To evaluate successful cleaners from previous trials on second contaminant
Date Run:
09/15/2003
Experiment Procedure:
The eight products from the first trial were used again in this trial. Six products were used at full strength and two were products (Oakite Products and Gemtek Products) were used at 10%, diluted with DI water. Six products were used at room temperature and two products (Metabolix and Gemtek) were used at 120 F based on success from previous trial. Clean took place in 250 ml beakers with no agitation. The process utilized no water rinse and only used compressed air to dry/rinse the parts. Twenty-four preweighed steel coupons were coated with Rochester Midland Corp RI 780 (8052-41-3, 95-63-6) using a hand held swab. The coating then heated with a Master Appliance Heat gun at 300 F for 10 minutes. After cooling to room temperature, a second weighing was performed to determine the amount of soil that was added. Three coupons were cleaned in each solution for 5 minutes with no agitation. After drying with the air blow off, coupons were weighed a final time to determine the cleaning efficiencies of each product.
Trial Results:
All eight products removed over 88% of the coating from the steel coupons. Five removed over 92% of the coating. Solvent Kleene D Greeze 1000 was the most successful, removing 100% of the rust preventative in the five minutes of cleaning. The table below lists the amount of soil added and remaining for each coupon cleaned.
Cleaner
Initial wt
Final wt
% Removed
AK 225
0.0544
-0.0001
100.18
0.0152
0.0014
90.79
0.0180
0.0007
96.11
DS 108
0.0250
0.0005
98.00
0.0115
0.0011
90.43
0.0242
0.0023
90.50
Beyond 2008
0.0334
0.0037
88.92
0.0085
0.0006
92.94
0.0097
0.0017
82.47
D Greeze 1000
0.0070
-0.0001
101.43
0.0108
0.0002
98.15
0.0156
-0.0002
101.28
278 Super Solv
0.0130
0.0009
93.08
0.0282
0.0012
95.74
0.0165
0.0018
89.09
Inproclean 3800
0.0161
0.0016
90.06
0.0313
0.0023
92.65
0.0379
0.0057
84.96
E3HB
0.0305
0.0003
99.02
0.0129
0.0004
96.90
0.0215
0.0025
88.37
SC Aircraft & Metal Cleaner
0.0155
0.0002
98.71
0.0093
0.0005
94.62
0.0089
0.0003
96.63
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Increasing cleaning time may improve the efficiencies of the cleaners. A follow up trial will be conducted for the products with less than 95% efficiency.
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