Trial #5
To determine the minimum cleaning time for the selected aqueous cleaner on second oil
Twelve pre-weighed coupons were contaminated with oil using a hand held swab and then weighed. One cleaning solution was 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 were 30, 60 120, and 180 seconds. 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)
Calgon AK 6215 worked exceptionally well during all of the cleaning times. Table 1 lists the cleaning results from this trial.
Table 1. Cleaning Efficiency of Calgon Ak-6215
| Cleaning Time (sec)
|
30
|
60
|
120
|
180
|
| Coupon 1
|
102.1
|
100.6
|
100.4
|
99.4
|
| Coupon 2
|
101.1
|
100.5
|
99.8
|
99.9
|
| Coupon 3
|
101.0
|
99.1
|
100.0
|
100.1
|
| Ave
|
101.4
|
100.1
|
100.1
|
99.8
|
| Std Dev
|
0.6
|
0.8
|
0.3
|
0.4
|
The Calgon product has been determined to clean both contaminants in under 1 minute.
No relation