丙二胺型双曼尼希碱酸化缓蚀剂的缓蚀性能
Corrosion Inhibition Properties of Propylenediamine-Type Double Mannich Base Acidizing Corrosion Inhibitor
摘 要
将1,2-丙二胺和1,3-丙二胺分别与多聚甲醛和苯乙酮反应,制备出1,2-丙二胺型双曼尼希碱(BTM-2)和1,3-丙二胺型双曼尼希碱(BTM-3)两种缓蚀剂。采用常压静态挂片失重试验和电化学测试,分析了缓蚀剂添加量对15% HCl溶液中N80钢缓蚀效果的影响,并采用量子计算方法,进一步探讨了其缓蚀机理。结果表明:BTM-2和BTM-3均具有明显的缓蚀效果,BTM-2的缓蚀效果优于BTM-3的;BTM-2与BTM-3缓蚀剂分子均在N80钢表面产生了物理吸附和化学吸附的组合吸附作用,形成了一层吸附膜,其吸附作用符合Langmuir吸附等温模型,量子化学计算结果与试验结果一致。
1,3-丙二胺
双曼尼希碱
缓蚀效果
吸附作用
1,2-propanediamine
1,3-propanediamine
double Mannich base
corrosion inhibition effect
adsorption
Abstract
The 1,2-propanediamine and 1,3-propanediamine were reacted with paraformaldehyde and acetophenone, respectively, two corrosion inhibitors 1,2-propanediamine type double Mannich base (BTM-2) and 1,3-propanediamine type double Mannich base (BTM-3) were prepared. The influence of the addition amount of corrosion inhibitor on the corrosion inhibition effect of N80 steel in 15% HCl solution was analyzed by atmospheric pressure static coupon weight loss test and electrochemical test. And the quantum chemical calculation method was used to futher discuss the corrosion inhibition mechanism. The results showed that both BTM-2 and BTM-3 had obvious corrosion inhibition effect, and the corrosion inhibition effect of BTM-2 was better than that of BTM-3. BTM-2 and BTM-3 corrosion inhibitor molecules all produced combined adsorption of physical adsorption and chemical adsorption on the surface of N80 steel, forming a layer of adsorption film, its adsorption conformed to the Langmuir adsorption isotherm model. The quantum chemical calculation result was consistent with experimental result.
中图分类号 TG174.42 DOI 10.11973/fsyfh-202206005
所属栏目 试验研究
基金项目
收稿日期 2020/7/31
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引用该论文: ZHANG Meng,LI Qing,ZHANG Kun,GE Yuhang,ZHANG Xiaoyun. Corrosion Inhibition Properties of Propylenediamine-Type Double Mannich Base Acidizing Corrosion Inhibitor[J]. Corrosion & Protection, 2022, 43(6): 26
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