Electroplating
Electroplating Cr(VI) Reduction
Sodium bisulfite reduction with ORP interlock keeps Cr(VI) stably below discharge limits.
Key Metric
100%
Compliance
Challenge
Incomplete Cr(VI) reduction — poor ORP control meant wasted chemical or exceedances.
Solution
Metering pumps dose sodium bisulfite under ORP feedback with staged pH control for reaction conditions.
Results
- Stable Cr(VI) compliance
- Optimized reductant use
- Traceable online data
