The purpose of this experiment was to determine the effectiveness of cleaners after reducing total time to clean from 10 minutes to 5 minutes.
Date Run:
01/20/2021
Experiment Procedure:
Cleaners were prepared to the following concentrations: Metalnox 6386 100%, Dimethyl Glutarate 100%, Water Works Heavy Duty Degreaser 7:1, SC Aircraft & Metal Cleaner 20%, Crystal Simple Green Industrial 30 parts water. SC Aircraft was heated to 100°F while remaining cleaners were kept at room temperature. Three aluminum coupons were obtained and weighed for each of the cleaners being tested. Coupons were then soiled with V-4B oil and a dirty weight was recorded. Once solutions reached the proper temperature, coupons were submerged into their respective cleaners for 5 minutes. After 5 minutes, coupons cleaned with SC Aircraft were rinsed in a deionized water bath at 100°F for 30 seconds. All coupons were then dried with a heat gun to remove excess solution and allowed to finish drying in air for 24 hours. Following the drying step, coupons were once again weighed and a clean weight was recorded. Effectiveness of the cleaners was determined.
Trial Results:
Cleaner
Initial wt of cont
Final wt of cont
%Cont Removed
%AVG
Metalnox 6386
0.0385
-0.0001
100.26
100.41%
0.0233
0
100
0.0205
-0.0002
100.98
Dimethyl Glutarate
0.0134
-0.0003
102.24
101.54%
0.013
-0.0002
101.54
0.0119
-0.0001
100.84
Water Works Heavy Duty
0.0128
0
100
99.18%
0.0081
0.0002
97.53
0.0074
0
100
SC Aircraft & Metal
0.0082
-0.0004
104.88
105.84%
0.0101
-0.0005
104.95
0.0065
-0.0005
107.69
Crystal Simple Green
0.0081
-0.0001
101.23
102.73%
0.006
-0.0002
103.33
0.0055
-0.0002
103.64
All cleaners were effective at removing the soil from aluminum substrates. Decreasing the total time to clean to 5 minutes was effective in further reducing the increased percent removals to near 100%. There has consistently been no visual damage to any of the coupons cleaned with these solutions.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Upon completion of testing, it was determined that 5 minutes is the optimal time to remove the oil from aluminum substrates. All cleaners were able to remove soil within acceptable percent removals. Next steps would be to progress testing to the next soil detailed by the company starting at 5 minutes of immersion.
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