EDTMPS Application Scenarios

Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium (EDTMPS) is a highly versatile, multifunctional chemical widely used across various industries. Its core functions are scale inhibition, corrosion inhibition, and chelation, leveraging its excellent chemical stability and high temperature resistance .

Here are the primary application scenarios for EDTMPS:

Industrial Water Treatment

This is one of the most common applications for EDTMPS.

Cooling Water Systems: It is used as a corrosion inhibitor and scale inhibitor in industrial circulating cooling water systems to prevent metal corrosion and the formation of scales like calcium carbonate .

Boiler Water Treatment: EDTMPS is effective in boiler water treatment, particularly for low-pressure boilers. It is often compounded with other agents like HPMA (at a 1:3 ratio) for internal boiler water treatment .

Typical Dosage: When used alone in circulating cooling water, the typical dosage is 2 to 10 mg/L .

Oil Well Cementing

Recent research highlights EDTMPS's critical role in the oil and gas industry.

Retarder for Cement Slurries: EDTMPS is identified as an effective retarder for oil well cement slurries, especially under challenging high-temperature and high-pressure conditions . It works by delaying the hydration of tricalcium silicate (C3S), the main phase responsible for early strength development in cement . This delay extends the setting time of the cement slurry, which is essential to ensure successful placement and long-term well integrity .

Industrial & Specialty Applications

EDTMPS's chelating and stabilizing properties make it valuable in several other industrial processes:

Textile Industry: It functions as a chelating agent and peroxide bleach stabilizer in the textile and dyeing industry, helping to control metal ions that can interfere with dyeing and bleaching processes .

Electroplating: In electroplating, EDTMPS is used as a complexing agent for non-cyanide electroplating processes .

General Chelation: It serves as a general chelating agent to bind with metal ions, preventing unwanted reactions in various formulations .

Common Formulations and Combinations

EDTMPS is often used in combination with other water treatment chemicals to enhance its performance :

With HPMA (Hydrolyzed Polymaleic Anhydride): For low-pressure boiler water treatment.

With BTA (Benzotriazole): Often used as a corrosion inhibitor for copper and its alloys.

With PAAS (Sodium Polyacrylate): To improve overall scale inhibition and dispersion.

With Zinc Salts: Commonly used to enhance corrosion inhibition.