Iron and Oil Content in Zinc Phosphate Line: Smart Advice

Summary for iron and oil content Discussion

iron and oil content in zinc phosphate line is discussed as a practical troubleshooting issue rather than a simple lab test. Ashok Surve asks how to find iron and oil content in the acidic degreasing, derusting, and phosphating tanks of a zinc phosphating process. In reply, the answerer suggests the real problem may be poor acidic degreasing or contamination from an overhead hoist dripping oil and rust into the tanks. He notes that oil in the derusting and zinc phosphate tanks would usually be visible as a surface skim, and says progress will be faster if the actual operating situation is described instead of trying to solve it as an abstract analytical question. The response implies that multiple chemical analysis methods would be needed for the different tanks, each with its own interferences, but does not provide a specific test procedure.