Thanks to the mechanical forces from the spray nozzles, the spray degreasing process is significantly faster then an immersion process.
Special low temperature alkaline degreasers are typically used to avoid excessive foaming inside the spray-washer.
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Spray-degreasing tunnels may be manufactured in either painted mild steel, stainless steel and composite material.
Most modern enameling shops are using one integrated overhead conveyor to avoid handling between the pretreatment & powder enamel application department.
In such case special attention should be paid to the conveyor tooling to ensure safe hanging & proper draining during spray-washing and easy transfer to the furnace conveyor after powder application.