Skip to content
Research Article Open access CC BY 3.0

Characterization and Corrosion Resistance of Galvanized Steel/Passivation Composite/ Polyurethane Paint Systems

A. R. Di Sarli, C. I. Elsner, C. R. Tomachuk

Current Journal of Applied Science and Technology · pp. 853–878 · Published 12 Dec 2013

10.9734/BJAST/2014/6813

Abstract

The corrosion performance of electrogalvanised steel sheets pre-treated with a Cr3+ or Cr+6-based conversion layer and then covered with polyurethane-waterborne topcoat paint has been studied. The pre-treated metallic panels were coated with one of the three tested polyurethane (PU) topcoat paints, in which the dispersion type was the formulation variable. The pigment was TiO2 (rutile) with a PVC value of 10. Before and after the immersion in 0.05 M NaCl (pH 5.70) or 0.1 M Na2SO4 (pH 6.36) solutions, replicates of the different samples were subjected to standardized tests (porosity, gloss and color, hardness, flexibility). During the immersion, blistering and rusting degrees were evaluated through periodical visual inspections, while the coated steel performance was monitored by Electrochemical Impedance Spectroscopy (EIS) measurements. Initial (dry) and final (wet) paint adhesion was also determined. EIS data were interpreted and discussed in terms of the time dependence of the electrical (paint coating) and electrochemical (steel substrate) parameters associated with interfacial processes describing the metal/paint system deterioration. According to the electrochemical properties, visual inspection and standardized tests results, it was concluded that the studied polyurethane-based polymeric films applied on pretreated electrogalvanised steel provided a very effective protection against corrosion as a result of their excellent barrier properties.  

Passivating trivalent chromium electrogalvanised steel organic coating impedance spectroscopy corrosion

References (69)

