To identify possible cleaner for removal of lubricant/grease from silver
Date Run:
01/23/2002
Experiment 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.
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