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Trial Number 4

Trial Purpose:

To test previously tested cleaning chemistries on second contaminant oil.

Date Run:

09/11/1998

Experiment Procedure:

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)

Trial Results:

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

Success Rating:

A follow up test, usually based on company input.

Conclusion:

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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