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Trial Number 2

Trial Purpose:

The purpose of this experiment was to determine the effectiveness of cleaners on the third company soil.

Date Run:

03/03/2021

Experiment Procedure:

Cleaners were prepared to the following concentrations: Metalnox 6386 100%, 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 a lubricating oil provided by the company and a dirty weight was recorded. Coupons were submerged into their respective cleaners at room temperature for 15 minutes. After 15 minutes had passed, coupons were dried with a heat gun at the ambient setting to remove excess solution and allowed to finish drying in air for 24 hours. Following the drying period, coupons were weighed again and a clean weight was recorded. Effectiveness of the coupons was determined.

Trial Results:

Cleaner Initial wt of cont Final wt of cont %Cont Removed %AVG
Metalnox 6386 0.0287 0.0002 99.30 100.07%
0.0625 0.0000 100.00
0.0217 -0.0002 100.92
Dimethyl Glutarate 0.056 0.0151 73.04 84.25%
0.0316 0.0054 82.91
0.0840 0.0027 96.79
Water Works 0.0351 0.0036 89.74 88.27%
0.0592 0.0070 88.18
0.0504 0.0066 86.90
Mirachem 500 0.0860 0.0138 83.95 86.81%
0.0387 0.0050 87.08
0.0867 0.0092 89.39
Citranox 0.0300 0.0037 87.67 92.02%
0.0756 0.0034 95.50
0.0577 0.0041 92.89

Metalnox 6386 was the most effective cleaner removing an average of 100.07% of the lubricating oil from stainless steel coupons. Citranox was the second most effective removing an average of 92.02%. After the cleaning and drying process, there appeared to be a slight oil residue present on coupons cleaned with both Water Works and Mirachem 500. Coupons cleaned with Citranox and Dimethyl Glutarate still appeared to be wet, but there was no oil residue remaining. This could be due to insufficient time under the heat gun. Next steps would be to progress Water Works and Mirachem 500 to heated immersion trials at 100°F. A retest of Citranox and Dimethyl Glutarate ensuring a full dry would also be beneficial. Metalnox 6386 has performed well for all company soils at room temperature and no further optimization is necessary.

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 Metalnox 6386 was the most effective cleaner in removing the lubricating oil from stainless steel coupons. Coupons cleaned with Dimethyl Glutarate and Citranox appeared to still be wet, but with no oil residue after the drying process. A retest of unheated immersion ensuring a full dry would be beneficial. Coupons cleaned with Water Works and Mirachem 500 possessed a slight oil residue. Progressing those cleaners to heated immersion could show improvement in removal.

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