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Trial Number 3

Trial Purpose:

Solve problem of the spottin from the last trial

Date Run:

08/07/1995

Experiment Procedure:

Trials #1 and #2 will use the Oakite Inproclean #3800 in a stirbar aggitated beaker and the Crest ultrasonic unit respectively. Trials #3 and #4 will use the Sky Products cleaner #10 in a stirbar aggitated beaker and the Crest ultrasonic unit respectively.
All cleaners and cleaning methods will use the same times and temperatures. Cleaning will take place for 15 minutes at 130 F. Rinsing will be done in a tank of tap water set at 130 F for two minutes. A second rinse in a DI water bath will be performed for one minute at room temperature. During rinsing the tubes will be aggitated quite a bit to make sure they fill up with water. The parts will then be dried under air knives for one minute and then in a convection oven set at 170 F for thirty minutes. For all cleanings and rinsings the tubes will be positioned that the hole side is facing up at a 25 degree angle. If needed the tubes will be aggitated enough so that they completely fill up with cleaner or water.
After cleaning the parts will be allowed to cool down and visually inspected for any residual oil. The parts will then be packed away for when Stamping Company arrives on Tuesday.

CLEANING CONDITIONS:

 

 

 

 

time (min)

 

 

  trial #1

 

  Temperature    trial #2   trial #3

 

        trial #4

 

 

Stirbar aggitation

 

15

 

138

 

 

 

134

 

 

 

Ultrasonics

 

15

 

 

 

134

 

 

 

135

 

RINSE/TAP H2O

 

2

 

128

 

128

 

128

 

132

 

RINSE/DI H2O

 

1

 

76

 

76

 

76

 

76

 

DRY air knives

 

2

 

room

 

room

 

room

 

room

 

DRY convection oven

 

30

 

172

 

165

 

169

 

171

Trial Results:

Parts look very clean on the outside, the ultrasonics more than the agitated immersion.  The results for the swab test was the same as Friday's trial.

Success Rating:

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

Conclusion:

It seems that the Deionized rinse has solved the problem of the spotting.

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