  1. 1 Structural engineering of polyurethane coatings for high performance applications [DOI]
  2. 2 Studies of a new accelerated evaluation method for coating corrosion resistance — thermal cycling testing [DOI]
  3. 3 Electrochemical and structural properties of a polyurethane coating on steel substrates for corrosion protection [DOI]
  4. 4 Evaluation of corrosion protection properties of additives for waterborne epoxy coatings on steel [DOI]
  5. 5 The use of pre-treatments based on doped silane solutions for improved corrosion resistance of galvanised steel substrates [DOI]
  6. 6 Studies of impedance models and water transport behaviors of polypropylene coated metals in NaCl solution [DOI]
  7. 7 Electrochemical behavior of zinc-rich powder coatings in artificial sea water [DOI]
  8. 8 Passivity of Metals [DOI]
  9. 9 Corrosion control by organic coatings
  10. 10 Comparison of the morphology and corrosion performance of Cr(VI)- and Cr(III)-based conversion coatings on zinc [DOI]
  11. 11 Alkyd-acrylic hybrid systems for use as binders in waterborne paints [DOI]
  12. 12 A new technique able to measure directly the delamination of organic polymer films [DOI]
  13. 13 Electrochemical study on the corrosion resistance of Cr III-based conversion layers on zinc coatings [DOI]
  14. 14 Effect of an inhibitive pigment zinc-aluminum-phosphate (ZAP) on the corrosion mechanisms of steel in waterborne coatings [DOI]
  15. 15 EIS study on failure process of two polyurethane composite coatings [DOI]
  16. 16 Evaluation of the surface treatment effect on the anticorrosive performance of paint systems on steel [DOI]
  17. 17 Glossy topcoat exterior paint formulations using water-based polyurethane/acrylic hybrid binders [DOI]
  18. 18 Microstructural characteristics of cerium oxide conversion coatings obtained by various aqueous deposition methods [DOI]
  19. 19 An electrochemical study of the delamination of polymer coatings on galvanized steel [DOI]
  20. 20 Corrosion performance of waterborne coatings for structural steel [DOI]
  21. 21 Characterization of waterborne acrylic based paint films and measurement of their water vapor permeabilities [DOI]
  22. 22 An investigation into the uv breakdown of thermoset polyester coatings using impedance spectroscopy [DOI]
  23. 23 Adhesion enhancement in waterborne acrylic latex binders synthesized with phosphate methacrylate monomers [DOI]
  24. 24 Performance of coated steel systems exposed to different mediaPart I. Painted galvanized steel [DOI]
  25. 25 Rheology of waterborne coatings [DOI]
  26. 26 Structure of waterborne coatings by electrochemical impedance spectroscopy and a thermostimulated current method: influence of fillers [DOI]
  27. 27 The use of new blockcopolymeric dispersing agents for waterborne paints — theoretical and practical aspects [DOI]
  28. 28 Impedance measurements for the evaluation of protective nonmetallic coatings [DOI]
  29. 29 A comparative study between Cr(VI)-containing and Cr-free films for coil coating systems [DOI]
  30. 30 Effects of morphology and surface treatment of inorganic pigments on waterborne coating properties [DOI]
  31. 31 Degradation mechanism of electrodeposited coatings in alkaline solution [DOI]
  32. 32 Electrical and electrochemical resistances for the evaluation of protective nonmetallic coatings [DOI]
  33. 33 Monitoring Degradation of Single and Multilayer Organic Coatings: I. Absorption and Transport of Water: Theoretical Analysis and Methods [DOI]
  34. 34 Stability of pigment and resin dispersions in waterborne paint [DOI]
  35. 35 Zinc carboxylating: a new conversion treatment of zinc [DOI]
  36. 36 Performance of Anticorrosive Coatings Containing Tripolyphosphates in Aggressive Environments [DOI]
  37. 37 Effect of dispersion agent on the degradation of a water borne paint on steel studied by scanning acoustic microscopy and impedance [DOI]
  38. 38 Study of chromate-free pretreatments and primers for the protection of galvanised steel sheets [DOI]
  39. 39 Evaluation of steel/primer based on chestnut tannin/paint film systems by EIS [DOI]
  40. 40 Corrosion behavior of zinc chromate coatings [DOI]
  41. 41 Formulation of water-borne dispersions for corrosion-protective primers [DOI]
  42. 42 The effect of a conversion layer and organic coating on the electrochemical behavior of 8006 and 8079 aluminum alloys [DOI]
  43. 43 The dependence of the corrosion protection of water‐borne paints on the concentration of the anticorrosive pigment [DOI]
  44. 44 Preparing hot-dip galvanized steel surfaces for painting or powder coating: a primer [DOI]
  45. 45 Influence of drying temperature on the corrosion performance of chromate coatings on galvanized steel [DOI]
  46. 46 A perspective on resins for aqueous coatings [DOI]
  47. 47 A review of chromate-free passivation treatments for zinc and zinc alloys
  48. 48 Zero VOC Coating Technology - Innovative Solutions for Old Problems [DOI]
  49. 49 Corrosion and electrochemistry of zinc [DOI]
  50. 50 Corrosion Protection by Organic Coatings [DOI]
  51. 51 Corrosion and Electrochemistry of Zinc [DOI]
  52. 52 Electrochemical assessment of the self-healing properties of Ce-doped silane solutions for the pre-treatment of galvanised steel substrates [DOI]
  53. 53 Effect of nano-Fe2O3 particles on the corrosion behavior of alkyd based waterborne coatings [DOI]
  54. 54 Mechanisms of non-toxic anticorrosive pigments in organic waterborne coatings [DOI]
  55. 55 Application of EIS and SEM to evaluate the influence of pigment shape and content in ZRP formulations on the corrosion prevention of naval steel [DOI]
  56. 56 Electrical and electrochemical measurements as predictors of corrosion at the metal—organic coating interface [DOI]
  57. 57 Residual stability of polyurethane automotive coatings measured by chemiluminescence and equivalence of Xenotest and Solisi ageing tests [DOI]
  58. 58 Corrosion resistance of Cr(III) conversion treatments applied on electrogalvanised steel and subjected to chloride containing media [DOI]
  59. 59 Study of iron benzoate as a novel steel corrosion inhibitor pigment for protective paint films [DOI]
  60. 60 Adhesion of waterborne paints to wood [DOI]
  61. 61 Performance of coated steel systems exposed to different media [DOI]
  62. 62 Internal stresses in zinc-chromate coatings [DOI]
  63. 63 Electrochemical Impedance Spectroscopy Study of the Corrosion Process on Coated Galvanized Steel in a Salt Spray Fog Chamber [DOI]
  64. 64 Development of novel waterborne poly(1-naphthylamine)/poly(vinylalcohol)–resorcinol formaldehyde-cured corrosion resistant composite coatings [DOI]
  65. 65 Making Paint from Alkyd Emulsions [DOI]
  66. 66 Additives for Waterborne Coatings
  67. 67 A Perspective on Resins for Aqueous Coatings [DOI]
  68. 68 Correlation between accelerated tests and outdoor exposure of coil coated chromate and chromate free systems [DOI]
  69. 69 Additives for Waterborne Coatings [DOI]

Cited by 7

A Review of Recent Developments in Coating Systems for Hot-Dip Galvanized Steel

Zhen Yu, Jiming Hu, Huimin Meng · Frontiers in Materials · 2020

Trivalent chromium conversion coatings

Sanaz Hesamedini, Andreas Bund · Journal of Coatings Technology and Research · 2019

Comparison of Friction Properties of GI Steel Plates with Various Surface Treatments

Miroslav Tomáš, Stanislav Németh, Emil Evin · Lubricants · 2024

Influence of medium polyurethane coating on mechanical, wear, and corrosion performance of a galvanised steel sheet

Sneha Roy, Swarup Kumar Ghosh · Journal of Alloys and Metallurgical Systems · 2025

Showing 4 of 7 known citations — external sources report more than can currently be individually listed.

Article metrics

Real usage data collected on this platform.

21

Page views

0

PDF downloads

2

Outbound clicks

7

Citations

Views over time

Views by country

Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".

Traffic sources

Referring site, by host.

Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.