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The Study of Inhibitive Capability and Behavior of Compound Inhibitor in High Temperature Seawater

Zou Jia

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Abstract

Weight loss,electrochemical methods and Scanning Electron Microscope(SEM) were applied to investigate the inhibitive capability and behavior of self-made compound inhibitor(nonylphenylethoxy phosphate ester,polyphosphate,HEDP,ZnSO4,CaGL) for G105 steel in seawater at high temperature.The results showed that the inhibitive efficiency reached 98.1% at 70 ℃ and 95.2% at 90 ℃ with 150 mg/L compound inhibitor,respectively.The compound inhibitor was an effective anodic-type inhibitor.The inhibitor film forming process on the electrode surface showed three different stages with time: the inhibitor film grown up,the compact film existed and sustained,the film decayed.

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What this paper is about

Weight loss,electrochemical methods and Scanning Electron Microscope(SEM) were applied to investigate the inhibitive capability and behavior of self-made compound inhibitor(nonylphenylethoxy phosphate ester,polyphosphate,HEDP,ZnSO4,CaGL) for G105 steel in seawater at high temperature.The results showed that the inhibitive efficiency reached 98.1% at 70 ℃ and 95.2% at 90 ℃ with 150 mg/L compound inhibitor,respectively.The compound inhibitor was an effective anodic-type inhibitor.The inhibitor film forming process on the electrode surface showed three different stages with time: the inhibitor film grown up,the compact film existed and sustained,the film decayed.

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Available abstract

Weight loss,electrochemical methods and Scanning Electron Microscope(SEM) were applied to investigate the inhibitive capability and behavior of self-made compound inhibitor(nonylphenylethoxy phosphate ester,polyphosphate,HEDP,ZnSO4,CaGL) for G105 steel in seawater at high temperature.The results showed that the inhibitive efficiency reached 98.1% at 70 ℃ and 95.2% at 90 ℃ with 150 mg/L compound inhibitor,respectively.The compound inhibitor was an effective anodic-type inhibitor.The inhibitor film forming process on the electrode surface showed three different stages with time: the inhibitor film grown up,the compact film existed and sustained,the film decayed.

Key concepts: Scanning electron microscope, Polyphosphate, Seawater, Electrochemistry, Materials science, Phosphate, Electrode, Nuclear chemistry

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