Inhibition of [NH2Et2][(4-MeC6H4O)2PS2] for Carbon Steel in Hydrochloric Acid Solution

Zhen Xiang; Xue Yang; Bin Xie; Li Ke Zou; Yang Guang Xiang; Chuan Lai

doi:10.4028/www.scientific.net/AMR.239-242.716

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Research Progress on Preparation of Hierarchical Porous Oxides Derived from Wood Templates
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Inhibition of [NH₂Et₂][(4-MeC₆H₄O)₂PS₂] for Carbon Steel in Hydrochloric Acid Solution
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 239-242Inhibition of [NH2Et2][(4-MeC6H4O)2PS2] for Carbon...

Inhibition of [NH₂Et₂][(4-MeC₆H₄O)₂PS₂] for Carbon Steel in Hydrochloric Acid Solution

Abstract:

The inhibition effect of N,N-diethylammonium O,O'-di(4-Methylpheny)dithiophosphate (NOPP, [NH₂Et₂][(4-MeC₆H₄O)₂PS₂])against the corrosion of carbon steel in HCl solution was studied by weight loss measurements, electrochemical measurements, AFM and SEM techniques. The studies of weight loss measurements indicate that the NOPP acts as a good inhibitor for the corrosion of carbon steel in HCl solution. Polarization curves indicate NOPP is a mixed-type inhibitor. The adsorption of NOPP on carbon steel surface obeys the Langmuir isotherm, and the obtained standard free energy of adsorption suggests that the chemisorption takes place spontaneously.