To test Crystal Simple Green at a 1:15 concentration at 140 F for the removal of oil from stainless steel coupons.
Date Run:
12/06/2021
Experiment Procedure:
The cleaners were put into beakers and heated to 140 F in the ultrasonics tank. The coupons were weighed for dirty weights and once the cleaners were at the correct temperatures, the coupons were put into the beakers. The ultrasonics tank was turned on and ran for 15 minutes. The coupons were taken out and left to dry fully. Once dry, the clean weights were taken. The coupons were cleaned again till all remaining oil was removed from the coupons and the initial weights were taken. The ultrasonics tank was run at 40 KHz.
The coupons were all tested in the same solution to make sure soil loading wasn't an issue.
Trial Results:
This method was tested on six coupons and all six coupons had a removal of 90% or more. The first coupon was the lowest at 92% removal and the last coupon was the highest at 97% removal. Visually all the coupons were clean with minimal to no spotting. Pictures were sent to the company for their input on the first coupon.
Cleaner
Initial wt. of cont.
Final wt. of cont.
Average
Simple Green 1:15
0.2471
0.0204
91.74
0.1238
0.0031
97.50
0.1748
0.0043
97.54
0.2665
0.0040
98.50
0.2219
0.0080
96.39
0.1942
0.0044
97.73
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Crystal Simple Green 1:15 at 140 F is a potential alternative and visually removes all the soil from the stainless-steel coupons. Next steps would be to have the company test on parts. Additional next steps are to continue testing Mirachem 500 and other cleaners to find additional alternative choices.
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