Rerearch Of Pyridine Complex Inhibitors

This article through carried on quaternizing to respond with the benzyl chloride to morpholine, N-methyl pyridine, pyridine,4-methyl pyridine and other chemical compounds, separately that carried on the inhibition effect appraisal to the quaternary ammonium salt, finally selected the pyridine as the raw material of corrosion inhibiter development and synthesized the intermediary product2-aminopyridine, Had determined the best synthesis conditions of2-aminopyridine through the orthogonal test and determined its chemical constitution through the melting point test and infrared spectrum.Screened the alpha,alpha’-dichloro-p-xylene as the quaternizing reagent from other reagents like benzyl chloride, epichlorohydrine, alpha,alpha’-dichloro-p-xylene, and synthesized corrosion inhibiter single dose HBS-1. Has appraised the ratio of reactants, reaction temperature, reaction time, pH and other factor’s the effects on static corrosion rate and HBS-1inhibitor resistance to temperature, anti-concentration of hydrochloric acid properties. Has designed the HBS-1optimum reaction condition through the orthogonal test: Material allocated proportions between2-aminopyridines and benzyl chloride is1:4, reaction temperature is100℃, reaction time of8hours, the reaction pH is8.5. In0.5%corrosion inhibiter that under this condition synthesizes,60℃water and10%hydrochloric acid solution the measured static corrosion rate is0.712g.m-2h-1.Screened A-7as the dispersing agent of HBS-1, optimized the corrosion inhibiter formula on the base of complex orthogonal experiment, finally obtained pyridine complex corrosion inhibiter HBS-2in this paper. The HBS-2corrosion inhibiter formula is:0.2%HBS-1+0.2%A-7+0.4%organic amine+0.075%alkynols-2.New type of pyridine complex inhibitor HBS-2is a more economical adapt to high temperatures, low concentrations of efficient corrosion inhibitor, in hydrochloric acid concentration of less than20%,90℃environment to achieve the same inhibition effect is more economical than the commercial "Acidification1"corrosion; and in the1:1mixed acid at low concentrations (5%hydrochloric acid5%nitric acid) solution, HBS-2shows better superiority than the commercial" Lan-826"inhibitor.