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The purpose of this experiment was to determine the effectiveness of alternatives with heated immersion and a heated rinse step.
Cleaners were prepared to the following concentrations: Citranox 2%, Mirachem 500 20%, Water Works Heavy Duty Degreaser 7:1, SC Aircraft & Metal 20%, Aquaease 732 5%, Aquavantage 3800 GD 5%. All cleaners were heated to 100°F. Three stainless steel coupons were obtained and weighed for each of the cleaners being tested. Coupons were then soiled with a company provided oil and dirty weights were recorded. Once solutions reached the proper temperature, coupons were submerged into their respective cleaners for 15 minutes. After 15 minutes had passed, all coupons were submerged into a deionized water bath, also at 100°F, for 5 minutes. Coupons were then allowed to dry in air for 24 hours. Following the drying period, coupons were weighed again and a clean weight was recorded. Effectiveness of the cleaners was determined.
|Cleaner||Initial wt of cont.||Final wt of cont.||%Cont Removed||% AVG|
|SC Aircraft & Metal||0.1247||0.0103||91.74||89.81|
|Aquavantage 3800 GD||0.1500||0.0145||90.33||87.02|
The addition of the extended heated rinse step did not increase removal percentages or eliminate the residue as expected. Although improvements were not achieved, all cleaners remain effective at mostly removing the oil. All solutions have undergone a color change from clear to milky white indicating the removal of the oil. Next steps would be to incorporate agitation or a heated dry step to remove the lingering residue.
Success Rating:Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Upon completion of testing, it was determined that the addition of the extended heated wash step did not remove the remaining residue as expected. Next steps would be to include agitation to the cleaning process, or to incorporate a heated dry step to remove the post clean residue.