Trial Purpose:
To identify best way to rinse parts after cleaning with aqueous product in ultrasonic cleaning.
Date Run:
10/19/2006Experiment Procedure:
Two products were selected from the lab's database of testing results. Products were selected based on contaminant removal and substrate compatibility. Both products were diluted to 5% using DI water and heated to 130 F by immersing beakers into a Branson 3510 ultrasonic tank filled with water. Solutions were de-gassed for 5 minutes.
Parts were placed into a basket and immersed into each solution and cleaned using 40 kHz ultrasonic energy for 5 minutes. After cleaning, a set of parts were removed from the cleaning and were not rinsed. These parts were dried using compressed air at room temperature for 30 seconds. Observations were made following drying. A second set of parts were rinsed in a single tap water bath at 130 F for 20 seconds, followed by the air drying and analysis. A final set were rinsed in three tap water baths, each at 20 seconds and 130 F. Drying and analysis were the same as before.
Trial Results:
One of the two cleaners cleaned better and did not cause oxidation after sitting at room temperature following drying. Observations are listed in the table below.
| Cleaner | Part Description | Rinse Method | Observations |
| Detergent 8 | Brass and Steel lighter | No rinse | Residue, parts not clean |
| 1 rinse | Less residue than 0 rinse | ||
| 3 rinse | Free of residue; may have some oxidation occurring | ||
| Polyspray Jet | Steel Eagles | No rinse | No visible residue |
| 1 rinse | Clean and no residue | ||
| Brass and Steel lighter | 3 rinse | Looked clean, no residue, no oxidation |
Success Rating:
Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.Conclusion:
The multi-stage rinsing with Polyspray Jet 790 XS looked to clean the best and leave the least residue behind.
