Trial #1
To further evaluate cleaners from previous trial on second buffing compound.
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
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
|
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.
No relation