樟树叶提取液与碘化钾的缓蚀协同效应  

The Synergistic Inhibition Effect of Cinnamomum Camphor Leaves Extractive and Potassium Iodide

作　　者：郑兴文[1] 龚敏[1] 曾宪光[1] 姜春梅[1] 曾祥梅[1] 张婷[1] 

机构地区：[1]四川理工学院,自贡643000

出　　处：《表面技术》2011年第4期41-44,共4页Surface Technology

基　　金：四川理工学院材料腐蚀与防护四川省高校重点实验室项目(2007CL007)

摘　　要：采用电化学方法研究了樟树叶提取液(CCLE)和碘化钾复配后(FPCCLE),对Q235钢在硫酸溶液中的缓蚀协同效应,结果表明:樟树叶提取液与碘化钾复配后,腐蚀电流密度减小,腐蚀电位负移,脱附电位Edes正移,增大了缓蚀剂的有效作用范围,提高了缓蚀剂的吸附稳定性,表现出更好的缓蚀作用,且缓蚀效率随提取液浓度的增加而增大;樟树叶提取液与碘化钾组成的复配缓蚀剂属于混合抑制型缓蚀剂,作用机理为几何覆盖效应;樟树叶提取液和碘化钾在Q235钢表面的联合吸附为重叠吸附,吸附规律符合Langmuir吸附等温方程。The electrochemical method was used to study the synergistic effect between Cinnamomum camphor leaves extractive and potassium iodide for Q235 steel in sulfuric acid solution. The results showed that the corrosion cur rent density decreased, when Cinnamomum camphor leaves extractive complexed with potassium iodide, the desorption potential positively shifted and corrosion potential negatively shifted, so the effective inhibitor region was increased, the adsorption stability of inhibitor was improved, showing better corrosion inhibition performance. The inhibition efficiency increased with increasing the Cinnamomum camphor leaves extractive concentration. The composite inhibitor made up of Cinnamomum camphor leaves extractive and potassium iodide was a mixed-type inhibitor, and the inhibitor mechanism of which was coverage effect. The joint adsorption of Cinnamomum camphor Leaves and potassium iodide on the Q235 steel surface was mainly overlapping adsorption, and the adsorption conformed with Langmuir adsorption isotherm equa tion.

关 键 词：樟树叶 碘化钾 缓蚀剂 协同效应 

分 类 号：TG174.42[金属学及工艺—金属表面处理]