To identify safer cleaning solvent for removing oil, lubricant and grease from sub assemblies.
Date Run:
07/13/2000
Experiment Procedure:
Eight cleaners were selected from the lab’s database of effective cleaning and vendor supplied information. All were diluted to 5% by volume using DI water in 600 ml beakers and heated to 130 F on a hot plate. Twenty-four preweighed coupons were coated with the Elf Cut 51 oil using a swab and weighed a second time. Three coupons were immersed in a solution agitated with a magnetic stir bar. Cleaning lasted for 5 minutes and was followed by a 30 second rinse with tap water at 120 F. Drying was performed with a Master Appliance Corp, Hot-air gun model HG-301A for one minute at 500 F. Coupons were weighed a final time and cleaning efficiencies were calculated.
SUBSTRATE MATERIAL: Aluminum Coupons
CONTAMINANTS: Elf Lubricant North America Elf Cut 51 (64742-53-6, 64742-52-5, 63449-39-8,8016-28-2) CONTAMINATING PROCESS USED: Lubricant applied using hand held swab
Trial Results:
Four cleaners (Heatbath, Today & Beyond, United Laboratories and W.R. Grace) removed over 95% of the oil from the coupons. All but one cleaner averaged over 80% removal of the Elf Cut 51 oil. United Laboratories had the highest efficiency, 99.7%. Table 2 lists the calculated data for the eight cleaners.
Table 2. Calculated Cleaning Effectiveness
Cleaners
AW Chesterton
Buckeye
Heatbath
Savogran
T&B
United
W.R. Grace
Watson
Coupon 1
93.15
81.3
98.72
92.92
97.87
99.51
96.22
78.28
Coupon 2
65.22
84.96
93.48
77.91
96.77
99.81
96.54
85.27
Coupon 3
67.57
79.89
97.62
94.44
99.1
99.81
93.12
89.1
Average
75.31
82.05
96.61
88.43
97.91
99.71
95.29
84.22
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
The four cleaners above 95% removal will be used in the next phase of testing which will use ultrasonic energy. The contaminant will switch to the Cello-Seal.
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