欢迎访问《林产化学与工业》，
林产化学与工业

林产化学与工业 ›› 2013, Vol. 33 ›› Issue (2): 129-133.doi: 10.3969/j.issn.0253-2417.2013.02.023

• 研究报告 • 上一篇    下一篇

金竹竹叶提取物在HCl中对铝的缓蚀作用研究

刘建祥1, 王瑞苓2, 付惠1, 李向红1   

  1. 1. 西南林业大学 理学院, 云南 昆明 650224;2. 西南林业大学 林学院, 云南 昆明 650224
  • 收稿日期:2012-08-13 修回日期:1900-01-01 出版日期:2013-04-30 发布日期:2013-04-30

Corrosion Inhibition of Extracts from Phyllostachy sulphurea Leaves for Aluminum in HCl Solution

LIU Jian-xiang1, WANG Rui-ling2, FU Hui1, LI Xiang-hong1   

  1. 1. Faculty of Science, Southwest Forestry University, Kunming 650224, China;2. Faculty of Forestry, Southwest Forestry University, Kunming 650224, China
  • Received:2012-08-13 Revised:1900-01-01 Online:2013-04-30 Published:2013-04-30

PDF (PC)

717

摘要： 通过红外光谱(FT-IR)分析,表征了金竹竹叶提取物(PSLE)的主要官能团,利用失重法、电化学阻抗谱研究了PSLE在1.0 mol/L HCl介质中对铝的缓蚀作用。结果表明,PSLE具有较好的缓蚀作用,最大缓蚀率达77.7 %,竹叶提取物的缓蚀率在20和30 ℃时效果较好,在铝表面的吸附符合Langmuir吸附校正模型,通过Van't Hoff方程求出吸附热(ΔHads),讨论了缓蚀作用机理,吸附过程是一个自发放热的过程。通过电化学阻抗谱,表明缓蚀剂在铝表面发生吸附后使电荷传递明显抑制,PSLE为混合抑制型缓蚀剂。

关键词: 金竹, 提取物, 铝, 缓蚀, 盐酸, 吸附

Abstract: Fourier transform infrared(FT-IR) spectroscopy was employed to characterize the main functional groups of extracts from Phyllostachy sulphurea leaves(PSLE). The inhibition effect of PSLE on the corrosion of aluminum in 1.0 mol/L HCl was studied by mass loss and electrochemical impedance spectroscopy(EIS).The results showed that the PSLE was a good inhibitor in hydrochloric acid for aluminum, and the maximum inhibition efficiency was 77.7 %. The corrosion inhibition of bamboo leaves was good at 20 ℃ and 30 ℃.The adsorption of PSLE on the aluminum surface obeys the Langmuir adsorption isotherm equation. Adsorption heat ΔHads was calculated by Van't Hoff, and the inhibition mechanism was discussed in detail according to the parameters. All EIS exhibited that corrosion inhibitor at the aluminum surface had good are resistance. PSLE was a mix-type inhibition.

Key words: Phyllostachy sulphurea, extract, aluminum, inhibition, hydrochloric acid, adsorption

中图分类号: 

版权所有 © 中国林业科学研究院林产化学工业研究所　苏ICP备08107184号-3