The purpose of this experiment was to use unheated immersion to identify the hardest buffing compound to remove of the three compounds (Red Buffing, White Buffing, and Blue Buffing) using the cleaners Dimethyl glutarate and Metalnox 6386.
Date Run:
06/19/2020
Experiment Procedure:
All three soils were tested with each of the two cleaners: Dimethyl glutarate (100% concentration) and Metalnox 6386 (100% concentration). Three aluminum coupons were obtained and weighed for each of the soils, for a total of nine coupons per cleaner. Coupons were soiled with the respective buffing compounds; Red Buffing, White Buffing, or Blue Buffing, and a soiled weight was obtained. Coupons were then submerged into 200mL of their respective cleaners for 5 minutes at room temperature. After 5 minutes, coupons were air-dried, and a final clean weight was obtained. Effectiveness of the cleaners and difficulty of removal was determined.
Trial Results:
Cleaner
Contaminant
Initial wt of cont.
Final wt of cont.
% Cont. Removed
% AVG per soil
% AVG Total
Dimethyl glutarate
Red Buffing Compound
0.0092
0.0094
-2.174
32.36
44.93%
0.012
0.0092
23.33
0.0108
0.0026
75.926
White Buffing Compound
0.0039
0.0042
-7.693
9.99
0.0055
0.005
9.091
0.0056
0.004
28.571
Blue Buffing Compound
0.0241
0.0035
85.477
92.43
0.0749
0.0057
92.39
0.0846
0.0005
99.409
Metalnox 6386
Red Buffing Compound
0.0154
0.0013
91.558
96.8
91.23%
0.0216
0.0008
96.296
0.0315
-0.0008
102.54
White Buffing Compound
0.0085
0.0036
57.647
75.83
0.008
0.0031
61.25
0.0093
-0.0008
108.602
Blue Buffing Compound
0.0268
0.0006
97.761
101.07
0.0465
0.0013
97.204
0.0437
-0.0036
108.238
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
The White Buffing compound was the most difficult to remove for both cleaners (9.99% from Dimethyl glutarate and 75.83% from Metalnox 6386). Metalnox 6386 was the more effective cleaner overall in removing all three buffing compounds from aluminum substrates (91.23% removal total average).
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