GU Yuan,SONG Yao.Acid Corrosion Inhibitor for Carbon Steel Extracted from Se-Rich Tea Leaves[J].Plating & Finishing,2022,(2):71-75.[doi:doi： 10.3969/j.issn.1001-3849.2022.02.015]
从富硒茶叶中提取碳钢酸洗缓蚀剂
- Title:
- Acid Corrosion Inhibitor for Carbon Steel Extracted from Se-Rich Tea Leaves
- 分类号:
- TG174.42
- 文献标志码:
- A
- 摘要:
-
采用水浸提取法制备含有富硒茶叶提取物（ SeTE ）的溶液。通过失重法、电化学法研究了在 1 mol·L-1 HCl 溶液中加入 SeTE 后碳钢材料的腐蚀规律，分析 SeTE 的缓蚀效率和缓蚀机理。研究表明： 25 ℃ 时，当干富硒茶叶与 1 mol·L-1 HCl 溶液的质量体积比为 20 g·L-1 时， SeTE 的缓蚀效率达到 96 % 。 SeTE 的缓蚀效率随温度的升高而降低，在 55 ℃ 时保持在 80 % 左右。 SeTE 在碳钢表面的吸附行为符合 Langmuir 吸附模型，使碳钢在 HCl 溶液中腐蚀过程的表观活化能增大，属于混合型缓蚀剂。
- Abstract:
-
A simple water extraction method was applied to produce solution containing Se-rich tea leaves extract （ SeTE ） . In this paper ， the inhibition efficiency and mechanism of SeTE on carbon steel in 1 mol·L-1 HCl solution were studied by weight loss method and electrochemical tests. The results showed that when the concentration ， defined by the mass to volume ratio of dry Se-rich tea leaves to the 1 mol·L-1 HCl solution ， reached 20 g·L-1 ， the corrosion inhibition efficiency of SeTE was more than 96 % at 25 ℃ . It was also suggested that the corrosion inhibition efficiency of SeTE decreased with raising temperature ， and declined to about 80 % at 55 ℃ . The adsorption of SeTE on the surface of carbon steel conformed to the Langmuir adsorption model ， which increased the apparent activation energy of corrosion reaction of carbon steel in HCl solution. And SeTE was a mixed-type corrosion inhibitor for carbon steel.
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备注/Memo
收稿日期： 2020-10-16 修回日期： 2021-01-11 作者简介： 郝鑫铭（ 2000 —），女，本科在读 通信作者： 周晓荣（ 1977 —），女，博士研究生，副教授， email ： zxrwhpu@163.com 基金项目： 2020 年校立大学生科研项目；湖北省自然科学基金项目（ 2020CFB777 ）