The purpose of this experiment was to determine the effectiveness of cleaners with the new rinse step added.
Date Run:
03/08/2021
Experiment Procedure:
Cleaners were prepared to the following concentrations: Dimethyl Glutarate 100%, Water Works Heavy Duty 7:1, Mirachem 500 20%, Citranox 2%. Three stainless steel coupons were obtained and weighed for each of the cleaners being tested. Coupons were then soiled with the lubricating 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 with a stir bar for agitation to reduce the reapplication of lubricant. As coupons were pulled from the rinse bath, a heat gun was used to blow away any potential lubricant upon removal from the water. Following the rinse process, coupons were dried with a heat gun and allowed to finish drying in air for 24 hours. After the drying period, coupons were weighed again and a clean weight was recorded. Effectiveness of the cleaners was then determined.
Trial Results:
Cleaner
Initial wt of cont
Final wt of cont
%Cont Removed
%AVG
Dimethyl Glutarate
0.0123
0.0010
91.87
96.1%
0.0680
0.0011
98.38
0.0774
0.0015
98.06
Water Works
0.0813
0.0048
94.09
95.15%
0.0898
0.0040
95.55
0.0669
0.0028
95.81
Mirachem 500
0.0889
0.0082
90.78
91.29%
0.0762
0.0065
91.47
0.1013
0.0085
91.61
Citranox
0.0974
0.0000
100.00
99.29%
0.0774
0.0013
98.32
0.0891
0.0004
99.55
Citranox was the most effective cleaner removing an average of 99.29% of the lubricant from stainless steel coupons. Although the rinse step did aid in removal of the lubricant, residue still formed following the cleaning and drying process on coupons cleaned with Water Works and Mirachem 500. As a result, these products will be dropped from further testing. Next steps would be to progress to parts testing with Metalnox 6386, Dimethyl Glutarate, and Citranox.
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 the rinse step was effective in improving removal rates for all cleaners. However, residue build-up still occurred on coupons cleaned with Water Works and Mirachem 500. Further testing will not be carried out with these products. Next steps will be to progress to parts testing with Metalnox 6386, Dimethyl Glutarate, and Citranox.
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