曼尼希碱季铵盐J-01的合成及其对P110钢的缓蚀性能研究

发布时间：2018-02-26 07:01

  本文关键词： 曼尼希碱季铵盐 缓蚀剂 电化学 吸附 缓蚀性能　出处：《材料导报》2015年S2期 　论文类型：期刊论文

【摘要】：为探讨高温浓酸下曼尼希碱类缓蚀剂对油套管钢的腐蚀行为,以甲醛、苯乙酮、苯甲胺、氯化苄为原料,通过正交试验法优选合成一种曼尼希碱季铵盐缓蚀剂J-01。采用红外光谱对合成物进行结构表征,利用静态失重法、电化学法研究了其在20%盐酸腐蚀环境下对P110钢的缓蚀性能及吸附行为,并结合扫描电子显微镜测定了其在P110钢表面的腐蚀形貌特征。结果表明:当n(氯化苄)∶n(曼尼希碱中间体)=0.8∶1,反应温度为110℃,反应时间为6h时,J-01具有最好的缓蚀性能;在模拟油田腐蚀环境下,曼尼希碱季铵盐浓度、温度、盐酸含量对P110钢缓蚀性能影响显著,在20%盐酸中,腐蚀温度为130℃,缓蚀剂加量为0.5%时,缓蚀效率仍达到90%以上;曼尼希碱季铵盐属于混合型缓蚀剂,缓蚀机理主要来自曼尼希碱季铵盐分子在金属表面的吸附成膜;该缓蚀剂可在金属表面形成均匀致密的保护膜,随缓蚀剂浓度的提高,缓蚀性能增强。
[Abstract]:In order to study the corrosion behavior of mannitine corrosion inhibitor on oil casing steel under high temperature concentrated acid, formaldehyde, acetophenone, benzyl chloride and benzyl chloride were used as raw materials. An inhibitor J-01of mannitine quaternary ammonium salt was synthesized by orthogonal test. The structure of the compound was characterized by infrared spectroscopy, and the structure was characterized by static weightlessness method. The corrosion inhibition and adsorption behavior of P110 steel under 20% hydrochloric acid corrosion environment were studied by electrochemical method. The corrosion morphology of P110 steel was determined by scanning electron microscope. The results showed that when n (benzyl chloride = 0.8: 1, reaction temperature 110 鈩，

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