海水中一种曼尼希碱对20#钢缓蚀行为的电化学特征  

ELECTROCHEMICAL CHARACTERISTICS OF CORROSION INHIBITING BEHAVIOR OF A KIND OF MANNICH BASE ON 20# CARBON STEEL IN SEAWATER

作　　者：皇甫健[1] 侯纯扬[1,2] 高翔[2] 张正[2] 高丽丽[2] 王海增[1] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100 [2]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《水处理技术》2012年第10期54-56,69,共4页Technology of Water Treatment

基　　金：国家海洋公益性行业科研专项经费项目(201005023)

摘　　要：根据曼尼希反应的基本原理,设计并制备了一种水溶性的曼尼希碱缓蚀剂(MNX-B)。采用红外和质谱测试,分析了MNX-B的分子结构特征。采用极化曲线和电化学阻抗谱测试,研究了MNX-B及其氯化铈CeCl3对海水中20#钢的缓蚀作用机理。研究表明,MNX-B为吸附成膜、以抑制20#钢海水腐蚀的阳极反应为主的混合控制型缓蚀剂,单剂的缓蚀作用较为有限;MNX-B与阴极沉淀型缓蚀剂CeCl3可产生明显的协同增效作用,共同抑制20#钢海水腐蚀。According to the basic principle of Mannich reaction, we had designed and prepared a kind of water-soluble Mannich base as corrosion inhibitor,which code name was MNX-B. The molecular structure characteristics of MNX-B had been analyzed by IR and mass spectrometry. Corrosion and inhibition mechanism of MNX-B and complex formulation of MNX-B and CeCl3 on 20# carbon steel had been studied by polarization and electrochemical impedance spectroscopy （EIS） in seawater. The results showed that the inhibition mechanism of MNX-B was film forming by adsorption on 20# carbon steel and it belonged to the mixed type of anodic inhibitor in seawater, the inhibition effect of the single dose was relatively finite. After formulated with MNX-B and CeCl3 which was the deposit type of cathodic one, they exhibited a significant collaborative synergism and showed interaction of inhibiting corrosion on 20＊ carbon steel in seawater.

关 键 词：曼尼希碱 海水 20#钢 氯化铈 缓蚀 

分 类 号：TQ085.412[化学工程]