
plating, anodizing, & finishing Q&As since 1989
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Light blue clouds on electroless Ni-surface
2006
Hello,
we see (at 20x magnification) on our electroless Ni-surface (high-P on steel or sulphamate_ni/steel) sometimes light blue 'clouds' or stains on the surface. The parts were rinsed three times after the Ni-bath (last rinse < 5µS) and then dried in centrifugal dryer with hot air (60-80 °C).
Can anyone explain these 'clouds' and how can I avoid these clouds, or clean this surface?
2006
Your first rinse has to be slightly alkaline (around pH 8) to neutralize the adhered film of plating solution over your parts' surface. NaOH or ammonia [adv: item on eBay & Amazon] in small amount work for us.
Guillermo MarrufoQ, A, or Comment on THIS thread -or- Start a NEW Thread