Oil Soluble Mannich Base Corrosion Inhibitor for Corrosion Inhibition of Copper in Transformer Oil
An oil-soluble Mannich base corrosion inhibitor(OMB)was synthesized from formalde-hyde,dodecylamine and acetone,and which then was characterized by Fourier transform infrared spec-troscopy(FT-IR).The corrosion inhibition effect of OMB and barium petroleum sulfonate(T701)on cop-per in 25# transformer oil was comparatively assessed by means of salt spray test,scanning electron mi-croscopy(SEM)and atomic force microscopy(AFM)and X-ray photoelectron spectroscopy(XPS).Ac-cording to the quantum chemical calculation(Gaussian 09),molecular dynamics simulation(M-S)and Langmuir isothermal adsorption equation,the corrosion inhibition mechanism of OMB on copper was fur-ther discussed.The results show that OMB is a corrosion inhibitor with excellent corrosion inhibition ef-fect on copper in salt spray test.The adsorption behavior of OMB on copper surface is spontaneous ad-sorption,which accords with mixed adsorption law and is mainly chemical adsorption,and the OMB mo-leculars are adsorbed parallel to the surface of copper.
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