Trial #6
To evaluate the effectiveness of heated dimethyl glutarate (130F) on removing Mystery Oil and Rustlick 50/50 on ceramic, copper, and aluminum coupons.
Nine pre-weighed coupons, three for each substrate, were used for each contaminant, and the coupons were contaminated halfway on one side using a hand-held swab. Contaminated weights were recorded before immersing three coupons of the same substrate into a beaker with heated (130F) dimethyl glutarate for 15 minutes. Visual observations were documented every five minutes for the complete 15 minutes before taking final weights.
| Soil
|
Substrate
|
Initial wt. of cont.
|
Final wt. cont.
|
% Cont. Removed
|
Average
|
| Soluble Oil #35
|
Ceramic
|
2.0268
|
-0.0001
|
100.00
|
96.10
|
| 0.0344
|
0.004
|
88.37
|
| 0.9067
|
0.0008
|
99.91
|
| Copper
|
0.0207
|
0.0004
|
98.07
|
98.93
|
| 0.0233
|
0.0003
|
98.71
|
| 0.0432
|
0.0000
|
100.00
|
| Aluminum
|
0.0067
|
0.0000
|
100.00
|
98.40
|
| 0.0145
|
0.0007
|
95.17
|
| 0.0080
|
0.0000
|
100.00
|
| Rustlick 50/50
|
Ceramic
|
-0.7849
|
0.0088
|
101.12
|
101.67
|
| 0.3119
|
0.0002
|
99.94
|
| 0.0456
|
-0.0018
|
103.94
|
| Copper
|
0.1686
|
0.0007
|
99.58
|
98.22
|
| 0.0797
|
0.0031
|
96.11
|
| 0.1060
|
0.0011
|
98.96
|
| Aluminum
|
0.0922
|
0.0060
|
93.49
|
95.03
|
| 0.1668
|
0.0048
|
97.12
|
| 0.0885
|
0.0049
|
94.46
|
Visual Observations:
Contaminant: Mystery Oil (Soluble Oil #35)
| Substrate
|
5 Mins
|
10 Mins
|
15 Mins
|
| Ceramic
|
- no visible bubbles - clear dilution
|
- no visible bubbles - clear dilution
|
- no change
|
| Copper
|
- no visible bubbles - clear dilution
|
- no visible bubbles - clear dilution
|
- no change
|
| Aluminum
|
- no visible bubbles - clear dilution
|
- no visible bubbles - clear dilution
|
- no change
|
Contaminant: Rustlick 50/50
| Cleaner
|
5 Mins
|
10 Mins
|
15 Mins
|
| Ceramic
|
- soil visibly removing from coupon - soil rising to top of dilution
|
- soil visible at top of solution
|
- soil visible at top of solution - solution blue
|
| Copper
|
- soil rising to top of solution
|
- soil visible at top of solution
|
- soil visible at top of solution - solution blue
|
| Aluminum
|
- soil rising to top of solution
|
- soil visible at top of solution
|
- soil visible at top of solution - solution blue
|
Heated dimethyl glutarate was effective at removing Mystery Oil or Rustlick 50/50. Next step is to test on parts provided by the client.
No relation