Trial #4
To test previously tested cleaning chemistries on second contaminant oil.
Six preweighed coupons were contaminated with oil using a hand held swab and then weighed. Two cleaning solutions were made into 15% solutions using DI water in a 600 mL beaker. The solutions were heated to 130 F on a hot plate. The beakers were then placed into a Crest 40 kHz ultrasonic tank model 4Ht 1014-6 also at 130 F. Three coupons were placed in each cleaner for a set cleaning time. The cleaning time was 5 minutes. Coupons were rinsed in tap water at 120 F for 30 seconds and air dried. Final weights were taken after drying was complete.
SUBSTRATE MATERIAL: Copper/Nickel 70/30
CONTAMINANTS: Oil- Indopol L-14 (Polybutene/butene copolymer CAS# 9003-29-6)
The WR Grace had limited success in removing the oil after 5 minutes of cleaning in the ultrasonic tank. Calgon AK 6215 worked exceptionally well during the cleaning period. Table 1 lists the cleaning results from this trial.
Table 1. Cleaning Efficiencies
| Daraclean
|
Ak-6215
|
| 5min
|
5min
|
| 60.21
|
94.65
|
| 76.39
|
97.12
|
| 90.22
|
100.4
|
| 75.61
|
97.39
|
| 15.02
|
2.884
|
Calgon’s Ak-6215 removed almost all of the contaminant after 5 minutes of cleaning. MSDSs of both chemistries have been included with this report.
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