Nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor and preparation method thereof

The invention discloses a nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor and a preparation method thereof. The nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor comprises the following components in percentage by weight: component 1, propargyl alcohol, formaldehyde, urotropine, potassium iodide, antimonous oxide, antimony butter, surfactant and solvent in the ratio of (1-50) : (0-25) : (1-25) : (0-10) :(0-10) : (0-20) : (6-25) : (15-70), wherein the component 1 is selected from one or more of chlorinated N-benzyl-R-pyridine quaternary ammonium salt or chlorinated N-benzyl-R-quinoline quaternary ammonium salt. The nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor has the advantages of small addition amount, low cost, stable and uniform dispersion in acidic liquid, low corrosion speed, capability of resisting high temperature of over 160 DEG C and excellent performance. 0.5-2.5 percent of nitrogenous heterocyclic quaternary ammonium salt acidizing corrosion inhibitor disclosed by the invention is added into the acidic liquid, so that the corrosion speed is far lower than national primary standard.