Effect of Nanocomposite Additives on Corrosion Inhibition of Zn Anode in Neutral Solution

Abstract:

Effects of hexadecyl trimethyl ammonium bromide (CTAB), polyethylene glycol nanowire (NPEG) and their nanocomposite additives on corrosion inhibition of Zn in 1 mol/L ZnSO4 solution were investigated by weight-loss measurements, electrochemical tests，scanning electron microscopy and battery discharge tests. The results show that the inhibition efficiency of nanocomposite additives is 70%, which is much higher than individual inhibitors of CTAB or NPEG alone, because of the notable synergistic effect between CTAB and NPEG. While CTAB can cause a negative shift of corrosion potential of zinc, NPEG can form a very thick hydrophobic layer on the surface of zinc electrode by adsorption. Furthermore, NPEG can render part of CTAB cations to form large micelle particles along the NPEG macromolecular chains and cross-link with NPEG, and thus greatly enhance the blocking effect of the hydrophobic layer. Therefore，the corrosion inhibition efficiency of the composite additives is much higher. The battery containing 0.05% CTAB and 0.05% NPEG performs better than the batteries with individual additives, especially at high discharge current rate.

• Periodical: Materials Science Forum (Volume 722)
• Pages: 17-24
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.722.17
• Online since: June 2012
• Authors: Hong Fei Li, Bao Hua Li, Cheng Jun Xu, Chun Guang Wei, Fei Yu Kang
• Keywords: Corrosion Inhibition, Nanocomposite Additives, Synergistic Effect, Zinc, Zinc Ion Battery

References

[1] D. Linden, T.B. Reddy, Handbook of Batteries, New York, McGraw-Hill, 2002.

[2] C. Xu, B. Li, H. Du, F. Kang, Energetic zinc ion chemistry: The rechargeable zinc ion battery, Angew. Chem. Int. Ed. 51(2012) 933–935.

DOI: 10.1002/anie.201106307

[3] C. Xu, Design of Asymmetric Supercapacitor and Synthesis of Manganese Dioxide Electrode Material, Tsinghua University Ph.D. Thesis, 2009.

[4] C. Tzipi, Z. Yuli, E.E. Yair, In situ STM studies of zinc in aqueous solutions containing PEG DiAcid inhibitor: Correlation with electrochemical performances of zinc–air fuel cells, J. Power Sources. 157 (2006) 584-591.

DOI: 10.1016/j.jpowsour.2005.07.090

[5] A.K. Singh, M.A. Quraishi, Adsorption properties and inhibition of mild steel corrosion in hydrochloric acid solution by ceftobiprole, J. Appl. Electrochem. 41 (2011) 7-18.

DOI: 10.1007/s10800-010-0202-y

[6] K. Aramaki, Effects of organic inhibitors on corrosion of zinc in an aerated 0.5M NaCl solution, Corros. Sci. 43 (2001) 1985-2000.

DOI: 10.1016/s0010-938x(00)00174-8

[7] H. Zhou, Q. Huang, M. Liang, et al., Investigation on synergism of nanocomposite additives for zinc corrosion inhibition in alkaline solution, Materials Chemistry and Physics. 128 (2011) 214–219.

DOI: 10.1016/j.matchemphys.2011.02.061

[8] W. Chi, Z. Yang, S. Wang, et al., Influence on performance of sealed Ni-Zn battery by adding different organic additives, Chinese Journal of Power Sources. 34 (2010) 171-173.

[9] K. Holmberg, B. Jonsson, B. Kronberg, et al., Surfactants and Polymers in Aqueous Solution (Second Edition), Beijing, Chemical Industry Press, 2005.