Resistance of Anticorrosive Coatings on Carbon Steel in Nine Cities of Ecuador

Document Type : Original Article


Centro de Investigaciones Aplicadas a Polímeros, Escuela Politécnica Nacional, P.O. Box: 170517, Quito, Ecuador.


This study shows the protection level of various anticorrosive coatings applied on carbon steel through laboratory and field tests performed in a salt spray test chamber and a xenon arc testing machine for up to 500 hours. Field tests developed them during one year in nine cities of Ecuador (South America). Quito (two urban stations), Guayaquil (one station marine and another urban-marine), Santo Domingo (subtropical station), Manta (urban-marine), Portoviejo (urban), Machala (urban-marine), Latacunga (urban), Cuenca (industrial), and Esmeraldas (industrial-marine). Field tests allowed it to determine the corrosive category of these cities. The stations from Esmeraldas and Cuenca presented the most aggressive environments.  In this first-year study, the results obtained with these coatings evidence their behavior depends on the test station. This behavior explained remarkable differences in marine, industrial, mixed locations and those with high relative humidity.


Main Subjects

  1. I. Iribarren, F. Liesa, C. Alemán, E. Armelin, Corrosion rate evaluation by gravimetric and electrochemical techniques applied to the metallic reinforcing structures of a historic building, J. Cult. Heritage, 27(2017), 153-163.
  2. Y. R. Surnam, Prevention and cost of atmospheric corrosion in Mauritius, Anti-Corros. Methods Mater.,60(2013), 73-83.
  3. Vera, M. Puentes, R. Araya, P. Rojas, A. Carvajal, Chile atmospheric corrosion map: results after one year of exposure, Rev. Constr., 11(2012), 61-72.
  4. Persson, D. Thierry, O. Karlsson, Corrosion and corrosion products of hot dipped galvanized steel during long term atmospheric exposure at different sites world-wide, Corros. Sci., 126(2017), 152-165.
  5. Nazarov, M. G. Olivier, D. Thierry, SKP and FT-IR microscopy study of the paint corrosion de-adhesion from the surface of galvanized steel, Prog. Org. Coat., 74(2012), 356-364.
  6. I. Aly, A. H. Moustafa, E. K. Ahmed, H. Abd El-lateef, M. Gamal Mohamed, S. M. Mohamed, New Polymer Syntheses Part 60: A Facile Synthetic Route to Polyamides Based on Thieno[2,3-b]thiophene and Their Corrosion Inhibition Behavior, Chin. J. Polym. Sci., 36(2018), 835-847.
  7. I. Aly, M. Gamal Mohamed, O. Younis, M. H. Mahross, M. Abel-Hakim, M. M. Sayed, Salicylaldehyde azine-functionalized polybenzoxazine: Synthesis, characterization, and its nanocomposites as coatings for inhibiting the mild steel corrosion, Prog. Org. Coat., 138(2020), 105385.
  8. I. Aly, A. Mahdy, M. A. Hegazy, N. S. Al-Muaikel, S. W. Kuo, M. Gamal Mohamed, Corrosion Resistance of Mild Steel Coated with Phthalimide-Functionalized Polybenzoxazines, Coating, 10(2020), 1114.
  9. Gamal Mohamed, S. W. Kuo, A. Mahdy, I. M. Ghayd, K. I. Aly, Bisbenzylidene cyclopentanone and cyclohexanone-functionalized polybenzoxazine nanocomposites: Synthesis, characterization, and use for corrosion protection on mild steel, Mater. Today Commun., 25(2020), 101418.
  10. I. Elsner, D. B. del Amo, L. S. Hernández, A. R. Di Sarli, Corrosion Behaviour of Steel/55%Al – Zn Alloy/Paint Systems Exposed to Natural and Artificial Environments, Can. J. Chem. Eng., 92(2014), 623-632.
  11. Navarrete, O. Salgado, Determination of the atmospheric corrosivity of the cities of Santo Domingo and Esmeraldas, Engineering thesis, National Polytechnic School, Ecuador, 2017.
  12. Chiba, I. Muto, N. Hara, Cut Edge Corrosion Inhibition by Chromate in Primer of Prepainted 55 % Al – Zn Alloy Coated Steel, J. Electrochem. Soc., 158(2011), 42-47.
  13. Alcántara, D. De la Fuente, B. Chico, J. Simancas, I. Díaz, M. Morcillo, Marine atmospheric corrosion of carbon steel: A review, Rev. Metal., 10(2017), 406.
  14. Morcillo, Corrosion and protection of metals in Iberoamerican atmospheres: Part 1: Iberoamerican maps of atmospheric corrosivity: Project MICAT XV. 1, CYTED, 1998, 61-67
  15. Standard Practice for Conducting Atmospheric Corrosion Tests on Metals, Annual Book of ASTM Standard, ASTM Standard, G50, 2015.
  16. Metals and alloys. Atmospheric Corrosion Tests. General requirements, Annual Book of ISO, 8565, 2012.
  17. Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test, Annual Book of ASTM Standard, ASTM Standard, G1, 2017.
  18. Corrosion of metals and alloys. Corrosivity of Atmospheres. Classification, determination and estimation, Annual Book of ISO, 9223, 2012.
  19. Corrosion of metals and alloys. Removal of corrosion products on the corrosion test specimens, Annual Book of ISO, 8407, 2014.
  20. Paints and varnishes Evaluation of the degradation of coatings Designation of intensity, quantity and size of the most common types of defects Part 1: General introduction and designation system, Annual Book of ISO, 4628-1, 2016.
  21. Standard Practice for Operating Salt Spray (Fog) Apparatus 1, Annual Book of ASTM Standard, ASTM Standard, B117, 2018.
  22. Standard Practice for Modified Salt Spray (Fog) Testing 1, Annual Book of ASTM Standard, ASTM Standard, G85, 2011.
  23. Nichols, Paint Weathering Tests. Handbook of Environmental Degradation of Materials, Elsevier Inc., Dearborn, 2018, 51-67.
  24. E. Almeida, Study of the behavior of alkyd paint systems with nanoparticulate pigments of zinc oxide and titanium dioxide in urban and industrial atmospheres of the city of Quito, Engineering thesis, National Polytechnic School, Ecuador, 2011
  25. G. Castaño, C. A. Botero, S. Peñaranda, Atmospheric corrosion of zinc in outdoor and indoor environments. Rev. Metal., 43(2007), 133-145.
  26. Leygraf, I. Odnevall, J. Tidblad, T. Graedel, Atmospheric Corrosion, Wiley & Sons Edition, Hoboken, 2016, 28,35
  27. Palma, J. M. Puente, M. Morcillo, The atmospheric corrosion mechanism of 55%Al-Zn coating on steel, Corros. Sci., 40(1998), 61-68.
  28. Thierry, N. LeBozec, A. Le Gac, D. Persson, Long-term atmospheric corrosion rates of hot dip galvanised steel and zinc-aluminium-magnesium coated steel, Mater. Corros., 70(2019), 2220-2227.
  29. P. Volovitch, T. N. Vu, C. Allély, A. Abdel Aal, K. Ogle, Understanding corrosion via corrosion product characterization: II. Role of alloying elements in improving the corrosion resistance of Zn-Al-Mg coatings on steel, Corros. Sci., 53(2011), 2437-2445.