... 250 Structural Formula: Properties:HEDP•Na2 is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions ... can dissolve the oxidized materials, it has good scale and corrosion inhibition effects even under 250°C, it is stable under ... low pressure boiler, oil field water pipelines as scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy ...