Five sets of 26-28 titanium parts were provided pre-contaminated with J2. Cleaners were heated to vendor recommended temperatures before immersing the parts into an ultrasonic tank for 15 minutes. Visual observations were recorded overall with notes and a set of three parts per cleaner were evaluated by three lab technicians, labelled A-C in Table 1, for cleaner and contaminant residue according using the rating key below.
Experiment Procedure:
Five sets of 26-28 titanium parts were provided pre-contaminated with J2. Cleaners were heated to vendor recommended temperatures before immersing the parts into an ultrasonic tank for 15 minutes. Visual observations were recorded overall with notes and a set of three parts per cleaner were evaluated by three lab technicians, labelled A-C in Table 1, for cleaner and contaminant residue according using the rating key below.
Rating Key:
Rating Key
1
No Residue
2
Slight Residue
3
Noticeable Residue
4
Considerable Residue
5
Severe Residue
Trial Results:
Table 1: Visual Rating Results
Cleaner
Conc. (%)
Temp. (°F)
Before Cleaning Rating
After Cleaning Rating
Average Score
A
B
C
A
B
C
Dowanol PnBGE
100
100
4
5
4
2
2
1.5
2
Ozzy Juice SW 3
100
110
3
4
2.5
3
Metalnox M6386
100
130
1
1
1.5
1
Sta-Sol ESS 160
100
106
2
2
1.5
2
Liquinox
1
150
5
5
5
5
Visual Observations:
Dowanol PnBGE - Slight cleaner residue and soil residue that remained on parts after cleaning.
Ozzy Juice SW3 - Slight cleaner residue and soil residue that remained on parts after cleaning.
Metalnox M6386 - No cleaner residue or soil residue on parts after cleaning
Sta-Sol ESS-160 - No cleaner residue or soil residue on parts after cleaning, however, it took a while for the parts to completely dry
Liquinox - Cleaner residue and soil residue remained on parts after cleaning. Cleaner will need a rinse step going forward with testing.
Success Rating:
Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.
Conclusion:
Dowanol PnBGE, Metalnox 6386, and Sta-Sol ESS 160 were the most effective at removing J2 soil from titanium parts using heated ultrasonics.
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