耐高温盐酸酸化缓蚀剂的研制及其缓蚀行为  

Development of High-Temperature Hydrochloric Acid Corrosion Inhibitor and Its Inhibition Behavior

作　　者：柳杰 高强 王紫旋 艾俊哲[1] LIU Jie;GAO Qiang;WANG Zixuan;AI Junzhe(School of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,China)

机构地区：[1]长江大学化学与环境工程学院,荆州434023

出　　处：《腐蚀与防护》2024年第7期29-35,共7页Corrosion & Protection

摘　　要：以3-甲基喹啉、氯化苄为原料合成了一种喹啉季铵盐缓蚀剂,采用正交试验法优化了合成条件;并将其作为主剂,复配增效剂、分散剂等,研制了耐高温(180℃)盐酸酸化缓蚀剂GWS-G,评价了其缓蚀性能,并用电化学测试、SEM-EDS、XPS分析等研究了其缓蚀行为。结果表明:在添加5.0%(质量分数)缓蚀剂GWS-G的20%(质量分数)盐酸中,180℃腐蚀4h后N80钢的腐蚀速率为70.25g/(m^(2)·h),满足行业标准要求。缓蚀剂GWS-G是以抑制阴极为主的混合型缓蚀剂,通过在N80钢表面形成均匀完整的保护膜抑制腐蚀,且随着缓蚀剂含量的增大保护能力增强;XPS分析表明保护膜主要以缓蚀剂膜为主,包含了FeOOH、Fe_(2)O_(3)、FeCl_(2)等腐蚀产物。A quinoline quaternary ammonium salt corrosion inhibitor was synthesized using 3-methylquinoline and benzyl chloride as raw materials,and the synthesis conditions were optimized using the orthogonal experimental method.And it was used as the main agent;compounded with enhancers,dispersants,etc.A high-temperature(180℃)hydrochloric acid acidification corrosion inhibitor,GWS-G,was developed.Its corrosion inhibition performance was evaluated,and its corrosion inhibition behavior was studied using electrochemical testing,SEM-EDS,XPS analysis,etc.The results show that the corrosion rate of N80 steel after 4 hours of corrosion at 180℃in 20%hydrochloric acid with 5.0%corrosion inhibitor GWS-G was 70.25 g/(m^(2)·h),which met the industry standard requirements.The corrosion inhibitor GWS-G was a mixed-type corrosion inhibitor mainly used to suppress cathodes.It formed a uniform and complete protective film on the surface of N80 steel to suppress corrosion,and the protective ability increased with the increase in inhibitor concentration.XPS analysis results show that the protective film was mainly composed of corrosion inhibitor film,which included corrosion products such as FeOOH,Fe_(2)O_(3),FeCl_(2),etc.

关 键 词：高温酸化 缓蚀剂 喹啉季铵盐 电化学测试 缓蚀性能 

分 类 号：TG174[金属学及工艺—金属表面处理]