摘要
海上完井液具有成分复杂、矿化度高等特点,针对完井液对井下管道腐蚀严重的问题,以天然多糖壳聚糖(CS)为原料,合成了聚酰胺化壳聚糖(PACS),评估了其抑制碳钢腐蚀的效果。失重腐蚀实验结果表明,在80℃下向完井液中投加2000 mg/L PACS后,碳钢腐蚀速率由3.852 mm/a降至0.072 mm/a,缓蚀率为98.13%。此外,电化学测试(动电位极化和奈奎斯特曲线)结果也表明,当PACS投加量达到2000 mg/L,缓蚀率为90%以上,PACS具有良好的抑制碳钢腐蚀性能。
The offshore completion fluid has the characteristics of complex composition and high salinity.In order to solve the severe corrosion of underground pipelines causing by completion fluid.In this paper,a polyamide chitosan(PACS)was synthesized from the natural polysaccharide chitosan,and its corrosion inhibition performance on car⁃bon steel was investigated.The results of weight loss corrosion experiments showed that after adding 2000 mg/L polyamide chitosan to the completion fluid at 80℃,the corrosion rate of carbon steel decreased from 3.852 to 0.072 mm/a,and the corrosion inhibition percentage was 98.13%.In addition,electrochemical tests(potentiodynamic po⁃larization and Nyquist curve)also showed that when the concentration of PACS reached 2000 mg/L,the corrosion inhibition percentages was more than 90%.PACS shows good corrosion inhibition properties of carbon steel.
作者
郭晓轩
王昊龙
石大磊
马树奎
张忠亮
熊邦泰
刘旭
GUO Xiaoxuan;WANG Haolong;SHI Dalei;MA Shukui;ZHANG Zhongliang;XIONG Bangtai;LIU Xu(China Oilfield Services Co.,Ltd.,Tianjin 300456,China;CenerTech Tianjin Chemical Research&Design Institute Co.,Ltd.,Tianjin 300131,China)
出处
《工业水处理》
CSCD
北大核心
2024年第1期177-183,共7页
Industrial Water Treatment
关键词
完井液
壳聚糖
聚酰胺化
缓蚀剂
completion fluid
chitosan
polyamide
corrosion inhibitor
