Abstract

In the current research, metal coatings applied by Twin-Wire Arc spraying technique was used for decorative and protective coatings application for architectural elements and furniture. Aluminum, copper and its alloys (brass, bronze) were deposited on ceramic tiles, hardwoods and medium density fiberboards, for both interior and exterior applications. The coated parts were installed either as sprayed or after the coating surface finishing. In exterior applications for added protection, the coatings porosity was sealed by a penetrating sealant. The coatings microstructure was examined under optical and scanning electron microscopes and their adhesion to substrates was measured according to the standard pull-off test. The coating visual appearance did not show any significant changes after exposure to the urban environment for more than five years. The coated furniture was cleaned regularly by the conventional detergents and after two years no changes in color or tarnishing of the coatings were observed. Copper alloy coatings have provided important additional benefit to be a potent biocidal surface. Since, the outbreak of COVID-19 virus has become a global pandemic, the copper alloy coated touch surfaces can be a way to prevent the human-to-human transmissions of virus and pathogens via infected surfaces.

Keywords:Twin-Wire Arc spray; Biocidal surface; Architecture; Green technology; Metallic coating