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Reactions with Black Phosphate Oxide coating
I am using new hose couplings in the hydraulic, coolant, fuel and transmission systems of the machines we produce here. The new couplings are coated with a black phosphate oxide. Will this coating react in any way with the fluids contained in the various systems?
- Woodstock, Ontario, Canada
Not to my knowledge, although if the coating was "oiled" the oil would presumably leach into organic fluids.
Ted Mooney, P.E.
Pine Beach, New Jersey
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