Basic cleaning performance testing was conducted using ASTM G122 as the bases for cleaning.
Cleaning: Blast coupon with CO2 crystals ~ (-109 F) at varying flow rates in room temp ~ 68 F. Bursts were 2 seconds each, 3 per coupon in a sweeping motion. Gun was aimed at coupon, perpendicular to surface.
Contaminant: Oil - WD - 40 Company, WD 40 oil/lube petroleum distillate (8052-41-3 50, 68476-85-7, 64742-65-0)
None of the flow rate, delivery combinations with the CO2 snow gun were effective. An increase in effectiveness was an increase in flow rate of the CO2 with both the crystal producing nozzles and the flake producing adapter and tube.