HEDP comprehensive analysis: scale inhibition, corrosion inhibition, cleaning in one net

HEDP (1-hydroxyethylphosphonic acid or hydroxyethylidene diphosphonic acid) is an organophosphate widely used in water treatment, metal corrosion control, and cleaning. The following is a comprehensive analysis of HEDP in scale inhibition, corrosion inhibition, cleaning:

I. Scale inhibition

Principle of action:

HEDP in the phosphate (PO4³-) and hydroxyl (OH-) and other functional groups can be metal ions in water (such as calcium, magnesium, iron, etc.) to form stable complexes.

These complexes can effectively inhibit the precipitation and crystallization of metal ions, thus reducing the generation of scale.

Application effect:

In industrial circulating cooling water system, boiler feed water, oil field water injection and other occasions, HEDP can effectively prevent the formation of scale and keep the equipment clean and efficient operation.

By reducing the generation of scale, HEDP can also reduce the energy consumption and maintenance costs of equipment.

Second, corrosion inhibition

Principle of action:

HEDP can form a protective corrosion inhibition film on the metal surface, reducing the rate of electrochemical reaction on the metal surface.

HEDP can also occur with the metal surface of the oxide coordination reaction to prevent further oxidation and corrosion.

Application effect:

HEDP can effectively retard the corrosion of steel, copper, aluminum and other metal materials, reducing the corrosion phenomenon in the water system.

By slowing down the corrosion rate of the metal, HEDP can extend the service life of the equipment and reduce maintenance and replacement costs.

Third, the role of cleaning

Role principle:

HEDP can form stable complexes with dirt, grease, etc. on metal surfaces and non-metallic surfaces, thus effectively removing these impurities.

The phosphonic acid group in the molecular structure of HEDP can combine with the metal ions in the dirt to improve the cleaning efficiency.

Application effect:

In the cleaning agent for electronics industry, HEDP can be used to clean wafers, circuit boards and other precision parts to remove pollutants and residues on the surface.

HEDP can also be used in metal and non-metal cleaning agents for the light textile industry, peroxide stabilizers and color-fixing agents for the bleaching and dyeing industry, and complexing agents for the cyanide-free plating industry.

Other features and advantages

Broad-spectrum adaptability: HEDP is suitable for acidic, neutral and alkaline water quality, with strong adaptability and wide application.

High efficiency: HEDP can quickly and effectively reduce the deposition of carbonate, sulfate and rust in water on pipes and equipment.

Environmental friendliness: HEDP has less toxicity, meets the requirements of environmental protection, and is friendly to the environment.

Stability: HEDP is not easy to decompose under light and heat conditions, and remains stable in high pH environment, not easy to hydrolyze.

V. Precautions for use

Concentration: The concentration of HEDP should be determined according to the actual situation and test results to ensure its best effect.

Packing and storage: HEDP should be stored in a cool and ventilated place indoors, protected from moisture and avoid contact with skin and eyes.

Operation safety: labor protection should be paid attention to during operation, avoid inhalation or accidental ingestion of HEDP. immediately flush with plenty of water after contact and seek medical assistance.