摘要
以油酸和羟乙基乙二胺为原料,经酰胺化、环化反应生成咪唑啉中间体,咪唑啉中间体与环氧乙烷反应得到乙氧基化咪唑啉阻锈剂。通过失重法、盐水浸渍法、盐水浸烘实验、电化学综合实验和SEM评价了该阻锈剂对Q235碳钢在质量分数3.5%NaCl的饱和Ca(OH)_(2)溶液的阻锈性能,通过水泥净浆流动性实验测试该阻锈剂对混凝土流动性的影响。结果表明,该阻锈剂在质量分数3.5%NaCl的饱和Ca(OH)_(2)腐蚀介质中能有效地保护Q235碳钢免遭腐蚀。该阻锈剂是以抑制阳极反应为主的混合型阻锈剂,当阻锈剂掺量为4%(以腐蚀介质质量为基准)时,碳钢的阻锈效率达到99.13%,SEM显示碳钢表面光滑平整。该阻锈剂对混凝土流动性无明显不利影响。
An imidazoline intermediate was synthesized through amidation and cyclization reactions between oleic acid and hydroxy ethyl ethylene diamine.And then the imidazoline intermediate reacted with ethylene oxide to obtain an ethoxylated imidazoline rust inhibitor.The corrosion inhibition performance of the rust inhibitor on Q235 carbon steel in mass fraction 3.5%NaCl saturated Ca(OH)_(2) was evaluated by weight loss method,salt water immersion method,salt water immersion drying experiment,electrochemical comprehensive experiment and SEM.The influence of the rust inhibitor on the concrete fluidity was tested by cement paste fluidity experiment.The results showed that the rust inhibitor could effectively protect Q235 carbon steel from corrosion in mass fraction 3.5%NaCl saturated Ca(OH)_(2) corrosive medium.The rust inhibitor was a mixed type rust inhibitor which mainly inhabited the anode reaction.When the appropriate fraction of rust inhibitor was 4%,the corrosion inhibition efficiency of the carbon steel reached 99.13%.SEM result revealed that the surface of carbon steel was smooth and flat.In addition,the rust inhibitor had no obvious adverse effect on the fluidity of concrete.
作者
杨振声
杨健
张晓娟
王冰
YANG Zhensheng;YANG Jian;ZHANG Xiaojuan;WANG Bing(School of Petrochemical Engineering,Shenyang University of Technology,Liaoyang 111000,Liaoning,China;Evonik Big(Liaoyang)Chemical Additives Gmbh,Liaoyang 111000,Liaoning,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2022年第4期844-852,共9页
Fine Chemicals
基金
辽宁省教育厅青年基金(LQGD2020019)。
关键词
混凝土
阻锈剂
电化学
钢筋腐蚀
咪唑啉
建筑用化学品
concrete
rust inhibitor
electrochemistry
steel bar corrosion
imidazoline
building chemicals
