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Letter 19002
Algae in copper rinse [New
York]
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I get a thick, algae-like growth on the walls of my dragout rinse
after electroless copper. I use air sparging and room temp city
water. Any suggestions?
Kevin Hatch
- Rochester, NY, USA
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You might clean out the tank and then try turning off the air
agitation. In a draqout rinse, there should be enough formaldehyde
from the bath present to prevent the biological growth, but it is
possible that it is being oxidized by the air agitation.
Alternatively, you could add a little formaldehyde.
Lyle Kirman
Kinetico Incorporated - Newbury, OH
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