Trial Purpose:
To evaluate the effectiveness of solvent and aqueous based cleaners at the removal of J2 on titanium substrates.
Date Run:
08/14/2019Experiment Procedure:
Six sets of three pre-weighed clean titanium coupons were contaminated on the bottom 1/3 of the coupon with J2 oil using a cotton swab. Cleaners were heated to vendor recommended temperatures, and coupons were immersed three at a time into a beaker for 15 minutes. Visual observations were recorded every five minutes, and final weights were recorded after cleaning.
Trial Results:
Table 1: Gravimetric Results
| Cleaner | Conc. (%) | Temperature (°F) | Initial wt. of cont. (g) | Final wt. of cont. (g) | %Cont. Removed (g) | % Average Removal |
| Dowanol PnBGE | 100 | 100 | 0.2660 | 0.0006 | 99.77 | 99.75 |
| 0.2716 | 0.0005 | 99.82 | ||||
| 0.2971 | 0.0010 | 99.66 | ||||
| Metalnox 6386 | 100 | 110 | 0.4257 | 0.0046 | 98.92 | 98.64 |
| 0.3608 | 0.0031 | 99.14 | ||||
| 0.3755 | 0.0080 | 97.87 | ||||
| Dimethyl glutarate | 100 | 129 | 0.4796 | 0.0066 | 98.62 | 98.41 |
| 0.2905 | 0.0046 | 98.42 | ||||
| 0.2362 | 0.0043 | 98.18 | ||||
| Liquinox | 1 | 171 | 0.5055 | 0.0221 | 95.63 | 95.32 |
| 0.4376 | 0.0165 | 96.23 | ||||
| 0.3164 | 0.0187 | 94.09 | ||||
| OzzyJuice 3 | 100 | 106 | 0.3677 | 0.1465 | 60.16 | 55.10 |
| 0.3562 | 0.1643 | 53.87 | ||||
| 0.3015 | 0.1469 | 51.28 | ||||
| SC Aircraft & Metal Cleaner | 1 | 100 | 0.6532 | 0.1620 | 75.20 | 62.42 |
| 0.6221 | 0.2218 | 64.35 | ||||
| 0.4637 | 0.2424 | 47.72 |
Table 2: Visual Observations
| Cleaner | 5 Minutes | 10 Minutes | 15 Minutes |
| Dowanol PnBGE | -cleaner is clear -soil is highly viscous -soil line is not visible -no change in substrate
|
-no change in cleaner -soil line is not visible -no change in substrate |
-no change in cleaner -soil line is not visible -substrate is mainly wet -blue plastic on back of substrate is peeling off |
| Metalnox 6386 | -cleaner is clear -soil is highly viscous - soil line is not visible -no change In substrate |
-no change in cleaner -soil line is not visible -no change in substrate |
-no change in cleaner -soil line is not visible -substrate is mainly wet -blue plastic on back of substrate is peeling off |
| Dimethyl glutarate | -cleaner is clear -soil is highly viscous -soil line is not visible -no change in substrate |
-no change in cleaner -soil line is not visible -no change in substrate |
-no change in cleaner -soil line is not visible -substrate is mainly wet -blue plastic on back of substrate is peeling off |
| Liquinox | -cleaner is clear with bubbles -soil is highly viscous -soil line is not visible -soil sunk to bottom of beaker and formed clumps |
-no change in cleaner -no change in substrate -soil line is not visible |
-no change in cleaner -substrate is partly dry with some clumped soil towards the bottom of the substrate’s surface -blue plastic on back of substrate is peeling off |
| Ozzy Juice 3 | -cleaner has a slight brownish color -soil is highly viscous -some soil is visually coming off -no change in substrate |
-cleaner became slightly cloudy -soil formed clumps and submerged to the bottom of the beaker -soil line is moving towards the bottom of the substrate |
-cleaner became cloudy -some soil submerged to the bottom of the beaker -substrate is mainly wet -blue plastic on back of substrate is peeling off |
| SC Aircraft & Metal Cleaner | -cleaner has a slight yellow color with bubbles -soil line is visible -no change in substrate |
-some soil submerged to bottom of the beaker -soil line is visible -no change in substrate -no change in cleaner
|
-some soil submerged to the bottom of the beaker -soil line moved towards the bottom of the substrate -substrate is slightly wet -blue plastic on back of substrate is peeling off
|
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.Conclusion:
Dowanol PnBGE, Metalnox 6386, Dimethyl glutarate, and Liquinox were the most effective at removing J2 soil from titanium substrates using heated immersion.
