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Trial Number 1

Trial Purpose:

Find chemistry that meets clients needs

Date Run:

10/04/1995

Experiment Procedure:

This rial will test five different cleaning chemistries against the Calgon Geo-Guard 2215 (the most effective cleaner tested to date).
The five cleaners selected were Gemtek SC1000 (5%), Abatement Tech. Bio-Might (5%), Valtech Valtron SP2275 (4%), Valtech Valtron SP2001 (4%) and CSI Release (5%). All cleaners will be compared to a 5% solution of Calgon. For each cleaner, 3 silver plated coupons will be cleaned for a total of 18 coupons.
Cleaning will be performed at 126-140 F for ten minutes in a beaker agitated with a stir-bar. Identical stir-bar settings will be used on all cleaning solutions to ensure that all parts receive equal agitation. For each set of three coupons, two were rinsed in a tap water bath, while the third was rinsed in a DI water bath. Both rinses were for one minute and at 140 F.
All coupons were weighed before and after contamination and after drying to obtain a percentage removal. The coupons were also visually inspected for any films that might have remained from ineffective rinsing.

Trial Results:

Cleaning Solution: 5% solution of Abatement Technologies Bio Might 100.
Cleaning Temperature (F): 127
Tap Water Rinse Temperature (F): 140
DI Water Rinse Temperature (F): 138
GRAVIMETRIC ANALYSIS

sample # /      clean mass mass with mass after     contaminant    Percent
substrate               (g)             cont (g)        cleaning (g)     removed (g)    Removal
8641 36.0927 36.1138 36.0919 0.0219 103.79%
9039 36.1334 36.176 36.1337 0.0423 99.30
0268*             36.2572 36.2904 36.257 0.0334 100.60%
Average                101.23%
StDev.                      2.31%
Cleaning Solution: 5% Solution of Gemtek SC1000
Cleaning Temperature (F): 128
Tap Water Rinse Temperature (F): 145
DI Water Rinse Temperature (F): 140
GRAVIMENTRIC ANALYSIS          
sample # /      clean mass mass with mass after   contaminant    Percent
substrate              (g) cont (g) cleaning (g) removed (g) Removal
6169 35.8442 35.8708 35.8451 0.0257 96.62%
9477 36.1767 36.2059 36.1782 0.0277 94.86%
0920*             36.3223 36.3722 36.3256 0.0466 93.39%
Average                 94.96%
StDev.                     1.62%
Cleaning Solution: 5% solution of Cleaning Systems Inc. Release
Cleaning Temperature (F): 136
Tap Water Rinse Temperature (F): 144
DI Water Rinse Temperature (F): 138
GRAVIMETRIC ANALYSIS
sample # /      clean mass mass with mass after contaminant    Percent
substrate              (g) cont (g) cleaning (g) removed (g) Removal
8803 36.1093 36.1384 36.1095 0.0289 99.31%
7634 35.992 36.0519 35.9916 0.0603 100.67%
9967*              36.2262 36.2621 36.2264 0.0357 99.44%
Average                  99.81%
StDev.                     0.75%
Cleaning Solution:4% Solution of Valtech Valtron SP 2275
Cleaning Temperature (F): 137
Tap Water Rinse Temperature (F): 142
DI Water Rinse Temperature (F): 141
GRAVIMETRIC ANALYSIS
sample # /      clean mass mass with mass after contaminant Percent
substrate              (g) cont (g) cleaning (g) removed (g) Removal
8345 36.0630 36.0928 36.0645 0.0283 96.92%
6257 35.8533 35.8768 35.8532 0.0236 100.43%
7133*              35.9418 35.9667 35.9419 0.0248 99.60%
Average                  98.98%
StDev.                     1.83%
           
Cleaning Solution: Calgon Geo-Guard #2215
Cleaning Temperature (F): 139
Tap Water Rinse Temperature (F): 140
DI Water Rinse Temperature (F): 139
GRAVIMETRIC ANALYSIS
sample # clean mass mass with mass after contaminant  Percent
substrate              (g) cont (g) cleaning (g) removed (g) Removal
8385 36.0679 36.0965 36.0676 0.0289 101.05%
8840 36.1134 36.1451 36.1130 0.0321 101.26%
6968*              35.9251 35.9422 35.9242 0.0180 105.26%
Average                102.52%
StDev.                       2.37%
Cleaning Solution: Valtech Valtron 2201
Cleaning Temperature (F): 146
Tap Water Rinse Temperature (F): 142
DI Water Rinse Temperature (F): 138
GRAVIMETRIC ANALYSIS
sample # / clean mass mass with mass after contaminant Percent
substrate (g)   cont (g) cleaning (g) removed (g) Removal
9854 36.2155 36.2550 36.2153 0.0397 100.51%
6643 35.8927 35.9254 35.8918 0.0336 102.75%
8028*               36.0314 36.0491 36.0307 0.0184 103.95%
Average                 102.40%
StDev.                      1.75%

Success Rating:

Test incomplete or inconclusive.

Conclusion:

The Abatement Bio-Might 100 performed identical to the Geo-Guard 2215. The only drawback was the foam generation in the cleaning bath. All other cleaners were ineffective in removing the buffing compound, especially from the lettering on the coupons.
All tap water rinses came out with a yellowish residue. Usually water spotting from hard water agents shows up as a white film. This film could be the result of the rinse bath being contaminated with an excessive amount of buffing compound. Tap water rinse may be successful if performed in a two stage method. The deionized bath was very effective in performing a clean rinse.
Future testing will be done on some new cleaners that will be arriving in the lab in the near future (Calgon AK-6015, Matchless MC132 and MC 580). A multistage rinsing technique will also be tested out.

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