Browse Client Types

Browse past lab clients by general industry sectors

Trial Number 1

Trial Purpose:

To further evaluate cleaners from previous trial on second buffing compound.

Date Run:

03/28/2000

Experiment Procedure:

Four cleaners were selected based on the results of the previous trial. The chemistries were diluted to 5% in 600 ml beakers using DI water and then heated to 130 F on a hot plate.
Twelve preweighed brass coupons were contaminated with the buffing compound and weighed again. Three coupons were cleaned in one solution for five minutes using stir-bar agitation. Coupons were rinsed in tap water at 120 F for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for one minute. After coupons returned to room temperature, final clean weights were recorded and the percent efficiency was calculated.

SUBSTRATE MATERIAL: Brass Coupons
CONTAMINANTS: Matchless Metal Polishing Co. Z-230 Buffing compound (7429-90-5)
CONTAMINATING PROCESS USED: Manual rub of buffing compound onto coupons

Trial Results:

All four products tested were very successful in removing the second buffing compound from the brass coupons. The U.S. Polychem Polyspray Jet 790 P again removed all of the contaminant. (The efficiencies were over 100% and was due to the buffing compound removing some of the oxidation that had occurred on the coupons). The other three cleaners removed over 87% of the buffing compound. Table 2 lists the efficiencies for each cleaner evaluated.

Table 2. Cleaning Efficiencies

Cleaner Micro 90 Inproclean Polyspray Daraclean
Coupon 1 90.38 94.9 101.32 96.1
Coupon 2 90.83 90.32 102.13 80.94
Coupon 3 90.91 91.18 101.57 84.94
Average 90.71 92.13 101.68 87.33

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

Having determined that all of the cleaners were effective in removing the buffing compound using only simple immersion agitation, all four will be used to clean the supplied parts in a Crest 40 kHz ultrasonic tank model 4Ht 1014-6.

Save Report as a PDF