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Trial Number 5

Client Number 79

Project Number 1

Trial Purpose:

To determine the minimum cleaning time for the selected aqueous cleaner on second oil

Date Run:

09/14/1998

Experiment 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.

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