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Trial Number 9

Trial Purpose:

Cleanliness analysis results for impeller shafts

Date Run:

10/10/1996

Experiment Procedure:

I just finished analyzing the impeller shafts that you sent me the other week.  The readings on this batch of parts seem to make a lot more sense than the previous readings.  Both the alcohol soak and the Dow Corning OS10 soak removed some of the contamination to a degree, but it still looks like the vapor degreaser does a much better job. 

Trial Results:

FTIR & OSEE RESULTS  
for C.R. Bard, Inc.    
Part Type Peak Height (% Transmittance) OSEE Average
1/* Precision Ball    
Dirty 0.0734 73.88
Vapor Degreased 0.0514 109.00
Alcohol Soak 0.0506 94.75
     
11 Fr. Spring    
Dirty  0.0690 119.90
Vapor Degreased 0.0508 177.10
Alcohol Soak 0.0385 145.70
     
J Pins    
Dirty 0.0356 83.57
Vapor Degreased 0.0309 131.57
Alcohol Soak 0.0000* 190.83
     
Short Pins    
Dirty 0.1500  
Vapor Degreased 0.0462  
Alcohol Soak 0.0484  
     
Impeller Plates    
Dirty 0.5930 276.90
Vapor Degreased 0.1610 458.90
Alcohol Soak 0.0556 561.75
Alcohol Soak & Wipe 0.0416 783.30
     
Impeller Shafts    
Dirty 0.0800 140.90
Passivated 0.0472 163.11
Passivated and Alcohol Soaked 0.9010 139.33
Vapor Degreased 0.0000* 191.30
Alcohol Soak 0.1000 112.25
Alcohol Soak & Wipe 0.0940 87.88
     
Impeller Shafts sent on 10/3**    
Dirty 0.3900 16.13
Vapor Degreased 0.0820 192.44
Alcohol Soak 0.1260 55.9
Dow Corning OS-10 Soak 0.1180 54.2
     
11 Fr. Stylet Wires recieved on 10/28***  
Dirty 0.07224  
Vapor Degreased 0.05232  
Wipe with Green Thunder 0.08385  
Alcohol wipe 0.05239  
     
* FTIR reading of 0 corresponds to no contamination remaining  
** Second set were measured with 6 drops of contaminated solvent instead of one
*** Fr wires were measured with 20 drops of contaminated solvent instead of one

Success Rating:

A cleanliness study, addressing only various analytical techniques.

Conclusion:

 If you have any questions, please do not hesitate to call.

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