HEDP (Hydroxyethylidene diphosphonic Acid) is an organic phosphorus corrosion inhibitor that can be used for corrosion inhibition of aluminum alloys.
For aluminum alloys, the corrosion inhibition effect of HEDP is mainly due to its ability to form stable complexes with aluminum ions, thereby protecting the surface of the aluminum alloy and preventing further corrosion. Some studies have shown that HEDP performs better than other organic phosphorus corrosion inhibitors in aluminum alloy corrosion inhibition.
It should be noted that in practical applications, the corrosion inhibition effect of HEDP is also influenced by many factors, such as pH value, temperature, ion strength, etc. Therefore, in specific applications, it is necessary to determine the optimal usage conditions and inhibitor concentration based on the actual situation.