钓鱼慈竹竹叶提取物在H_2SO_4中对钢的缓蚀作用  

Corrosion inhibition of Neosinocalamus affinis leaves extractive for steel in H_2SO_4 solution

作　　者：李向红[1] 付惠[1] 邓书端[2] 

机构地区：[1]西南林学院基础部,云南昆明650224 [2]西南林学院木质科学与装饰工程学院,云南昆明650224

出　　处：《清洗世界》2010年第2期23-28,共6页Cleaning World

基　　金：西南林学院面上科研基金项目(200818M);西南林学院林产化工加工工程校级重点学科建设项目(XKX200907)

摘　　要：钓鱼慈竹(Neosinocalamus affinis)竹叶提取物可作为一种环境友好型植物缓蚀剂。采用失重法和动电位极化曲线研究了钓鱼慈竹竹叶提取物在0.5mol/L H2SO4溶液中对冷轧钢的缓蚀作用。结果表明:钓鱼慈竹竹叶提取物具有良好的缓蚀作用,为混合抑制型缓蚀剂,且在钢表面的吸附符合Langmuir吸附等温式。通过van’t Hoff方程和Arrhenius公式求出了吸附热ΔHads和表观活化能Ea,并据此讨论了缓蚀作用机理。The extractive from Neosinocalamus affinis leaves was investigated as an excellent environ- mentally-friendly plant inhibitor. The inhibition effect of the plant extractive on the corrosion of cold rolled steel （CRS） in 0. 5 mol/L H2SO4 has been studied zation methods. The results show that the Neosinocalamus by we afflnis ight loss and potentiodynamic polarileaves extractive is a good inhibitor, and the adsorption of the plant inhibitor on the CRS surface follows the Langmuir adsorption isotherm equation. Polarization curves show that the plant inhibitor is a mixed-type inhibitor in sulfuric acid. The experimental data have been treated with van＇ t Hoff and Arrhenius equations. The adsorption heat △Hads, and apparent activation energy Eo are also calculated, and the inhibitive mechanism isdiscussed in detail according to the parameters.

关 键 词：钓鱼慈竹 硫酸 萃取 缓蚀剂 吸附 

分 类 号：TG174.42[金属学及工艺—金属表面处理]