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Trial Number 2

Client Number 79

Project Number 3

Trial Purpose:

Follow up experiment based on client input

Date Run:

02/28/2002

Experiment Procedure:

Four products that were moderately successful during previous trial were diluted to 5% using DI water in 600 ml beakers and heated to 140 F on a hot plate. Solutions were immersed in a Crest 25 kHz ultrasonic tank filled with water at 140 F and degassed for 5 minutes.

Five pieces of silver tape were precleaned in Oakite Inproclean 3800 for 5 minutes using the ultrasonic tank. Baseline OSEE readings were measured. Each piece of tape was thinly coated with Atofina Copperskin 510 metal working compound (CAS#s: 64742-52-5, 123-95-5, 8016-28-2, 8002-13-9) . The contaminant was applied with a hand held swab and then wiped with a second tissue to simulate the amount of contaminant present after the drawing process. A second set of readings were recorded to determine the effect of the drawing compound on the OSEE readings of the silver tape.

Each piece of tape was cleaned for 4 seconds in the ultrasonic tank, followed by a 1 second DI water rinse at 140 F also in the ultrasonic tank. Parts were dried using a Master Appliance heat gun at 500 F for 10 seconds. Final OSEE Readings were made and compared to initial baseline.

For any cleaner that does not successfully clean at 4 seconds, a follow up cleaning will be performed under the same conditions except for the cleaning time. An 8 second cleaning time will be used.

Trial Results:

Only one product, Crystal Simple Green, was successful in cleaning the silver tape in the 4 second cleaning.  All of the cleaners except the BCS product showed improvement from the two-1 second cleaning results from the previous trial.  After the 8 second cleaning, all of the products except the Houghton MTC-53 were effective at removing the lubricant from the tape.  The tables below show the OSEE readings for both cleaning times.

4 Second Cleaning        
Cleaner OSEE Reading 1 Reading 2 Reading 3 Average
  Baseline 978 992 976 982.00
BCS Dirty  38 42 98 59.33
  Final 393 810 394 532.33
  Baseline 981 989 991 987.00
Brulin Dirty  38 50 45 44.33
  Final 847 981 872 900.00
  Baseline 982 992 991 988.33
Houghton Dirty  123 43 55 73.67
  Final 966 652 988 868.67
  Baseline 987 780 987 918.00
Sunshine Dirty  26 32 51 36.33
  Final 978 978 971 975.67
  Baseline 976 978 375 776.33
Today Dirty  39 58 36 44.33
  Final 973 697 987 885.67
           
8 Second Cleaning        
Cleaner OSEE Reading 1 Reading 2 Reading 3 Average
  Baseline 968 980 983 977.00
BCS Dirty  56 62 30 49.33
  Final 980 982 978 980.00
  Baseline 974 974 978 975.33
Brulin Dirty  59 14 54 42.33
  Final 977 986 802 921.67
  Baseline 948 965 974 962.33
Houghton Dirty  32 53 65 50.00
  Final 582 766 175 507.67
  Baseline 987 979 978 981.33
Today Dirty  56 47 62 55.00
  Final 977 968 979 974.67

Success Rating:

A follow up test, usually based on company input.

Conclusion:

Cleaning for 8 seconds yielded the highest number of effective products. Only one product did not show improvement with the additional cleaning.

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