... , can be used for metal surface treatment. . Properties:HEDP•Na is an organophosphonic acid corrosion inhibitor, it can chelate with ... metal ions in water system, Ca2+ in particular. HEDP•Na has good scale inhibition effects and obvious dissolution threshold effects ... other Water Treatment Chemicals, the synergistic effects is better.HEDP•Na is suitable for acidic scale inhibitor and detergent, can ...