植物型缓蚀剂提取及灰色系统对其效果评价  

EXTRACTION OF CORROSION IHIBITOR FORM PLANT AND APPRAISE OF INHIBITION EFFICIENCY BY GRAY SYSTEM

作　　者：刘峥[1] 林原斌[1] 高炅杨[2] 

机构地区：[1]湘潭大学化学学院,湘潭411104 [2]桂林工学院材料与化学工程系,桂林541004

出　　处：《腐蚀科学与防护技术》2007年第2期137-140,共4页Corrosion Science and Protection Technology

摘　　要：研制了一种环保型酸洗缓蚀剂.采用索氏提取法从橙皮中提取酸洗缓蚀成分,用静态失重法确定酸洗缓蚀剂的最佳缓蚀条件:在研究范围内,腐蚀温度控制在35℃,腐蚀时间5小时20分钟,盐酸酸度为2%,缓蚀剂浓度为0.5%时,缓蚀效果最好;而与六亚甲基四胺复配使用后,缓蚀效果更佳,缓蚀效率达到96%.利用电化学极化曲线对其缓蚀机理进行探讨,发现其为阳极型缓蚀剂.通过考察温度对缓蚀效率的影响,得出缓蚀剂的加入使碳钢在盐酸中溶解反应的活化能升高的结论.通过Frumk in吸附等温式的拟合计算,得到缓蚀成分在碳钢上的吸附为单分子层吸附,且吸附分子间表现为斥力.运用灰色模型GM(1.1)对缓蚀效果进行评价和预测,也得到较理想的结果.A new type of environmental-friendly corrosion inhibitor for carbon steel is prepared by extracting corrosion inhibitor from orange husk by using Soxhlet extractor. The inhibition efficiency of the inhibitors is investigated by measuring weight loss of the steel. The results show that the inhibition efficiency of the inhibitor of 0. 5% is the best for 2% HCl-solution at 35℃. Here the synergistic action of the inhibitors and sexa-methyl-tetra-amine is also investigated. The result shows that the synergy of the two compounds is so intensive to enable the corrosion inhibition efficiency higher than 90%. The corrosion current densities and corrosion potential for steel in HCl acid solution are measured. By the Tafel polarization curve,we can conclude that it＇s anionic inhibitor. The fitting of adsorption isotherm of Frumkin show that its molecules are absorbed on steel surface by single layer with repelling action between the adorpted molecules The resuits also show that the gray model GM （ 1,1 ） may be used to percast the peformance of the inhibitors.

关 键 词：酸洗缓蚀剂 橙皮 缓蚀效率 灰色系统 预测 

分 类 号：TG174.42[金属学及工艺—金属表面处理]