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Rinsing Over Process Bath
Description
- Rinse the parts with fresh water over the heated process bath
- Use mist or spray rinsing nozzles, depending on the bath evaporation rate
- Use air-assisted mist/spray rinses, or squeegees for the minimum water use
Advantages
- Less contamination of rinse water, because less dragout is transferred on the part
- Misting has been shown to reduce drag-out by 50%
- Less process solution is lost
Limitations
Implementation Process
- Investigate required equipment / determine cost effectiveness
- rinse nozzles, water filter, switches, check valves
- maintenance costs
- Determine cost effectiveness
- Install the equipment
- Determine optimal operating flow rate
- Determine optimal operating temperature range for the bath
- Heat the tank at the upper end of its optimal temperature range. Heating lowers the liquid’s viscosity, allowing it to drip off more easily, reducing dragout
- Monitor the temperature
- train and monitor employees – give incentives for superior performance
Resources
- Cushnie, George C. Jr. Pollution Prevention and Control Technology for Plating Operations. National Center for Manufacturing Sciences, Ann Arbor, MI, 1994.
- NMFRC: Vendor Resource Center
- PF Online
Vendors
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