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Yellow Stains On Nickel Plated Strips

2004

I have some plating problems in surfacing nickel on High Carbon Steel Strips (5.5x0.30mm)

Somtimes we encounter yellowish stains or yellow deposits on the surface after drying in a centrifugal drier. 98% of production comes very clean, but the remaining 2% needs to be rewashed and only then the yellow stains are gone. This process hampers our production severely.

Please can you guide me to a solution as to what or where we may be going wrong?

Thanks

Nauzad Mun
- Mumbai, MAH, INDIA

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Use better rinsing before the dryer and consider a lower temp (longer drying period is a negative result) drying.

James Watts
- Navarre, Florida
2004

Add antipit at 2 ml/ltr. liquid in the last rinse prior to drying.

N.K.Praveen Kumar
- Secunderabad, India
2004

adv.