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以4-甲基吡啶、氯甲基萘为原料,合成了一种新型的吡啶季铵盐。合成的吡啶季铵盐在碳钢表面的吸附满足Flory-Huggins等温式,平均每个吡啶季铵盐分子通过取代1.45个水分子而在碳钢电极表面形成单分子吸附层。交流阻抗谱等效电路中的膜电阻与电荷传递电阻均随吡啶季铵盐浓度的增加而增大。合成的吡啶季铵盐吸附动力学行为满足Arrhenius方程,吡啶季铵盐的吸附不仅增加了腐蚀反应的活化能而且还降低了腐蚀反应的指前因子。将合成的吡啶季铵盐与丙炔醇复配后,可以用于160℃浓盐酸或土酸的酸化施工。
A novel pyridine quaternary ammonium salt was synthesized from 4-methylpyridine and chloromethyl naphthalene. The adsorption of the synthesized pyridine quaternary ammonium salt on the surface of carbon steel satisfies the Flory-Huggins isothermal equation. On average, each quaternary ammonium salt molecule forms a monomolecular layer on the surface of the carbon steel electrode by replacing 1.45 water molecules. The membrane resistance and charge transfer resistance in AC impedance spectroscopy equivalent circuit both increase with the increase of pyridine quaternary ammonium salt concentration. The adsorption kinetics of the synthesized quaternary ammonium salts satisfy the Arrhenius equation. The adsorption of pyridine quaternary ammonium salt not only increases the activation energy of the corrosion reaction but also reduces the pre-exponential factor of the corrosion reaction. The synthetic pyridine quaternary ammonium salt with propargyl alcohol compound, can be used for 160 ℃ concentrated hydrochloric acid or acid acidification construction.