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Determine chemistry and process
The purpose of this trial is to determine a chemistry and mechanical method that would be suitable for Plating Company needs.
WR Grace Daraclean 235 was chosen due to the fact that it was neautral (pH=7.1), contained no silicates, and it has worked for us before. Cleaning will be done in an air sparged beaker for 10 minutes at 140o F. The part was then rinsed in a tap water tank for 2 minutes at 150 F, and then rinsed for 2 minutes in a DI water rinse at 120o F. Drying was done under air knives for 2 minutes, under a heat gun for 2 minutes and finally in a convection oven for 10 minutes (160 F).
It was obvious that the air sparging was ineffective in removing the contaminants from the parts, so the part was cleaned using ultrasonics next. The same basic operating parameters were used for the air sparging was also used for the ultrasonics.
The part seemed alot cleaner, although some oily residue remained. The part was examined using FTIR to detect any contamination. The part was then sent back to Plating Company to see if it would plate.
by the client.
Success Rating:Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Residual oil was notced on the part after both cleaings. We will see what Plating Company thinks about the clenliness of the part.
Part cleaned with Daraclean 235 was successfully plated without any additional cleaning.