Coupons were cleaned and dried with a heat gun to get the clean weight. A total of nine coupons were contaminated with contaminants #1, #2 and #4. #3 was omitted because of lack of coupons and this appears to be the easiest contaminant to remove. The coupons were then weighed after contamination. Cleaning was done in an agitated stirbar beaker at 140 degrees for 5 minutes. The parts were then rinsed in tap water at 140 degrees for 5 minutes. Drying was done under the air knives for 2 minutes and then placed in an oven set at 216 degrees for 90 minutes.
Trial Results:
Lapping compound cleaned at 142 degrees, some removal by aggitation alone, very easy to remove contaminant by brushing for about 15 seconds. Vavoline grease cleaned at 146 degrees. Residual lapping compound in the cleaner seems to be clinging to the grease at first, but after a few minutes, you can see the grease being removed. Excellent removal of grease upon cleaning and rinsing. The Oakite cleaner is doing an excellent job of removing the Selmer oil. It appears one of the coupons was quite dirty after cleaning (the other two looked clean), this is probably due to the lack of aggitation it recieved.
TURI SURFACE CLEANING LAB EXPERIMENTAL DATA LOG GRAVIMENTRIC ANALYSIS
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
The Oakite 3800 was the best cleaner overall with a percentage removal of contaminants ranging from 100 to 51 percent. The 51 percent achieved on coupon 4801 was due to the lack of agitation this part received. Due to the success of this trial, Oakite 3800 will be used on the next trial for Musical Instrument Re-finisher when the parts from Musical Instrument Re-finisher will be cleaned with beaker agitation. This time contaminant #3 will be used and we are considering cleaning off the pieces with a cloth instead of a brush to protect the surface.
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