Abstract
Abstract Powder coatings have been used for coating metal substrates in industrial applications. The incorporation of nanofillers as muscovite mica and montmorillonite (MMT) can improve the properties of the coatings. The objective of this study is to develop, apply and characterize a hybrid powder coating (30% epoxy/70% polyester) adding nanofillers in concentrations of 2, 4 and 6 phr separately in a twin screw extruder. The characterization of the coatings was performed by thermal, mechanical and chemical analysis. The incorporation of clay into the polymer increased the surface roughness resulting in a diffuse reflection of incident light and on a gloss reduction. The muscovite mica presented a lamellar structure, constituted by a set of overlapping parallel plates. The morphology analysis showed that the MMT presented irregular agglomerates resulting in inferior mechanical properties to coatings with muscovite mica. In the salt spray test, all samples showed high corrosion protection, around 850 hours.
Highlights
One of the most used metal substrate protection among the nanometer-scaled materials that can be used. systems in industry is the powder coating, because it has MMT clays generally provide better mechanical properties excellent mechanical and chemical resistance and corrosion and improve the thermal stability, with an elevated heat properties
The objective of this work is to produce, apply and characterize a hybrid powder coating by separately adding mica muscovite and MMT 30B at concentrations of 2, 4 and 6 phr, evaluating the thermal, mechanical, chemical and morphological properties resulting from the addition of these clay minerals
The TGA and DTG thermograms obtained with the analysis of the hybrid powder coating and a commercial formulation of coatings incorporating 2, 4 and 6 phr of muscovite mica and MMT 30B are shown in Figure 2 and Figure 3
Summary
One of the most used metal substrate protection among the nanometer-scaled materials that can be used. systems in industry is the powder coating, because it has MMT clays generally provide better mechanical properties excellent mechanical and chemical resistance and corrosion and improve the thermal stability, with an elevated heat properties. Systems in industry is the powder coating, because it has MMT clays generally provide better mechanical properties excellent mechanical and chemical resistance and corrosion and improve the thermal stability, with an elevated heat properties. These coatings are free from volatile distortion temperature and flame retardant ability[11]. The epoxy-based coating has a high performance which provides stability in a corrosive environment, good adhesion properties on metallic substrates as well as good mechanical and thermal properties, but it has a low resistance to natural weathering[1,8,9]. The objective of this work is to produce, apply and characterize a hybrid powder coating by separately adding mica muscovite and MMT 30B at concentrations of 2, 4 and 6 phr, evaluating the thermal, mechanical, chemical and morphological properties resulting from the addition of these clay minerals
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