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Trial Number 5

Client Number 514

Project Number 2

Trial Purpose:

To evaluate the effectiveness of the previously identified successful solvents utilizing methods other than ultrasonics.

Date Run:

10/05/2023

Experiment Procedure:

Four solvents were chosen using previous testing data on their performance for removing other waxes and greases.  Three pre weighed aluminum coupons were assigned to each solvent for each substrate for a total of 12 aluminum coupons. The coupons were soiled with the glyconol wax soil (about 0.5 grams) by placing a small ball of wax onto the bottom third of the coupon, heating it with a heat gun to melt the wax, and then spreading the wax into a strip across the bottom third of the coupons.  After soiling, the dirty weights of the coupons were recorded.  The coupons were then subjected to 20 mins of unheated immersion with a stir bar set at 300 rpm in their respective cleaners.  The coupons were left to air dry overnight before the clean weights were recorded.

Trial Results:

Cleaner Initial wt of cont. Final wt of cont. %Cont Removed % AVG
1-Propanol 0.0610 0.0002 99.67 99.56
0.0561 0.0003 99.47
0.0448 0.0002 99.55
Thiophene 0.0774 0.0001 99.87 99.69
0.0663 0.0003 99.55
0.0576 0.0002 99.65
1-Butanol 0.0457 0.0016 96.50 91.53
0.0518 0.0014 97.30
0.0890 0.0171 80.79
Dowanol PnBGE 0.0245 0.0023 90.61 71.68
0.0549 0.0142 74.13
0.0819 0.0407 50.31

Although 1-Propanol, and 1-Butanol removed a high percentage of the wax soil, some wax visibly remained on the coupons after cleaning.  Coupon cleaned with Thiophene were completely void of any remaining wax.

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

1-Propnaol and 1-Butanol are somewhat effective cleaners in removing the wax soil using unheated immersion methods.  Thiophene is a very effective cleaner in removing the wax soil using unheated immersion methods.  Dowanol PnBGE is not an effective cleaner in removing the wax soil using unheated immersion methods.

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