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Your search keyword '"Hongcheng Liu"' showing total 4 results
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4 results on '"Hongcheng Liu"'

1. The synergistic inhibition between hexadecyl trimethyl ammonium bromide (HTAB) and NaBr for the corrosion of cold rolled steel in 0.5 M sulfuric acid

Author

Hongcheng Liu, Guangheng Liu, Xueming Li, Guannan Mu, Lin Li, Libin Tang, and Yunsen Si

Subjects
Ammonium bromide, Mechanical Engineering, Inorganic chemistry, Langmuir adsorption model, Sulfuric acid, Corrosion, Metal, symbols.namesake, chemistry.chemical_compound, Adsorption, chemistry, Mechanics of Materials, Bromide, visual_art, symbols, visual_art.visual_art_medium, General Materials Science, Polarization (electrochemistry)
Abstract

The synergistic effect of the mixture of hexadecyl trimethyl ammonium bromide (HTAB) and various concentrations of NaBr on the corrosion of cold rolled steel in 0.5 M sulfuric acid has been investigated using weight loss method and polarization method. The results reveal that the corrosion of cold rolled steel has been efficiently inhibited by HTAB in the presence of NaBr in sulfuric acid, and inhibition efficiency increases with increasing concentration of NaBr at the same temperature. A synergistic effect has been observed for HTAB with NaBr at every experimental temperature. The polarization curves show that the complex of HTAB and NaBr is a mixed-type inhibitor. The experimental results suggest that the presence of bromide ion in the solution stabilizes the adsorption of HTAB molecules on the metal surface and improves the inhibition efficiency of HTAB. Langmuir adsorption isotherm equation was obeyed at all the temperatures studied. The synergism parameters have been calculated and discussed. The results obtained from weight loss method and polarization method are in good agreement.

Published
2006

2. Effect of NaBr on the corrosion of cold rolled steel in 1.0 M phosphoric acid

Author

Guannan Mu, Xueming Li, Libin Tang, Guangheng Liu, and Hongcheng Liu

Subjects
Materials science, Mechanical Engineering, Inorganic chemistry, Metallurgy, technology, industry, and agriculture, Langmuir adsorption model, Activation energy, Kinetic energy, Corrosion, Ion, chemistry.chemical_compound, symbols.namesake, Adsorption, chemistry, Mechanics of Materials, Bromide, symbols, General Materials Science, Phosphoric acid
Abstract

The inhibition of NaBr on the corrosion of cold rolled steel in 1.0 M phosphoric acid was studied by using weight loss method and polarization method. It was found that the adsorption of bromide ion can prevent steel from corrosion and the adsorption follows the Langmuir adsorption isotherm. Polarization studies showed that NaBr is a mixed-type inhibitor for steel corrosion in 1.0 M phosphoric acid. Thermodynamic parameters such as adsorption heat, adsorption entropy and adsorption free energy were obtained from the experimental data of temperature studies for the inhibition process at four temperatures ranging from 30 to 45°C. The kinetic data such as apparent activation energies and pre-exponential factors at different concentrations of the inhibitor were calculated, and the effects of the apparent activation energy and pre-exponential factor on the corrosion rate of cold rolled steel were discussed. The inhibitive action was satisfactorily explained by using thermodynamic and kinetic models. The results obtained from polarization experiment were in good agreement with those obtained from weight loss measurement.

Published
2006

3. The synergistic inhibition between hexadecyl trimethyl ammonium bromide (HTAB) and NaBr for the corrosion of cold rolled steel in 0.5 M sulfuric acid.

Author

Libin Tang, Xueming Li, Guannan Mu, Guangheng Liu, Lin Li, Hongcheng Liu, and Yunsen Si

Subjects
CORROSION & anti-corrosives, SURFACE active agents, SURFACES (Technology), MATERIALS science, CHEMICAL inhibitors
Abstract

The synergistic effect of the mixture of hexadecyl trimethyl ammonium bromide (HTAB) and various concentrations of NaBr on the corrosion of cold rolled steel in 0.5 M sulfuric acid has been investigated using weight loss method and polarization method. The results reveal that the corrosion of cold rolled steel has been efficiently inhibited by HTAB in the presence of NaBr in sulfuric acid, and inhibition efficiency increases with increasing concentration of NaBr at the same temperature. A synergistic effect has been observed for HTAB with NaBr at every experimental temperature. The polarization curves show that the complex of HTAB and NaBr is a mixed-type inhibitor. The experimental results suggest that the presence of bromide ion in the solution stabilizes the adsorption of HTAB molecules on the metal surface and improves the inhibition efficiency of HTAB. Langmuir adsorption isotherm equation was obeyed at all the temperatures studied. The synergism parameters have been calculated and discussed. The results obtained from weight loss method and polarization method are in good agreement. [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
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4. Effect of NaBr on the corrosion of cold rolled steel in 1.0 M phosphoric acid.

Author

Libin Tang, Xueming Li, Hongcheng Liu, Guannan Mu, and Guangheng Liu

Subjects
STEEL, PHOSPHORIC acid, CORROSION & anti-corrosives, ADSORPTION (Chemistry), SEPARATION (Technology), THERMODYNAMICS
Abstract

The inhibition of NaBr on the corrosion of cold rolled steel in 1.0 M phosphoric acid was studied by using weight loss method and polarization method. It was found that the adsorption of bromide ion can prevent steel from corrosion and the adsorption follows the Langmuir adsorption isotherm. Polarization studies showed that NaBr is a mixed-type inhibitor for steel corrosion in 1.0 M phosphoric acid. Thermodynamic parameters such as adsorption heat, adsorption entropy and adsorption free energy were obtained from the experimental data of temperature studies for the inhibition process at four temperatures ranging from 30 to 45°C. The kinetic data such as apparent activation energies and pre-exponential factors at different concentrations of the inhibitor were calculated, and the effects of the apparent activation energy and pre-exponential factor on the corrosion rate of cold rolled steel were discussed. The inhibitive action was satisfactorily explained by using thermodynamic and kinetic models. The results obtained from polarization experiment were in good agreement with those obtained from weight loss measurement. [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
View/download PDF

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