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Trial Number 6

Client Number 142

Project Number 3

Trial Purpose:

The purpose of this experiment was to determine the effectiveness of alternatives in removing oil via heated immersion with a stir bar added to simulate agitation.

Date Run:

07/29/2021

Experiment Procedure:

Cleaners were prepared to the following concentrations: Citranox 2%, Mirachem 500 20%, Water Works Heavy Duty 7:1, SC Aircraft & Metal 20%, Aquaease 732 5%, Aquavantage 3800 GD 5%. All cleaners were heated to 110°F. A stir bar was added to each solution to simulate agitation. Three stainless steel coupons were obtained and weighed for each of the cleaners being tested. Company provided oil was then placed onto the coupons and a dirty weight was recorded. Once solutions reached the proper temperature, coupons were placed into their respective cleaners and heated immersion with agitation was conducted for 15 minutes. After 15 minutes had passed, all coupons were rinsed in a deionized bath at 110°F. Coupons were then dried 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 0.0401 0.0012 97.01 97.93
0.1249 0.0027 97.84
0.1147 0.0012 98.95
Mirachem 500 0.1213 0.0030 97.53 97.98
0.1080 0.0019 98.24
0.1366 0.0025 98.17
Water Works 0.1536 0.0006 99.61 99.58
0.1690 0.0002 99.88
0.1045 0.0008 99.23
SC Aircraft & Metal 0.2011 0.0031 98.46 97.44
0.1071 0.0037 96.55
0.1856 0.0050 97.31
Aquaease 732 0.1258 0.0079 93.72 92.14
0.1849 0.0088 95.24
0.0958 0.0120 87.47
Aquavantage 3800 GD 0.1563 0.0068 95.65 95.25
0.1272 0.0078 93.87
0.1489 0.0056 96.24

Water Works was the most effective cleaner removing an average of 99.58% of the soil from stainless steel substrates. It was visibly observed that coupons cleaned with Water Works possessed the least amount of post clean residue by far. Adding agitation to the process was extremely effective at increasing performance and decreasing the amount of residue present following the cleaning process. However, not all pockets of residue were removed, even on coupons cleaned with Water Works. Therefore, next steps will be to progress all cleaners to ultrasonic cleaning.

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 Water Works was the most effective cleaner removing an average of 99.58% of oil from stainless steel substrates. Incorporating agitation into the cleaning process has been the most successful method to reduce the amount of residue present after cleaning. However, there are still patches of residue present on all coupons. Next steps will be to progress all cleaners to ultrasonic cleaning.

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