To evaluate the effectiveness of aqueous cleaners at the removal of gundrill oil/coolant from stainless steel alloy.
Date Run:
07/02/2019
Experiment Procedure:
Initial weights were obtained for nine 2”x2” stainless steel alloy coupons. All coupons were soiled with gundrill oil/coolant mixture on half of the coupon on one side. All coupons were reweighed to obtain a dirty weight. One set of three coupons was immersed in each of the three cleaners. Cleaners and coupons were placed in heated ultrasonic machine for 25 minutes. Coupons were removed from cleaners and rinsed with DI water by spraying each coupon five times. Coupons were air dried for one hour at room temperature (68 F).
Chemistries Evaluated:
Buckeye Immersion Cleaner
Alconox Powdered Precision Cleaner
Micro 90 Concentrated Cleaning Solution
Company Name
Product Name
Concentration
Temperature
Buckeye International
Buckeye Immersion Cleaner
20%
125 F
Alconox Inc.
Alconox Powdered Precision Cleaner
1%
100 F
International Products
Micro 90 Concentrated Cleaning Solution
2%
100 F
Trial Results:
All three cleaners were effective in removing gundrill oil/coolant from stainless steel alloy. The gravimetric data for Buckeye Immersion Cleaner shows that one coupon was significantly less clean than the other two, causing the average percent removal to be under 90% clean. However, visually, this cleaner worked well and has worked well in the past experiments. Buckeye Immersion cleaner had an average removal of 83.74%, Alconox had an average removal of 97.65% and Micro 90 had an average of 94.57%.
Cleaner
Initial Weight of Cont.
Final Weight of Cont.
% Removed
Average
1
0.0042
0.0001
97.62
83.74
0.0022
0.0004
81.82
0.0039
0.0011
71.79
2
0.0048
0.0000
100.00
97.65
0.0062
0.0003
95.16
0.0045
0.0001
97.78
3
0.0050
0.0001
98.00
94.57
0.0097
0.0007
92.78
0.0085
0.0006
92.94
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 cleaners were effective for the removal of oil/coolant on stainless steel coupons. Spray rinsing with deionized water was very effective in removing any chemical residue from the cleaners.
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