Abstract

In this paper, effort has been made to determine the durability of polyurethane coating on mild steel in acid, alkaline and neutral soil. A total of 42 mild steel coupons were used. Out of the 42 coupons, 21 were coated with polyurethane and the remaining 21 were left uncoated. Acid soil (pH = 4.5), Alkaline soil (pH =13.5) and neutral soil (pH = 6.8) were used as the test media. Seven each of the coated and uncoated coupons were buried in each soil media. On weekly basis, one coated and one uncoated coupon were withdrawn from each of the soil media and reweighed. The durability of the coating in each soil media was calculated using a proposed model. From the results obtained, the durability of polyurethane coating was found to be 7.0yrs, 4.5yrs and 2.9yrs in neutral, acid and alkaline soil respectively.

Keywords

Durability, Polyurethane coating, Mild steel, Soil media,

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References

  1. Olamide Olawale, Adesoji Adeolu Adediran, & Segun Isaac Talabi, Geraldine Chika Nwokocha, Alewo Opuada Ameh, Inhibitory action of Vernonia amygdalina extract (VAE) on the corrosion of carbon steel in acidic medium, Journal of Electrochemical Science and Engineering, 7(3) (2017) 145-152.
  2. I. Umoru, A. Afonja, & B. Ademodi, Corrosion Study of AISI 304, AISI 321 and AISI 430 Stainless Steel in a tar sand Digester, Journal of Minerals and Materials Characterization and engineering, 7(4) (2008) 291-299.
  3. Gibson Stainless Steel and Specialty Inc., Corrosion Types and Prevention, (2017), Retrieved from https://www.gibsonstainless.com/type-of-corrosion.html
  4. H. Twancy, L. Al-Hadhrami, & F. Yousef, Analysis of Corroded Elbow Section of Carbon Steel Piping System of an Oil and gas Separator Vessel, 1(1) (2013) 6-14.
  5. M. Iiman, & Kusmono, Analysis of Internal Corrosion in Subsea Oil Pipeline, Case Studies in Engineering Failure Analysis, 2(1) (2013) 1-8.
  6. R. Brain, What are the different Grades of Steel, (2019). Retrieved from www.meadmetal.com
  7. W. Dani, Know About Steel Alloys, (2019). Retrieved from www.meadmetal.com
  8. Minnesota Pollution Control Agency, Cathodic Protection of Underground Storage Tank System, (2019). Retrieved from www.pca.state.mn.us
  9. S. Komalasari, M. Utami, Y. Aziz, & R. Irianti, Corrosion Control of Carbon Steel Using Banana peel extract as inhibitor in dilute acid solution, IOP Conference Series: Material Science and Engineering, 345 (2018) 012030.
  10. Corrosionpedia, what is polymeric coating? –Definition from corrosionpedia, Retrieved from https://www.corrosionpedia.com/definition/1454/polymeric-coating
  11. S. Amir, Use of Polyurethane coating to Prevent Corrosion in Oil and Gas Pipelines Transfer. International Journal of Innovation and Applied Studies, (2012), 1-8.
  12. M. I. Weththimuim, M. B. Chobba, D. Sacchi, M. Messaoud, and M. Licchelli, Durable Polymer Coatings: A Comparative Study of PDMS-Based Nanocomposites as Protective coating for stone materials, Chemistry, 4, (2022), 60-76.
  13. V. Fedyaev, E. Galimov, A. Belyaev, and L. Sirotkina, Durability of Polymer Powder Coatings, MATEC Web of Conference, 346, 02043, (2021), 1-4.
  14. K. Katerina, M. Lubomir, G. Hana, and P. Marketa, Predictions of Materials and Coating Durability based on Atmospheric and Laboratory Tests, Materials Science Forum, 844 (2016) 75-78.
  15. T. Saputra, & N. Agustinus, Extract of CocorBebek (KalencoePinnata) as a Corrosion Inhibitor, Jurnal Bahan Alam Terbarukan, 6(2) (2017).
  16. K. Anyanwu, I. Ogu, & H. Nzei, Effect of Sodium Chloride on the Corrosion Inhibition Efficiency of Polyethylene Coatings on Alloy Steel at Ambient Temperature, Journal of Engineering Science, 7 (1), (2020) C9-C13.
  17. V. Elisabeth, R. Caroline, J. Booth, & C. Mike, Degradation kinetics of poly(lactic-co-glycolic) acid block copolymer cast films in phosphate buffer solution as revealed by infrared and Raman spectroscopies, Polymer Degradation and Stability, 96(10), (2011) 1882-1889.
  18. L. Wei, F. Lim, & G. Ho, Room Temperature Sequential Ionic Deposition (SID) of Ag2S Nano-particles on TiO2 Hierarchical Spheres for Enhanced Catalytic Efficiency, Journal of Material Chemistry A, 3 (2015) 6509-6516.
  19. N. Njongmeta, P. A. Hall, L. Ledenbach, & R. S. Flowers, Acid-producing microorganisms, American Journal of Public Health, (2013).