地沟油制备水溶性咪唑啉缓蚀剂及其缓蚀性能研究
Preparation Of Water-Soluble Imidazoline Corrosion Inhibitor from Gutter Oil and its Corrosion Inhibition Performance Study
覃金萍 1李文婷1
作者信息
- 1. 广西工业技师学院,广西南宁 530031
- 折叠
摘要
以地沟油、二乙烯三胺为原料制备咪唑啉缓蚀剂,当地沟油与二乙烯三胺摩尔比为1:1.2,环化温度为140℃,时间为3 h,酰胺化温度为150～160℃,时间为2 h,季铵化温度为140℃,反应时间为3～4 h,可合成水溶性咪唑啉缓蚀剂.通过静态挂片失重法和电化学极化法对其缓蚀效果进行评价,结果表明,在1 mol/L的盐酸介质中,当缓蚀剂添加量浓度为100 mg/L时,缓蚀性能最好.存放1 d的缓蚀剂缓蚀效率可高达99.02%.存放6个月后的缓蚀剂缓蚀效率下降为95.76%,仍能很好地满足工业要求.电化学极化曲线可以看出此法制备的咪唑啉缓蚀剂为阴极型缓蚀剂.
Abstract
An imidazoline corrosion inhibitor was prepared using gutter oil and diethylenetriamine as raw materials.When the molar ratio of gutter oil to diethylenetriamine is 1:1.2,the cyclization temperature is 140℃,the time is 3 hours,the amidation temperature is 150～160℃,the time is 2 hours,the quaternization temperature is 140℃,and the reaction time is 3-4 hours,a water-soluble imidazoline corrosion inhibitor can be synthesized.The corrosion inhibition effect was evaluated by static coupon weight loss method and electrochemical polarization method.The results showed that in 1 mol/L hydrochloric acid medium,the best corrosion inhibition performance was achieved when the concentration of the inhibitor was 100 mg/L.The corrosion inhibition efficiency of the corrosion inhibitor stored for one day can reach up to 99.02%.After 6 months of storage,the corrosion inhibition efficiency of the corrosion inhibitor decreased to 95.76%,which still meets industrial requirements well.The electrochemical polarization curve shows that the imidazoline corrosion inhibitor prepared by this method is a cathode type corrosion inhibitor.
关键词
地沟油/咪唑啉/缓蚀剂/腐蚀Key words
gutter oil/Imidazoline/corrosion inhibitors/corrosion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据