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Trial Number 1

Trial Purpose:

To evaluate cleaners on supplied parts under operating conditions

Date Run:

02/21/2002

Experiment Procedure:

Cleaners from previous trial were selected for testing. Each was diluted to 5% using DI water in 600 ml beakers. Water was used as a control. The solutions were heated to 140 F in a Crest 25 kHz ultrasonic tank.
Four, 3 inch pieces of silver tape were cut from the supplied materials. Optically Stimulated Electron Emission (OSEE) readings were recorded to establish a baseline. Then 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. Next, each piece of tape was cleaned in a solution for two 1 second intervals and rinsed in a ultrasonic DI water bath for 1 second. Parts were dried for 10 second using a heat gun at 500 F. Final OSEE readings were recorded and compared to the dirty and baseline levels to determine cleanliness.

Trial Results:

The average OSEE readings measured for the each initial set was found to be 914. The average dirty reading was found to be 410. Comparing the final readings for each of the cleaners revealed that only one cleaner was completely successful in removing the oil, Oakite Inproclean 3800. Three others had readings in the 700 and one had a reading just above the average dirty reading. The following table lists the readings for each cleaner.

Cleaner   Reading 1 Reading 2 Reading 3 Reading 4 Reading 5 Reading 6 Average
BCS Initial 965 975 977 973 978 979 974.50
  Dirty 524 305 322 251 524 370 382.67
  Clean 567 878 497 540 959 849 715.00
Brulin Initial 978 930 974 979 978 972 968.50
  Dirty 583 378 508 431 713 332 490.83
  Clean 959 958 687 368 897 241 685.00
Houghton Initial 979 978 830 968 896 973 937.33
  Dirty 444 453 696 783 862 543 630.17
  Clean 785 964 154 264 331 388 481.00
Oakite Initial 881 800 618 939 972 967 862.83
  Dirty 669 241 735 541 378 377 490.17
  Clean 966 945 968 964 802 967 935.33
Sunshine Initial 978 968 971 964 956 966 967.17
  Dirty 378 118 755 279 246 169 324.17
  Clean 963 962 302 527 968 966 781.33
Today Initial 578 702 647 822 974 927 775.00
  Dirty 91 157 81 63 343 102 139.50
  Clean 957 967 459 964 960 466 795.50

Success Rating:

A follow up test, usually based on company input.

Conclusion:

The Oakite product was the only one to work under these conditions.  The three products with OSEE readings in the 700's (BCS, Sunshine Makers and Today & Beyond) would probably work with an additional 2 seconds of cleaning.  The six pieces have been sent back for further analysis.

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