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Trial Number 0

Client Number 444

Project Number 1

Trial Purpose:

The purpose of this experiment was to determine the effectiveness of alternative cleaners on removing soil via unheated immersion.

Date Run:

01/08/2021

Experiment Procedure:

Cleaners were prepared to the following concentrations: Metalnox 6386 100%, Dimethyl Glutarate 100%, Ozzy Juice SW-3 100%, SC Aircraft & Metal Cleaner 20%, SC Supersolve 20%, Crystal Simple Green Industrial Cleaner 30 parts water. Three aluminum coupons were obtained and weighed for each of the cleaners being tested. Coupons were then soiled with V-4B oil 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 dried in air for 24 hours. Once dry, 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
Metalnox 6386 0.0079 -0.0014 117.72 103.16%
0.0069 0.0001 98.55
0.0059 0.0004 93.22
Dimethyl Glutarate 0.0072 -0.0009 112.5 110.88%
0.0062 -0.0008 112.9
0.0083 -0.0006 107.23
Ozzy Juice SW-3 0.0062 0.0037 40.32 55.39%
0.0108 0.0031 71.3
0.0066 0.003 54.55
SC Aircraft & Metal 0.0064 0.0016 75 68.33%
0.005 0.001 80
0.0046 0.0023 50
SC Supersolve 0.0039 0.0038 2.56 32.93%
0.0047 0.0034 27.66
0.0035 0.0011 68.57
Crystal Simple Green Industrial 0.0027 0.0002 92.59 103.07%
0.0041 0.0006 85.36
0.0032 -0.001 131.25

Dimethyl Glutarate was the most effective cleaner removing an average of 110.88% of soil from aluminum coupons. Metalnox 6386 was the second most effective removing 103.16% followed closely by Crystal Simple Green removing 103.07%. After 24 hours of drying, coupons cleaned with Dimethyl Glutarate still had solvent left behind, so additional time was allowed for a complete dry. The excess solvent most likely removed existing soil above the cleaned area adding to the excess soil removal. An improvement to the experiment would be to include an additional drying step, most likely a heat gun, for Dimethyl Glutarate to fully dry. Excess existing soil was also removed from Metalnox and Crystal Simple coupons adding to the increased removals.

For the remaining cleaners, although there was no visible oil residue after the cleaning process, removal was very poor. Removal could be increased by adding heat starting at 100°F. The SC products may benefit from a rinse step with deionized, as this has aided in previous experiments as well.

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 Dimethyl Glutarate was the most effective cleaner followed by Metalnox 6386 and Crystal Simple Green Industrial. Next steps would be to conduct heated immersion to improve removal for remaining cleaners. A retest of unheated immersion to verify top cleaner performance without any preexisting soils would also be beneficial. A heat gun dry step is necessary for Dimethyl Glutarate to dry in a timely fashion.

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