Use of waste foundry sand (WFS) to produce protective coatings on aluminum alloy by plasma electrolytic oxidation

Exhaust dust is a solid byproduct resulting from the casting process. With the aim of finding an alternative use for this residue, evaluation was made of the possibility of producing ceramic coatings with the material. Coatings on 5052 aluminum alloys were obtained by the electrolytic plasma technique, using an electrolytic solution prepared with exhaust powder and distilled water (5 g/L). The electrolytic plasma was obtained by applying a...