Trial Purpose:
Grace Daraclean 294xx vs 283 in removing wax
Date Run:
06/01/1995Experiment Procedure:
The coupons were weighed prior to contamination and then dipped in melted wax. Once the wax hardened the coupons were then weighed again. Cleaning was done in a beaker at 160 F with air sparging used as agitation. The copper coupons were washed for 15 minutes but it was noted that a longer cleaning time was necessary, so the time was bumped up to 20 minutes. The coupons were then rinsed for 5 minutes in a tap water rinse at 160 F. Drying was performed by running the coupons under air knives for two minutes and then placing the coupons in a convection oven set at 125 F for 90 minutes. The coupons were then left out overnight to cool down and then weighed in the morning. Four runs were performed for the Daraclean 283 (one run for each substrate).
Trial Results:
EXPERIMENTAL DATA LOG
GRAVIMENTRIC ANALYSIS
| sample # and substrate | clean mass (g) | mass with contamination (g) | mass after cleaning (g) | contaminant removed (g) | Percent Removal |
| #8 Aluminum | 21.0186 | 21.8746 | 21.0205 | 0.8541 | 99.78% |
| #9 Aluminum | 21.0070 | 21.8466 | 21.0193 | 0.8273 | 98.54% |
| #10 Aluminum | 20.9878 | 21.7173 | 20.9955 | 0.7218 | 98.94% |
| #2954 Copper | 35.2962 | 36.0450 | 35.3054 | 0.7396 | 98.77% |
| #3093 Copper | 35.3100 | 36.0492 | 35.3125 | 0.7367 | 99.66% |
| #3932 Copper | 35.3942 | 36.0962 | 35.4075 | 0.6887 | 98.11% |
| #5330 Brass | 34.5341 | 35.2604 | 34.5357 | 0.7247 | 99.78% |
| #7399 Brass | 34.7371 | 35.4442 | 34.7422 | 0.702 | 99.28% |
| #5881 Brass | 34.5893 | 35.2998 | 34.5928 | 0.707 | 99.51% |
| #15 Steel | 163.8808 | 165.0326 | 163.8844 | 1.1482 | 99.69% |
| #11 Steel | 139.7609 | 141.0213 | 139.7640 | 1.2573 | 99.75% |
| #36 Steel | 147.5389 | 148.6627 | 147.5427 | 1.12 | 99.66% |
For the first run the Daraclean 283 removed a majority of the wax, however there was a thin film of wax on the copper coupons. Thus the cleaning time was bumped up to 20 minutes. Removal was pretty good (except for the Aluminum which had a lot of wax on it), but not as good as the Daraclean 294xx.
Success Rating:
Test incomplete or inconclusive.Conclusion:
A higher temperature would probably be the best bet to improve cleaning but this might not be a good idea due to safety reasons. A method needs to be devised to remove the wax from the top of the cleaning tank.
