Trial Purpose:
To determine the minimum cleaning time for the selected aqueous cleaner on second oil
Date Run:
09/14/1998Experiment Procedure:
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)
Trial Results:
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 |
Success Rating:
A follow up test, usually based on company input.Conclusion:
The Calgon product has been determined to clean both contaminants in under 1 minute.
