Prep:
Coupons were created from aluminum foil and were analyzed using the cleanospector to measure their initial reflectance values. Reflectance value data points were taken in five unique areas of the surface of each coupon. The average of the five data points were recorded as the initial reflectance of each coupon. The coupons were then soiled with a pea sized amount of various soils by spreading the soil evenly across the surface using a cotton swab. The same process of determining the reflectance value was repeated and each coupon's dirty reflectance value was recorded.
Cleaning:
The benchtop vacuum vapor degreaser was utilized with the Dowclene 1601 Modified Alcohol to clean each coupon for 10 minutes within the cleaning chamber. Once each coupon was removed, they were allowed to air dry for about 1 minute before taking clean reflectance value measurements.
Rotation= 60 rpm
T condenser= 0C
T vap= 20C
Analysis:
The recorded reflectance values of each coupon were used within an equation to generate a percentage representative of how close the clean reflectance value is to the initial reflectance value. It estimates how closely the coupons were returned to their original state after vacuum vapor degreasing. The equation is as follows
%=(Rclean-Rdirty/Rinitial-Rdirty)X100