.%NaCl solution, and is expected to become an environmentally friendly corrosion inhibitor
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