Page 208 - 《精细化工》2022年第4期
P. 208
第 39 卷第 4 期 精 细 化 工 Vol.39, No.4
2022 年 4 月 FINE CHEMICALS Apr. 2022
建筑用化学品
乙氧基化咪唑啉阻锈剂的制备及性能
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杨振声 ,杨 健 ,张晓娟 ,王 冰
〔1. 沈阳工业大学 石油化工学院,辽宁 辽阳 111000;2. 赢创天大(辽阳)化学助剂有限公司,辽宁 辽
阳 111000〕
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。
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
中图分类号:TG174.42 文献标识码:A 文章编号:1003-5214 (2022) 04-0844-09
Preparation and performance of ethoxylated imidazoline rust inhibitor
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YANG Zhensheng , YANG Jian , ZHANG Xiaojuan , WANG Bing
[1. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111000, Liaoning, China;
2. Evonik Big (Liaoyang) Chemical Additives Gmbh, Liaoyang 111000, Liaoning, China]
Abstract: 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.
Key words: concrete; rust inhibitor; electrochemistry; steel bar corrosion; imidazoline; building chemicals
随着国内沿海地区大型工程的兴建,每年因钢 国每年的腐蚀总成本估计为 2127.80 亿元,相当于
[4]
筋腐蚀造成的经济损失越来越大,钢筋过早腐蚀不 GDP 的 3.34% ,有研究结果表明,美国每年估计
仅给国民经济造成严重损害,对人民群众的生命财 的腐蚀直接成本总额为 2760 亿美元,相当于美国
[5]
产安全也是重大的隐患 [1-2] 。目前,全球腐蚀成本估 GDP 的 3.1% 。就美国桥梁的腐蚀情况来看,美国
[3]
计为 2.5 万亿美元,相当于全球 GDP 的 3.4% 。中 每 60 万座桥中,有 40%的桥梁因为钢筋腐蚀承载能
收稿日期:2021-11-16; 定用日期:2022-01-17; DOI: 10.13550/j.jxhg.20211162
基金项目:辽宁省教育厅青年基金(LQGD2020019)
作者简介:杨振声(1985—),男,讲师,博士生,E-mail:1044945@qq.com。联系人:张晓娟(1965—),女,教授,E-mail:
1664392140@qq.com。