硫酸介质中竹叶提取物的阳极脱附行为  

Anodic Desorption of Bamboo Leaves Extract in Sulfuric Acid

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：《腐蚀与防护》2011年第10期788-792,共5页Corrosion & Protection

基　　金：四川省高校重点实验室项目(2007CL007)

摘　　要：采用极化曲线和微分极化曲线研究了竹叶提取物及其与碘化钾复配后试验体系的阳极脱附行为。结果表明,随竹叶提取物浓度的增加,对碳钢的缓蚀效率增大,脱附电位正移;随温度的增加,缓蚀效率下降,脱附电位负移;竹叶提取物与碘化钾复配后,脱附电位进一步正移,腐蚀电位负移,增加了缓蚀剂的作用区域,提高了缓蚀剂的吸附稳定性。缓蚀效率随复配缓蚀剂浓度的增加而增大,随温度的增加变化很小;脱附电位与浓度的对数值及温度呈线性关系,竹叶提取物与碘化钾的联合吸附以交错吸附为主。The anodic desorption of bamboo leaves extract and its complex with KI in sulfuric acid was investigated by polarization curves and differential polarization curves. The results showed that the inhibition efficiency increased and the desorption potential positively shifted with the increase of concentration of the bamboo leaves extract. The inhibition efficiency decreased and the desorption potential negatively shifted with the increase of the temperature. After the bamboo leaves extract was composited with KI, the desorption potential positively shifted and the corrosion potential negatively shifted, and thus made the inhibitor region wider and the adsorption stability of inhibitor better. The inhibition efficiency of complex inhibitor increased with the increase of concentration of bamboo leaves extract, and the change was little with the increase of temperature. The desorption potential was linear with the value of logarithm of the concentration and temperature, so the absorption model of bamboo leaves and KI on the carbon steel surface was mainly staggered absorption.

关 键 词：竹叶 碳钢 硫酸 碘化钾 阳极脱附 

分 类 号：TG174.42[金属学及工艺—金属表面处理]