Wpływ promieniowania UV na destrukcję powłok akrylowo-epoksydowych nadwozi samochodowych

• Autorzy: Kotnarowska Danuta , Urban Paulina

Identyfikatory

DOI

10.15199/40.2022.9.2

Warianty tytułu

EN

An influence of UV radiation on the destruction of acrylic-epoxy coatings of car bodies

• Języki publikacji: PL

Abstrakty

PL

W artykule przedstawiono wpływ przyspieszonego starzenia (w okresie 56 dni) pod wpływem promieniowania ultrafioletowego (modelującego słoneczne promieniowanie UV) na zmiany w strukturze chemicznej powłokotwórczego tworzywa akrylowego oraz na destrukcję fizyczną powłok akrylowo-epoksydowych. Starzone powłoki na skutek wzrostu stopnia utlenienia tworzywa akrylowego oraz w wyniku zwiększenia ich twardości wykazywały dużą kruchość, co sprzyjało wykruszaniu fragmentów powłok z ich warstwy nawierzchniowej i pośredniej. Przyczyniło się to do zmniejszenia grubości starzonych powłok. Oddziaływanie promieniowania UV spowodowało różnego typu destrukcję powłok, m.in. powstanie mikropęknięć (w tym pęknięć srebrzystych), kraterów oraz rzadzizn. Defekty te oraz wykruszanie składników powłok doprowadziły do niekorzystnych zmian właściwości powłok, takich jak wzrost chropowatości powierzchni (ocenianej za pomocą parametrów Ra, Rz oraz Rmax), a także do zmiany jej topografii. Wpłynęło to na znaczne zmniejszenie połysku powłok, a także na spadek ich odporności na zginanie.

EN

The article presents an influence of accelerated ageing (for over 56 days) with ultraviolet radiation (modelling UV solar radiation) on the changes in the chemical structure of acrylic coating material and the physical structure of acrylic-epoxy coatings. As a result of an increased degree of oxidation, and increased hardness, the aged coatings showed high brittleness, which favoured chipping of fragments of the top and intermediate coating layers. This contributed to a decrease in the thickness of the aged coatings. UV radiation caused various forms of coating destruction, e.g. microcracks (including silver cracks), craters, and areas of shrinkage. These defects, as well as chipping of the coating components, led to negative changes in the properties of the coatings, such as an increase in the roughness of the surface (assessed with Ra, Rz, and Rmax parameters), and the changes in its topography. This resulted in a significant decrease in the shine and bending resistance of the coatings.

Słowa kluczowe

PL

korozja; badania kwalifikacyjne; powłoki malarskie; offshore; odwarstwienie katodowe

EN

corrosion; classification tests; paint coatings; offshore; cathodic delamination

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Ochrona przed Korozją
• Rocznik: 2022
• Tom: nr 9
• Strony: 286--292
• Opis fizyczny: Bibliogr. 45 poz., tab., rys., wykr.

Twórcy

autor

Kotnarowska Danuta

• Uniwersytet Techniczno-Humanistyczny w Radomiu

• https://orcid.org/0000-0001-8790-3381

autor

Urban Paulina

• Uniwersytet Techniczno-Humanistyczny w Radomiu

• https://orcid.org/0000-0002-2529-3132

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).