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| Study on inhibition mechanism of a new kind of corrosion inhibitor of phosphine-methyl-acidamide used in oil-field sewage |
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SHANG Hong-tao,FAN Wei-yu,NAN Guo-zhi,Li Shui-ping
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(College cf Chemistry and Chemical Engineering in China Unwersily of Petroleum,Dottgying 257061 r Shandong Province, China)
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| Abstract: |
| By using the polarization experiment, static weight loss experiment and Auger electron spectrum, the elecbnchera-ical and adsorption inhibition mechanism of a new kind of corrosion inhibitor of phosphine-methyl-acidamide used in oil-field sewage was studied. The electrochemical experiment results manife&t lhal the product is a mixed-type corrosion inhibitor. The adsorption thermodynamics experiment makes clear lhat the product is an adsorptive^type corrosion inhibitor and the corrosion daia are fitted to EL-Awady adsorption isotherm. The results show that the corrosion inhibition effect of phosphine-methyl-aci-damide is much better than lhat of corrosion inliibitor of acidamide and tetrdiydroglyoxaline. |
| Key words: corrosion inhibitor adsorption isotherm Auger electron spectrum} inhibition roechanisni |
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