文章摘要
适用于H2S、CO2、Cl- 较高浓度环境下的咪唑啉衍生物 缓蚀剂的制备与性能评价*
Preparation and Performance Evaluation of Imidazoline Derivative Corrosion Inhibitor Using on theEnvironment with High Content of H2S,CO2 and Cl
  
DOI:10.19346/j.cnki.1000-4092.2020.02.024
中文关键词: 油气井  硫化氢  二氧化碳  氯离子  腐蚀  缓蚀剂  咪唑啉
英文关键词: oil and gas well  hydrogen sulfide(H2S)  carbon dioxide(CO2)  chloridion(Cl- )  corrosion  inhibitor  imidazoline
基金项目:
作者单位
赵海洋,石 鑫,曾文广,刘冬梅,魏晓静 (中石化西北油田分公司新疆 乌鲁木齐 830011) 
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中文摘要:
      针对高含CO2、H2S、Cl- 的油气井环境,以十六烷酸、二乙烯三胺、1-萘基-2-硫脲为原料制备了1-( 2-奈基-硫 脲乙基)-2-十五烷基-咪唑啉缓蚀剂。在饱和CO2浓度、H2S质量浓度为30 mg/L、Cl- 质量分数为0~30%的盐溶 液中,研究了缓蚀剂对钢片腐蚀形貌和缓蚀效果的影响,通过电化学极化曲线和交流阻抗谱分析了缓蚀机理。 结果表明,Cl- 加速了碳钢在CO2/H2S介质中的腐蚀。在含CO2(饱和)、H2S(30 mg/L)和Cl-(10%)的盐溶液中,缓 蚀剂可减缓Cl- 对碳钢的腐蚀。缓蚀剂的缓蚀效果随着Cl- 浓度的增加而下降,Cl- 含量低于20%时的缓蚀效果较 好。随着缓蚀剂浓度的升高,缓蚀率增大并逐渐趋于稳定,缓蚀剂加量为100 mg/L时的缓蚀率为94.36%。该缓 蚀剂属于对阴阳极作用均有抑制的混合型缓蚀剂,可在碳钢表面形成一层致密的保护膜,阻碍腐蚀介质与金属 基体的接触,抑制金属的腐蚀,可用于CO2、H2S、Cl- 浓度较高环境下管道的缓蚀。图10参13
英文摘要:
      Aiming at the oil and gas well environment with high content of CO2,H2S and Cl-,1-(2-naphthyl- thioureaethyl)- 2-pentadecyl-imidazoline corrosion inhibitor was prepared from hexadecanoic acid,diethylenetriamine and 1-naphthyl-2-thiourea. In the salt solution with saturated concentration of CO2,H2S mass concentration of 30 mg/L and Cl- mass fraction of 0—30%,the effect of corrosion inhibitor on the corrosion morphology and corrosion inhibition effect of the steel sheet was studied. The corrosion inhibition mechanism was analyzed through electrochemical polarization curves and AC impedance spectroscopy. The results showed that Cl- accelerated the corrosion of carbon steel in CO2/H2S medium. In the salt solution containing saturated CO2,30 mg/L H2S and 10% Cl-,the corrosion inhibitor could slow down the corrosion of carbon steel by Cl- . The inhibition effect of corrosion inhibitor decreased with increasing Cl- concentration. When the Cl- content was less than 20%,the inhibition effect was better. As the concentration of corrosion inhibitor increased,the corrosion inhibition rate increased and gradually stabilized. When the amount of corrosion inhibitor was 100 mg/L,the corrosion inhibition rate was 94.36% . The corrosion inhibitor was a mixed corrosion inhibitor that could inhibit the action of cathode and anode. It could form a dense protective film on the surface of carbon steel, hinder the contact between corrosion medium and metal matrix,and inhibit the corrosion of metal. The corrosion inhibitor could be used for the corrosion inhibition of pipelines with high content of CO2,H2S and Cl-.
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