Trial Purpose:
To evaluate possible replacement cleaners for NPB in solder cleaning from electronics
Date Run:
08/07/2002Experiment 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 handheld 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 efficiencies 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 decrease to 2 minutes. All other parameters will be kept the same.
