Influence of repainting on the mechanical properties, surface topography and microstructure of polyester powder coatings

• Autorzy: Szala M. , Kot E. A.

Identyfikatory

DOI

10.12913/22998624/69680

• Języki publikacji: EN

Abstrakty

EN

The literature does not provide a systematic analysis of the effect of electrostatic powder coating repainting of structural and constructional aluminum elements on their technological parameters. It is industrial practice that worn or damaged coatings be repainted. It is crucial to determine the effect of electrostatic sprayed coatings repainting on their microstructure, roughness and mechanical properties. The aim of the work is to determinate the influence of repainting of powder deposited polyester coatings on their mechanical properties, roughness and microstructure. This study examined three different electrostatic spray epoxy coatings with matt, silk gloss and fine structure-matt finish. Test panels were prepared as single- and double-layer paint coatings on the aluminum alloy 6060 substrate. Hence, six test sets of coatings were deposited. Each set contained six samples. The microstructure of the cross section of coating was investigated by scanning electron microscopy (SEM) and light optical microscopy (metallographic and stereoscopy microscope). The chemical composition of coating was analyzed by the SEM-EDS method. The 2D surface roughness of single- and double-layer coatings and 3D surface topography maps were examined using a profile measurement gauge. The mechanical properties of coatings were measured by cupping, bending, impact, adhesion to substrate tests run according to standard procedures. As a result, the influence of repainting of polyester powder coatings on their properties was determined. The results demonstrate that repainting has no effect on the microstructure and coating adhesion to substrate as well as the bending test results and roughness of matt and silk gloss coatings. It has been found that repainting affects the results of impact and cupping tests as well as the roughness of samples with fine structure surface finish.

Słowa kluczowe

EN

electrostatic powder spraying; microstructure; polyester resin; organic coating; mechanical properties; repainting; roughness parameter; powder coating

• Wydawca: Lublin University of Technology ; Polish Society of Ecological Engineering (PTIE), Branch of PTIE in Lublin
• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2017
• Tom: Vol. 11, no 2
• Strony: 159--165
• Opis fizyczny: Bibliogr. 20 poz., fig., tab.

Twórcy

autor

Szala M.

• Department of Materials Engineering, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36 Str., 20-618 Lublin, Poland

autor

Kot E. A.

• Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36 Str., 20-618 Lublin, Poland

Bibliografia

• 1. Bailey, A.G.: The science and technology of electrostatic powder spraying, transport and coating. Journal of Electrostatics. 45, 2, 85–120 (1998).
• 2. Barletta, M.: Combined use of scratch tests and CLA profilometry to characterize polyester powder coatings. Surface and Coatings Technology. 203, 13, 1863–1878 (2009).
• 3. Barletta, M. et al.: On the combined use of scratch tests and CLA profilometry for the characterization of polyester powder coatings: Influence of scratch load and speed. Applied Surface Science. 254, 22, 7198–7214 (2008).
• 4. Blicharski, M.: Inżynieria powierzchni. Wydawnictwo Naukowo Techniczne, Warszawa (2009).
• 5. Díaz-Benito, B. et al.: Mechanical properties of polyester films painted after silanization of 6063 aluminium alloy with different pretreatment conditions. Progress in Organic Coatings. 70, 4, 287–292 (2011).
• 6. Fu, J. et al.: Investigation of the recyclability of powder coatings. Powder Technology. 211, 1, 38–45 (2011).
• 7. Hu, R.-G. et al.: Recent progress in corrosion protection of magnesium alloys by organic coatings. Progress in Organic Coatings. 73, 2–3, 129–141 (2012).
• 8. Jelonek, A.: Malowanie farbami proszkowymi. Lakiernictwo przemysłowe. 3, 71, (2011).
• 9. Jr, Z.W.W. et al.: Organic Coatings: Science and Technology. John Wiley & Sons (2007).
• 10. Kłonica, M. et al.: Polyamide 6 surface layer following ozone treatment. International Journal of Adhesion and Adhesives. 64, 179–187 (2016).
• 11. Kwiatkowski, M.P. et al.: Comparative Analysis of Energetic Properties of Ti6Al4V Titanium and EN-AW-2017A(PA6) Aluminum Alloy Surface Layers for an Adhesive Bonding Application. Ozone: Science & Engineering. 35, 3, 220–228 (2013).
• 12. Lenkiewicz, K.: Nakładanie powłok lakierniczych. Instytut Technologii Eksploatacji – Państwowy Instytut Badawcz, Radom (2006).
• 13. McKeen, L.W.: Fluorinated Coatings and Finishes Handbook: The Definitive User’s Guide. William Andrew (2015).
• 14. Nechvílová, K., Kalendová, A.: Properties of organic coatings containing pigments with surface modified with a layer of ZnFe2O4. Advances in Science and Technology Research Journal. Vol. 9, nr 28, (2015).
• 15. Ofat, I., Kozakiewicz, J.: Modification of epoxy-polyester and polyester powder coatings with silicone-acrylic nanopowders – effect on surface properties of coatings. Polimery. 59, 09, 643–649 (2014).
• 16. Puig, M. et al.: Adhesion enhancement of powder coatings on galvanised steel by addition of organo-modified silica particles. Progress in Organic Coatings. 77, 8, 1309–1315 (2014).
• 17. Puig, M. et al.: The combined role of inhibitive pigment and organo-modified silica particles on powder coatings: Mechanical and electrochemical investigation. Progress in Organic Coatings. 80, 11–19 (2015).
• 18. QUALICOAT: Home - QUALICOAT, http://www. qualicoat.net/main/home.html.
• 19. Sharifi Golru, S. et al.: Effects of surface treatment of aluminium alloy 1050 on the adhesion and anticorrosion properties of the epoxy coating. Applied Surface Science. 345, 360–368 (2015).
• 20. Zinowicz, Z., Gauda, K.: Powłoki organiczne w technice antykorozyjnej. Wydawnictwo Politechniki Lubelskiej (2003).

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)