To identify best way to rinse parts after cleaning with aqueous product in ultrasonic cleaning.
Date Run:
10/19/2006
Experiment 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.
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