Moly spraying is a process used to increase the wear resistance of our aluminium castings. ‘Moly’ is the shortened name for molybdenum – a silvery-grey metal that has the sixth highest melting point of any element (2623°C).
Gas porosity may occur if hydrogen is introduced into the molten metal when it is poured into the mould. Hydrogen can be drawn in through moisture or water vapour in the atmosphere. Degassing is used to address this problem and it is carried out as a standard part of the Haworth Castings’ casting process.