To test the removal of buffing compound by the first 8 selected HSPiP formulations.
Date Run:
03/01/2022
Experiment Procedure:
For silver bullet testing approximately 32 chemical combinations were determined via HSPiP. The first predetermined solvent combinations were selected based on their initial solvent in common. In this case, the eight chosen all contained D-limonene.
Solvent 1 (91% D-limonene and 9% Acetone)
Solvent 2 (67% D-limonene and 33% Benzyl Benzoate)
Solvent 3 (85% D-limonene and 15% Dimethyl Glutarate)
All mixtures were tested as compatible with both stainless steel aluminum. The initial contaminant to be tested with these 8 solvents was a buffing compound. Several trials were conducted to determine how to best coat the stainless steel coupons with the buffing compound evenly. Buffing compound is solid at room temperature and melts at temperatures 100F and up. Once heated it has a consistency similar to peanut butter. Unless heat is maintained the contaminant will return to its solid state very rapidly. Coupons were weighed prior to application. For application, the buffing compound was heated with a heat gun until it began to melt and the bottom 1/3rd of the coupons were coated using a knife. The coupons were then weighed again.
Testing was attempted using unheated immersion but due to the properties of the buffing compound, without heat the cleaners did little to remove any soil. Thus, official testing began with heated immersion for 15 minutes. All 8 solvents were heated to 38°C (~100°F) in separate beakers. Coupons were then immersed for 15 minutes and taken out to dry overnight. Clean weights were then taken the next day.
Trial Results:
Overall, solvents 1,2,3, and 6 were the most effective with very high % average removals. Solvents 4 and 8 were slightly less effective but still removed almost all of the contaminant. Solvents 5 and 7 were not very effective in removing the buffing compound with % removals at 61.84% and 32.53%.
Solvent
Initial cont.
Final cont.
%Cont Removed
% Average
1
0.6226
0.0077
98.76
98.52
0.9895
0.0110
98.89
1.0085
0.0212
97.90
2
0.8043
0.0193
97.60
98.15
0.7766
0.0156
97.99
0.9915
0.0112
98.87
3
0.7529
0.0048
99.36
99.28
0.9947
0.0114
98.85
0.9754
0.0036
99.63
4
0.9329
0.1055
88.69
90.51
0.9644
0.0032
99.67
0.8710
0.1465
83.18
5
1.1673
0.3606
69.11
61.84
0.9388
0.0574
93.89
0.8902
0.6898
22.51
6
1.0353
0.0180
98.26
98.83
0.6990
0.0082
98.83
0.9341
0.0057
99.39
7
0.9404
0.3106
66.97
32.53
0.8237
0.7050
14.41
1.0293
0.8624
16.21
8
1.0368
0.0391
96.23
91.53
1.1948
0.0102
99.15
1.1854
0.2463
79.22
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Results from this test were promising and adding agitation in the next test would very likely be enough to remove all soil.
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