DOI QR코드

DOI QR Code

Effects of Inhibitors on Corrosion Resistance of Steel in CaCl2 Solution Based on Response Surface Analysis

  • Received : 2021.06.15
  • Accepted : 2021.06.24
  • Published : 2021.06.30

Abstract

Effects of corrosion inhibitors (i.e., sodium nitrite, sodium hexametaphosphate, trimethylamine (TEA), sugar, and urea) on the corrosion resistance of carbon steel in CaCl2 solution were investigated. The test solution was designed with response surface methodology of design of experiments (DOE) in the range of 0 ~ 50 ppm for NaNO2, 0 ~ 200 ppm for (NaPO3)6, 0 ~ 2000 ppm for TEA, 0 ~ 3000 ppm for sugar, 0 ~ 200 ppm for urea with 3 wt% CaCl2. The corrosion potential and the corrosion rate were measured with potentiodynamic polarization tests and analyzed statistically to find main effects of inhibitor concentrations and interactions between them. As a result, hexametaphosphate was the most effective compound in reducing the corrosion rate. Sugar also reduced the corrosion rate significantly possibly because it covered the surface effectively with a high molecular weight. The inhibiting action of sugar was found to be enhanced by adding trimethylamine into the solution. Nevertheless, trimethylamine did not appear to be effective in inhibiting corrosion by itself. However, urea and sodium nitrite showed almost no inhibition on corrosion resistance of steel.

Keywords

Acknowledgement

This study was supported by research fund from Chosun University, 2019. We also acknowledge Korea Agency of Environment (KENA), Inc. for supplying the test materials.

