Corrosion inhibition behavior of dithiocarbamate modified vanillin on copper in sodium chloride solution
In view of the corrosion characteristics of copper in NaCl solution,DTCV(dithiocarbamate modified vanillin)was synthesized from carbon disulfide,ethylenediamine and vanillin.The anti-corrosion performance of DTCV on copper in mass fraction 3％NaCl solution was evaluated by electrochemical methods,SEM(scanning electron microscopy)and EDS(energy dispersive spectroscopy),and its adsorption behavior on the copper surface was discussed.The results show that DTCV simultaneously suppresses the anodic and cathodic reaction processes of the copper electrode.When 0.30 mmol/L DTCV is added,the corrosion inhibition efficiency can reach up to 98.34％.The adsorption of DTCV is chemisorption,which conforms to the Langmuir adsorption isothermal model.DTCV can be considered as an excellent corrosion inhibitor for copper in NaCl medium.
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