Two client requested samples were diluted to 5% using DI water in 600 ml beakers. Solutions were heated to 125 F on a hot plate. Six preweighed coupons were coated with the Metalube Corp ML-119.2 dry lubricant (Molybdenum disulfide, graphite, silicates) using a hand held swab. Coupons were allowed to sit for 30 minutes and weighed again to determine the amount of lubricant applied. Three coupons were cleaned in each solution for five minutes using stir-bar agitation. Coupons were rinsed for 15 seconds in tap water at 120 F and dried using a Master Appliance Heat Gun for 30 seconds at 500 F. The coupons were then allowed to cool to room temperature and weighed a final time. Efficiencies were calculated for each product.
Trial Results:
Both solutions removed most of the lubricant through immersion cleaning only. The table below lists the amount of soil added and remaining for each coupon cleaned.
Cleaner
Initial wt
Final wt
% Removed
MD 6000 IM
0.0031
0.0004
87.10
0.0107
0.0003
97.20
0.0066
0.0000
100.00
SP 2500 IM
0.0101
0.0010
90.10
0.0142
0.0000
100.00
0.0149
0.0001
99.33
Success Rating:
A follow up test, usually based on company input.
Conclusion:
The same two cleaners will be used with ultrasonic cleaning.
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