References

  1. C. Andrade, M. Keddam, X. R. Novoa, M. C. Perez, C. M. Rangel, and H. Takenouti, Electrochemical behaviour of steel rebars in concrete: Influence of environmental factors and cement chemistry, Electrochimica Acta, 46, 3905 (2001). Doi: https://doi.org/10.1016/S0013-4686(01)00678-8
  2. A. Krolikowski and J. Kuziak, Impedance study on calcium nitrite as a penetrating corrosion inhibitor for steel in concrete, in Electrochimica Acta, 56, 7845 (2011). Doi: https://doi.org/10.1016/j.electacta.2011.01.069
  3. J. X. Xu, L. H. Jiang, W. L. Wang, L. Tang, and L. Cui, Effectiveness of inhibitors in increasing chloride threshold value for steel corrosion, Water Science and Engineering, 6, 354 (2013). Doi: https://doi.org/10.3882/ j.issn.1674-2370.2013.03.011
  4. D. E. Abd-El-Khalek and B. A. Abd-El-Nabey, Evaluation of sodium hexametaphosphate as scale and corrosion inhibitor in cooling water using electrochemical techniques, Desalination, 311, 227 (2013). Doi: https:// doi.org/10.1016/j.desal.2012.11.017
  5. V. S. Sastri, Green Corrosion Inhibitors: Theory and Practice (2011).
  6. M. A. Durivate, Practical Design of Experiments (DOE): A Guide for Optimizing Designs and Processes, Quality Press (2016).
  7. S. J. Park, S. M. Seo, Y. S. Yoo, H. W. Jeong, and H. Jang, Statistical Study of the Effects of the Composition on the Oxidation Resistance of Ni-Based Superalloys, Journal of Nanomaterials, 2015, article ID 929546 (2015). Doi: https://doi.org/10.1155/2015/929546
  8. S. J. Park, K. H. Lee, S. M. Seo, H. W. Jeong, Y. S. Yoo, and H. J. Jang, Statistics of oxidation resistance of Ni- (0-15)Co-(8-15)Cr-(0-5)Mo-(0-10)W-(3-8)Al-(0- 5)Ti-(0-10)Ta-0.1C-0.01B superalloys at 1000 ℃ by compositional variations, Rare Metals, 39, 918 (2020). Doi: https://doi.org/10.1007/s12598-018-1063-5
  9. V. S. Benitha, K. Jeyasubramanian, and G. S. Hikku, Investigation of anti-corrosion ability of nano mixed metal oxide pigment dispersed alkyd coating and its optimization for A36 steel, Journal of Alloys and Compounds, 721, 563 (2017). Doi: https://doi.org/10.1016/ j.jallcom.2017.05.329
  10. N. Etteyeb, L. Dhouibi, M. Sanchez, C. Alonso, C. Andrade, and E. Triki, Electrochemical study of corrosion inhibition of steel reinforcement in alkaline solutions containing phosphates based components, Journal of Materrials Science, 42, 4721 (2007). Doi: https:// doi.org/10.1007/s10853-006-0880-3
  11. P. Kwolek, A. Kaminski, K. Dychton, M. Drajewicz, and J. Sieniawski, The corrosion rate of aluminium in the orthophosphoric acid solutions in the presence of sodium molybdate, Corrosion Science, 106, 208 (2016). Doi: https://doi.org/10.1016/j.corsci.2016.02.005
  12. E. S. H. El Tamany, S. M. Elsaeed, H. Ashour, E. G. Zaki, and H. A. El Nagy, Novel acrylamide ionic liquids as anti-corrosion for X-65 steel dissolution in acid medium: Adsorption, hydrogen evolution and mechanism, Journal of Molecular Structure, 1168, 106 (2018). Doi: http:// 10.1016/j.molstruc.2018.05.035
  13. M. H. O. Ahmed, A. A. Al-Amiery, Y. K. Al-Majedy, A. A. H. Kadhum, A. B. Mohamad, and T. S. Gaaz, Synthesis and characterization of a novel organic corrosion inhibitor for mild steel in 1 M hydrochloric acid, Results in Physics, 8, 728 (2018). Doi: https://doi.org/10.1016/ j.rinp.2017.12.039
  14. G. Khan, K. M. S. Newaz, W. J. Basirun, H. B. M. Ali, F. L. Faraj, and G. M. Khan, Application of natural product extracts as green corrosion inhibitors for metals and alloys in acid pickling processes- A review, International Journal of Electrochemical Science, 10, 6120 (2015).
  15. K. Xhanari and M. Finsgar, Organic corrosion inhibitors for aluminum and its alloys in chloride and alkaline solutions: A review, Arabian Journal of Chemistry, 12, 4646 (2019). Doi: https://doi.org/10.1016/j.arabjc.2016.08.009
  16. T. J. Park, K. A. Kim, J. Y. Lee, and H. Jang, Corrosion Inhibition of Steel by Addition of Birch Sap in Chloride Solution, Corrosion Science and Technology, 17, 225 (2018). Doi: http://doi.org/10.14773/CST.2018.17.5.225
  17. T. A. Soylev and M. G. Richardson, Corrosion inhibitors for steel in concrete: State-of-the-art report, Construction And Building Materials, 22, 609 (2008). Doi: https:// doi.org/10.1016/j.conbuildmat.2006.10.013
  18. M. B. Valcarce and M. Vazquez, Carbon steel passivity examined in alkaline solutions: The effect of chloride and nitrite ions, Electrochimica Acta, 53, 5007 (2008). Doi: https://doi.org/10.1016/j.electacta.2008.01.091
  19. S. M. Abd El Haleem, S. Abd El Wanees, E. E. Abd El Aal, and A. Diab, Environmental factors affecting the corrosion behavior of reinforcing steel II. Role of some anions in the initiation and inhibition of pitting corrosion of steel in Ca(OH)2 solutions, Corrosison Science, 52, 292 (2010). Doi: https://doi.org/10.1016/j.corsci.2009.09.004
  20. I. Carrillo, B. Valdez, R. Zlatev, M. Stoytcheva, M. Carrillo, and R. Babler, Electrochemical study of oxyanions effect on galvanic corrosion inhibition, International Journal of Electrochemical Science, 7, 8688 (2012).
  21. M. Hayyan, S. A. Sameh, A. Hayyan, and I. M. Al Nashef, Utilizing of sodium nitrite as inhibitor for protection of carbon steel in salt solution, International Journal of Electrochemical Science, 7, 6941 (2012).