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Abrasion resistance of vitreous enamel coatings in function of frit composition and particles presence
University of Trento, Italy.
University of Trento, Italy.
RISE, SP – Sveriges Tekniska Forskningsinstitut. University of Trento, Italy; University of Jönköping, Sweden.
2015 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 332-333, p. 702-709Article in journal (Refereed) Published
Abstract [en]

Vitreous enamel is an inorganic coating applied on metallic substrates as powder and fired at relatively high temperature in order to cover the surface forming the coating. This kind of layer shows, at the same time, very good functional and aesthetical properties. In several applications, good mechanical resistance together with corrosion protection is required and enamel is a good alternative to other coatings. Enamel presents optimum corrosion protection and high hardness values but the low fracture toughness reduces its resistance to abrasive wear related to brittle fracture. The microstructure of enamel, the chemical composition of the frit, and the deposition parameters are crucial for the final properties. Moreover, it is possible to introduce mill additives in the frit or hard particles inside the layers to improve final resistance. In this paper, abrasion resistance of enamel is tested by Taber Abraser test. Mill additives (spodumene or quartz), hard (WC or SiC) or solid lubricant (graphite) particles have been added to the frit to study their influence on the abrasion resistance. The abrasion resistance of modified enamels was evaluated through mass loss after abrasion and wear track were observed by SEM in order to evaluate the abrasion damage. An improvement of the abrasion resistance was obtained modifying the frit with mill additives. The introduction of SiC and WC particles produced an important modification in wear mechanism of the glassy coating, reducing the crack nucleation due to the low pores quantity and good interface between vitreous matrix and particles. In these cases the wear mechanism is limited to scratches on the surface.

Place, publisher, year, edition, pages
Elsevier Ltd , 2015. Vol. 332-333, p. 702-709
Keywords [en]
Composite coatings, Mill additive, Taber test, Vitreous enamel, Abrasion, Additives, Brittle fracture, Corrosion, Corrosion protection, Enamels, Fracture, Fracture toughness, Silicon carbide, Solid lubricants, Substrates, Tribology, Tungsten carbide, Wear of materials, Aesthetical properties, Chemical compositions, Deposition Parameters, High temperature, Mechanical resistance, Metallic substrate, Vitreous enamels, Wear resistance
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-43910DOI: 10.1016/j.wear.2015.01.058Scopus ID: 2-s2.0-84937902428OAI: oai:DiVA.org:ri-43910DiVA, id: diva2:1393470
Available from: 2020-02-17 Created: 2020-02-17 Last updated: 2020-02-19Bibliographically approved

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