The purpose of this experiment was to confirm removal results from Trial #8.
Date Run:
09/14/2020
Experiment Procedure:
Three general steel TURI coupons were obtained for each of the four cleaners tested. The cleaners were prepared to the following conditions: Metalnox 6386 100% concentration room temperature, Mirachem 500 20% concentration 110°F, SC Aircraft & Metal Cleaner 20% concentration 130°F, and Shopmaster LPH 20% concentration 130°F. An initial weight was recorded for each coupon, then coupons were soiled with the Vanishing Oil provided by the company. A soiled weight was recorded and coupons were then submerged into their respective cleaners for 15 minutes. After 15 minutes had passed, cleaners were submerged into a deionized water bath at 115°F for 20 seconds. Coupons were then dried using the hot air gun and a cleaned weight was obtained. Effectiveness of cleaners was then determined.
Trial Results:
Cleaner
Initial wt of cont
Final wt of cont
%Cont Removed
%AVG
Metalnox 6386
0.0364
0.0032
91.21
92.87
0.0418
0.0059
85.89
0.0663
-0.0010
101.51
Mirachem 500
0.0612
0.0018
97.06
100.85
0.0526
-0.0015
102.85
0.0265
-0.0007
102.64
SC Aircraft & Metal Cleaner
0.0315
-0.0001
100.32
78.5
0.0232
-0.0006
102.57
0.0046
0.0031
32.61
Shopmaster LPH
0.0091
-0.0017
118.68
106.71
0.0400
-0.0028
107.00
0.0289
0.0016
94.46
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Shopmaster LPH was the most effective cleaner removing an average of 106.71% of soil from the steel coupons. Mirachem 500 was the second most effective removing an average of 100.85%, and Metalnox 6386 was the third most effective removing an average of 92.87. The next steps would be to test on company steel coupons.
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