葫芦藓提取物在HCl中对X70钢的缓蚀作用研究  

Corrosion inhibition action of funaria hygrometrica extracts for X70 steel in hydrochloric acid medium

作　　者：陆美 陈书军 唐加有 罗景敏 吴词 LU Mei;CHEN Shu-jun;TANG Jia-you;LUO Jing-min;WU Ci(School of Chemistry and Chemical Engineering,Zunyi Normal University,Zunyi 563006,China)

机构地区：[1]遵义师范学院化学化工学院,贵州遵义563006

出　　处：《现代化工》2025年第4期218-223,共6页Modern Chemical Industry

基　　金：贵州省自然科学基金资助项目(黔科合基础-ZK[2022]569号);服务地方产业革命项目(CXY[2024]01号);遵义师范学院项目(遵师BS[2019]11号);贵州省大学生创新创业训练计划项目(202310664054号)。

摘　　要：研究了葫芦藓提取物(HLX)在1 mol/L盐酸中对X70钢的缓蚀能力。结果表明,HLX作为一种混合型植物缓蚀剂,能有效减缓X70钢在盐酸中阴阳极的腐蚀速率;缓蚀效率随HLX质量浓度提高而增加,随溶液温度上升而降低;当温度为293 K、HLX质量浓度为0.8 g/L时,缓蚀效率可达93.12%。等温吸附研究表明,HLX分子可以自发地吸附在X70钢表面,且符合Langmuir吸附等温式。此外量子化学研究结果表明,HLX分子上的杂原子能与金属表面形成配位键而产生稳定的吸附。The corrosion inhibition ability of funaria hygrometrica extracts(HLX)for X70 steel in 1 mol.L^(-1) hydrochloric acid medium is evaluated,and the results validate that HLX as a mixed-type corrosion inhibitor can effectively suppress both cathodic and anodic reactions of X70 steel in hydrochloric acid.The corrosion inhibition efficiency of HLX for X70 steel improves with the higher HLX concentration,and depresses with the higher solution temperature.The corrosion inhibition rate can reach 93.12%at 293 K and a HLX mass concentration of 0.8 g·L^(-1).It is indicated by isothermal adsorption study that HLX can be spontaneously adsorbed on X70 steel surface,which obeys Langmuir adsorption isotherm.In addition,it is shown from quantum chemical calculation that a coordination bond is built between hetero-atoms of HLX molecular and X70 steel surface,resulting in a stable adsorption.

关 键 词：盐酸 缓蚀 X70钢 葫芦藓 接触角 

分 类 号：TG174[金属学及工艺—金属表面处理]