To evaluate the effectiveness of cleaners/solvents for the removal of grease on aluminum substrate for 24-hour unheated immersion.
Date Run:
10/15/2020
Experiment Procedure:
Four of eight cleaning products were diluted with tap water at room temperature to vendor recommended concentration. Three cleaning products were used at the recommended 100% dilution and the solvent option was also used at 100% for industrial testing; all cleaners and solutions were measured for 200 mL. Pre-weighed aluminum coupons were coated over 1/3 of the surface with grease that has been provided by the company by using a metal spatula; three coupons were used for each cleaner/solvent. They were allowed a 24-hour dry time at room temperature; their dirty weights were recorded. The coupons were immersed in the cleaners/solvents at room temperature for 24-hours then were taken out and placed on trays with paper towels; they were left to dry for 24 hours. Final weights and observations were recorded and evaluated.
Cleaners/Solvents used:
Liquinox (1%)
Dimethyl Glutarate (100%)
Mirachem (20%)
Metalnox (100%)
Micro 90 (1%)
Smart Solve (100%)
SC-Aircraft (5%)
Ozzy Juice 3 (100%)
Trial Results:
Removal was seen for Dimethyl Glutarate, Metalnox, Smart Solve, SC-Aircraft and Ozzy Juice. Metalnox was over 50% removal but grease that was left on the coupon hardened and was difficult to remove. Smart Solve was also over 50% removal. The coupon deteriorates when left in Micro 90 at 1% for 24 hours; coupons were destroyed and the percentage removal shows weight lost.
Solvent/Cleaner
initial weight of soil
final weight of soil
% Removal
Average
Liquinox 1%
0.5234
0.5009
4.30
4.31
0.6426
0.6129
4.62
0.6719
0.6450
4.00
Dimethyl Glutarate 100%
0.4548
0.3306
27.31
29.99
0.8017
0.4582
42.85
0.5917
0.4745
19.81
Mirachem 20%
0.8699
0.8670
0.33
2.19
0.9730
0.9407
3.32
0.6113
0.5934
2.93
Metalnox 100%
0.5268
0.1306
75.21
60.16
1.1302
0.6341
43.90
0.6818
0.2633
61.38
Micro 90 1%
0.6699
0.6509
2.84
-51.54
0.7701
0.7222
6.22
0.5944
1.5673
-163.68
Smart Solve 100%
1.1647
0.9291
20.23
56.05
0.6869
0.0059
99.14
0.8449
0.4328
48.78
SC-Aircraft 5%
1.5931
0.5808
63.54
21.03
0.7455
0.7493
-0.51
0.7039
0.7036
0.04
Ozzy Juice 3 100%
0.7000
0.3617
48.33
46.71
0.8333
0.5392
35.29
0.9857
0.4288
56.50
Success Rating:
Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.
Conclusion:
There was some removal of grease from the coupons, but it was not over 80% effective, additional testing is required. Next steps are to add agitation via stir-bar for 15 minutes, 30 minutes, and 1-hour intervals. Metalnox will be taken out of evaluation because of the hardening of grease when coupons were left in for 24 hours. Super Solve will take its place and will be evaluated at 50% concentration. Micro 90 1% will not be evaluated for times lasting over 1 hour due to its reaction with aluminum seen at 24 hours.
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