不同方法制备的虎杖提取物对A3碳钢的防腐蚀性能  

Anti-Corrosion Properties on A3 Carbon Steel of Polygonum cuspidatum Extract Prepared by Different Methods

作　　者：李浚哲 孙雪君 王念 王飞扬 周军[1] 李湘洲[1] Li Junzhe;Sun Xuejun;Wang Nian;Wang Feiyang;Zhou Jun;Li Xiangzhou(School of Material Science and Engineering,Institute of Natural Product Research and Development,Central South University of Forestry and Technology,Changsha,Hunan 410004,Chitia)

机构地区：[1]中南林业科技大学材料科学与工程学院,天然产物加工利用研究所,湖南长沙410004

出　　处：《化学世界》2021年第2期123-128,共6页Chemical World

基　　金：十三五国家重点研发计划(No.2016YFD0600805)资助项目。

摘　　要：以中药虎杖为原料,分别利用超声波辅助提取法和酶法辅助超声波提取法制备虎杖提取物Ⅰ~Ⅱ,采用失重法和电化学法研究虎杖提取物Ⅰ~Ⅱ在盐酸介质中对A3碳钢的防腐蚀效果。结果表明,虎杖提取物对A3碳钢的防腐蚀效果受温度和提取物质量浓度的影响较大,且虎杖提取物Ⅰ的缓蚀效果优于虎杖提取物Ⅱ,在温度为10℃、提取物质量浓度为200 mg/L时,虎杖提取物Ⅰ对A3碳钢的缓蚀率最高为84.86%。极化曲线与电化学阻抗谱的结果表明,虎杖提取物对A3碳钢的缓蚀机理为几何覆盖效应,虎杖提取物为混合型缓蚀剂。The ultrasonic and enzymatic assisted ultrasonic extraction were used to prepare Polygonum cuspidatum extract Ⅰ and Ⅱ from a traditional Chinese medicine of Polygonum cuspidatum, respectively. The weight loss and electrochemical method were applied to study the effect on anti-corrosion of A3 carbon steel in HCl medium. The results showed that the effect of Polygonum cuspidatum extract on anti-corrosion of A3 carbon steel was significantly influenced by temperature and extract mass concentration. The effect of Polygonum cuspidatum extract Ⅰ was better than that of extract Ⅱ. The maximum anti-corrosion rate of Polygonum cuspidatum extract Ⅰ was as high as 84.86% at 10 ℃ with a mass concentration of 200 mg/L. The results of polarization curve and electrochemical impedance spectrum showed that the inhibition mechanism of Polygonum cuspidatum extract on A3 carbon steel was geometric coverage effect so that Polygonum cuspidatum extract is a mixed-type corrosion inhibitor.

关 键 词：超声波提取 酶法辅助超声波提取 虎杖提取物 A3碳钢 防腐蚀 

分 类 号：TG17[金属学及工艺—金属表面处理]