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Trial Number 7

Trial Purpose:

To test the removal of grease from aluminum coupons using 30 minutes heated immersion.

Date Run:

02/18/2021

Experiment Procedure:

A solution of 1:15 parts was created for Green clean, a 50% solution was created for Water Works and Dimethyl Glutarate was used at 100%. Three aluminum coupons per cleaner were pre-weighed for initial weights. They were then soiled 1/3 of the way with black grease that was given to us by the company and were weighed for dirty weights. The solutions were all heated on the hot plate till they reached 105 degrees Fahrenheit. Three coupons per cleaner were placed in the solutions and immersed for 30 minutes. They were then left to dry for over an hour and final weights were taken. 

Cleaners Used:

  • Dimethyl Glutarate 100%
  • Green Clean 1:15
  • Water Works 50% 

Trial Results:

None of the cleaners were effective for the removal of grease from aluminum coupons. Dimethyl Glutarate had the highest at 20% removal but visually the coupons remained dirty with the soil. Green Clean had an average of 3% removal and the cleaner left a line on the aluminum substrate. Lastly, Water Works had an average of 9% removal and visually looked the cleanest but lots of contaminant was left on the coupons. 

Cleaner initial wt of cont final wt of cont cont removal average
1 0.173 0.1406 18.73 20.78
0.1555 0.1161 25.34
0.1012 0.0827 18.28
2 0.2001 0.194 3.05 3.36
0.1264 0.1229 2.77
0.1195 0.1144 4.27
3 0.1092 0.0976 10.62 9.74
0.1097 0.0952 13.22
0.1467 0.1388 5.39

Success Rating:

Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.

Conclusion:

Additional testing needs to be done. Increasing the temperature of the cleaners and adding agitation to the cleaners are the next steps. Re-test Dimethyl Glutarate and Water Works adding both those variables. 

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