Trial Purpose:
To identify possible cleaner for removal of lubricant/grease from silver
Date Run:
01/23/2002Experiment Procedure:
Eight cleaners were selected from the lab's databases based on client supplied information. Each product was diluted to 5% in a 600 ml beaker using DI water and heated to 140 F on a hot plate. Twenty-four preweighed coupons were coated with Richard Apex Inc. D644 CPD Drawing compound using a hand held swab. Coupons were reweighed. Three coupons were cleaned in each solution for 1 minute using stir-bar agitation, followed by a 15 second rinse in tap water at 120 F and a 30 second drying using a heat gun at 500 F. Coupons were allowed to cool to room temperature and weighed again. Effectiveness of each product was calculated and recorded.
Trial Results:
All eight cleaners worked fairly well in the one minute of cleaning. Average cleaning efficiencies ranged from 84 to 99%. The results for each coupon are listed below.
| Coupon 1 | Coupon 2 | Coupon 3 | Average | Std Dev | |
| EXP 1400 | 96.03 | 90.48 | 82.63 | 89.71 | 6.73 |
| Green Stuff | 99.81 | 98.86 | 97.53 | 98.73 | 1.15 |
| SC AMC | 89.13 | 82.89 | 94.65 | 88.89 | 5.88 |
| Surface 930 | 88.75 | 81.92 | 82.96 | 84.54 | 3.68 |
| Inproclean | 88.33 | 86.90 | 88.05 | 87.76 | 0.75 |
| Simple Green | 86.36 | 86.96 | 83.70 | 85.67 | 1.74 |
| Beyond 2005 | 91.71 | 91.74 | 94.51 | 92.65 | 1.61 |
| Daraclean | 89.99 | 91.36 | 84.66 | 88.67 | 3.54 |
The coupons that were cleaned in this trial were over contaminated so that a worst case scenario could be evaluated.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.Conclusion:
All eight cleaners will be evaluated using 25 kHz ultrasonic cleaning.
