The purpose of this experiment was to determine the effectiveness of alternatives with an added deionized water rinse step.
Date Run:
07/19/2021
Experiment Procedure:
Cleaners were prepared to the following concentrations: Citranox 2%, Mirachem 500 20%, Water Works Heavy Duty Degreaser 7:1, SC Aircraft & Metal 20%, Aquaease 732 5%, Aquavantage 3800 GD 5%. Three stainless steel coupons were obtained and weighed for each of the cleaners being tested. Coupons were then soiled with an oil provided by the company and a dirty weight was recorded. Coupons were submerged into their respective cleaners for 15 minutes at room temperature. After 15 minutes had passed coupons were rinsed in a deionized water bath for 30 seconds. Coupons were allowed to dry in air for 24 hours. Following the drying process, coupons were weighed again and a clean weight was recorded. Effectiveness of the cleaners was determined.
Trial Results:
Cleaner
Initial wt of cont.
Final wt of cont.
%Cont Removed
% AVG
Citranox
0.0135
0.0111
17.78
11.05
0.0102
0.0152
-49.02
0.0472
0.0168
64.41
Mirachem 500
0.0468
0.0173
63.03
68.38
0.0631
0.0168
73.38
0.0550
0.0172
68.73
Water Works
0.0435
0.0210
51.72
53.25
0.0349
0.0195
44.13
0.0565
0.0204
63.89
SC Aircraft & Metal
0.0904
0.0172
80.97
67.42
0.0481
0.0162
66.32
0.0353
0.0159
54.96
Aquaease 732
0.0777
0.0191
75.42
51.59
0.0494
0.0184
62.75
0.0235
0.0196
16.60
Aquavantage 3800 GD
0.0913
0.0154
83.13
70.57
0.0370
0.0179
51.62
0.0755
0.0174
76.95
All cleaners, with the exception of SC Aircraft & Metal, performed significantly worse with the added deionized water rinse step. Oil residues were visibly present on all coupons following the cleaning process. The decreased performance could be attributed to oil re-coating the coupon as they were being pulled from the water bath. Next steps would be to progress all cleaners to heated immersion and remove the deionized water bath for all cleaners except SC Aircraft & Metal.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Upon completion of testing, it was determined that almost all cleaners performed worse with the added deionized water rinse. The only cleaner to show improvements with the rinse was SC Aircraft & Metal. Next steps would be to progress all cleaners to heated immersion trials and remove the rinse step for all except SC Aircraft & Metal.
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