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The purpose of this experiment was to determine the effectiveness of alternatives with heated immersion.
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 oil provided by the company and a dirty weight was recorded. Once cleaners reached the proper temperature, coupons were submerged into their respective cleaners for 15 minutes. After 15 minutes had passed, coupons cleaned with SC Aircraft & Metal were rinsed in a deionized water bath at room temperature. All 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||0.0618||0.0025||95.95||96.53|
|Aquavantage 3800 GD||0.0635||0.0110||82.68||86.86|
SC Aircraft & Metal was the most effective cleaner removing an average of 96.53% of the oil from stainless steel substrates. All cleaners showed significant improvement from previous trials except for Aquavantage 3800 GD, which performed best with unheated immersion and no rinse step. Further testing of Aquavantage 3800 GD should revert back to unheated immersion. However, all cleaners still possess a slight oil residue following the cleaning process. Increasing the temperature of heated immersion or adding a heated rinse step could help to eliminate 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 SC Aircraft & Metal was the most effective cleaner removing an average of 96.53% of the oil from stainless steel substrates. However, all coupons still possessed a slight oil residue following the cleaning process. Next steps would be to progress cleaners to a higher temperature or to add a heated rinse step to the current process.