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Trial Number 0

Trial Purpose:

To evaluate possible replacement cleaners for NPB in solder cleaning from electronics

Date Run:

08/07/2002

Experiment Procedure:

Eight products were selected from the laboratories database based on client information and past successful testing. The solutions were used at 68 F. The four semi-aqueous products were used at full strength and the aqueous based products were diluted to 10% in 600 ml beakers using DI water.
Twenty four preweighed coupons were coated with Alpha Metals 615 Flux (67-63-0, 8052-41-3, 8050-09-7) using a hand held swab and allowed to dry. Coupons were then reweighed. Three coupons were cleaned in each solution for 5 minutes using stir-bar agitation, then rinsed in tap water at 68 F for 15 seconds followed by an air knife drying for 30 seconds. Once dry, final weights were recorded and efficiencies were calculated.

Trial Results:

Five of the eight cleaners removed over 90% of the flux from the aluminum coupons using stir-bar agitation. Two removed between 85-90% and only Ozzy Juice SW 3 had difficulty removing the flux.  Table 1 below lists the calculated efficiences for each coupon cleaned.

Table 1. Calculated Efficiencies

Cleaner Initial wt of cont. Final wt of cont. %Cont Removed
Bio T Max 0.0264 0.0017 93.56
  0.0613 0.0010 98.37
  0.0794 0.0008 98.99
DBE 3 0.0983 0.0048 95.12
  0.1131 0.0124 89.04
  0.1167 0.0190 83.72
DS 108 0.0706 -0.0002 100.28
  0.1416 0.0011 99.22
  0.1045 -0.0006 100.57
Ionox HC 2 0.1485 0.0067 95.49
  0.0848 0.0022 97.41
  0.1057 0.0009 99.15
Ozzy Juice SW3 0.1283 0.1186 7.56
  0.0837 0.0774 7.53
  0.1571 0.1527 2.80
Armakleen E 2002 0.1277 0.0368 71.18
  0.1163 0.0142 87.79
  0.0778 0.0057 92.67
SWR One 0.1108 -0.0004 100.36
  0.1123 -0.0005 100.45
  0.0846 -0.0008 100.95
Beyond 2005 0.0911 -0.0001 100.11
  0.1300 0.0004 99.69
  0.1038 -0.0008 100.77

Success Rating:

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

Conclusion:

The top five cleaners will be used in the next trial using ultrasonic energy.  Cleaning times will decreased to 2 minutes.  All other parameters will be kept the same.

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