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Trial Number 2

Trial Purpose:

Determine the effectiveness of ultrasonics

Date Run:

08/01/1995

Experiment Procedure:

Cleaning was done in beaker ultrasonics set at 150 F. Cleaning time will be determined during the trial depending on the cleaner's effectiveness. Two glass samples will be used for each cleaner. The samples will be rinsed in a tap water bath for 1 minute at 150 F and then in a DI water rinse for 1 minute at room temperature. The parts will then be dried under an air knife for 1 minute and then in a convection oven set at 120 F for 30 minutes.
The samples will be analyzed gravimetrically to get a percent removal. The samples will be observed with a waterbreak test to detect any residual wax. After drying, the samples will be checked for any water spotting that may occur.
Trial #1-
SAMPLE NUMBERS: #1, #2
CLEANING PRODUCT: Alconox Alcojet Detergent
CONCENTRATION: 2% solution (20 grams per liter solution)

Trial #2-
SAMPLE NUMBERS: #3, #4
CLEANING PRODUCT: International Products Micro
CONCENTRATION: 4% by volume

Trial #3-
SAMPLE NUMBERS: #5, #6
CLEANING PRODUCT: Oakite Inproclean #3800
CONCENTRATION: 10% by volume

Trial #4-
SAMPLE NUMBERS: #7, #8
CLEANING PRODUCT: Innovative Organics L-12 cleaner
CONCENTRATION: 10% by volume

Trial Results:

After cooling down, all the cleaners were ranked in three categories; Wax Removal, Wax Separation and Spotting.  A number of one to four was assigned for each cleaner's performance, one being the best performer and four being the worst.

 

 

 

Percent Removal

 

Wax Separation

 

Spotting

 

Alcojet

 

1

 

2

 

1

 

Micro

 

3

 

1

 

3

 

Inproclean #3800

 

2

 

2

 

1

 

L-12

 

4

 

4

 

4

The Innovative Organics L-12 cleaner also had the problem of redeposition during the trial. The wax would be removed and float up on the surface, after a while, the glob of wax would sink in the solution and cling to the glass surface again.

GRAVIMETRIC ANALYSIS

sample # clean mass (g) mass with contamination (g) mass after cleaning (g) contaminant removed (g) Percent Removal
1 14.8772 17.5155 14.8765 2.639 100.03%
2 16.5516 19.2710 16.5513 2.7197 100.01%
3 12.3678 14.6132 12.3680 2.2452 99.99%
4 14.3587 16.9307 14.3591 2.5716 99.98%
5 15.0665 18.0461 15.0665 2.9796 100.00%
6 13.3553 16.2423 13.3550 2.8873 100.01%
7 14.0972 17.3542 14.2524 3.1018 5.23%
8 15.7449 19.4233 15.8566 3.5667 96.96%

1,2 - Alconox Alcojet
3,4 - International Products Group Micro
5,6 - Oakite Inproclean #3800
7,8 - Innovative Organics L-12

Success Rating:

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

Conclusion:

Immersion: The stirbar agitation appeared to provide sufficient energy for cleaning. The Alcojet and the Oakite Inproclean #3800 were both very sucessful in cleaning the glass samples. Brushing should also be considered to ensure cleanliness (International Products Micro cleaner was successful when brushing was applied).

Ultrasonics: The ultrasonics was successful for all cleaners except the Innovative Organics L-12 cleaner. Results suggest that a lower cleaning temperature can be used as opposed to aggitated immersion. The ultrasonics also provided a better separation of wax from the cleaner solution.

Rinsing: The rinsing procedures used were sucessful in removing residual cleaner from the glass and leaving a spot free surface after drying. A final rinse of cold running DI water may be appropriate (some residual cleaning solution was noticed on the samples when rinsed in a still bath
of DI water).

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