Polyhydric Alcohol Phosphate Ester (PAPE) 2019-09-11T05:46:17+00:00

Project Description

Synonyms: PAE; Polyol Phosphate Ester;

Molecular Formula: C2H8O8P2.(C2H4O)n

Structural Formula:

PAPE corrosion inhibitor


Esterification in the production introduces multiple Polyethylene Glycol groups. This enhances its corrosion inhibition performance to Ca2+ scale. Its effect on Ba2+ and Sr2+ is also good.

PAPE has good compatibility with polycarboxylates and organophosphates. Its ability to stabilize Zn2+ is characteristic. Thus, PAPE can be built to dispersive antiscalant and inhibitor. Quaternary ammoniums like DDBAC can also be built with PAPE and no complex generates as happens between Quaternary and polycarboxylates/organophosphates.

As the corrosion inhibitor and antiscalant, its effect is unique to the cooling water containing oil, which is normal in the refinery. PAPE is also used in oilfield (as an alternate of Nalco Visco 953), fertilizer plant, AC system, and copper heat exchanger. PAPE will degrade in 3 to 4 days after emission and incurs no pollution.


AppearanceColorless or light yellow transparent liquid
Solid content %50.0 min
Total phosphoric acid (PO43-)%30.0 min
Organophosphonic acid (PO43-)%15.0 min
pH (1% solution)2.0 – 3.0


When used alone, 5-10 mg/L is usually added for anti-scaling. The higher dosage is adopted for good corrosion inhibition. It can achieve even 150 mg/L in a closed circulating system. pH 7.0-8.5 is recommended.

Packing and Storage:

200L plastic drum, IBC(1000L), customers’ requirement.  Storage for ten months in a shady room and dry place.

Safety Protection:

Acidity, avoid contact with eye and skin. Once contacted, flush with water.