1-Hydroxy Ethylidene-1,1-Diphosphonic Acid HEDP-Hebei Longke Water Treatment Co., Ltd.|Corrosion Inhibitor&Scale Inhibitor

Introduction

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) is a versatile organophosphoric acid compound widely used as a scale and corrosion inhibitor in industrial and commercial applications. With its unique chemical structure and exceptional performance, HEDP has become a critical component in water treatment systems, metal protection, and chemical manufacturing. This article provides a comprehensive overview of HEDP, including its properties, technical specifications, applications, and the company behind its production, Hebei Longke Water Treatment Co., Ltd..

Key Features of HEDP

HEDP is a highly effective corrosion scale inhibitor known for its ability to chelate with metal ions such as iron (Fe), copper (Cu), and zinc (Zn). This chelation forms stable complexes, preventing the formation of scale and corrosion on metal surfaces. The compound’s molecular formula is C₂H₈O₇P₂, with a molecular weight of 206.02. Its structural formula is illustrated below:

One of HEDP’s standout features is its stability under extreme conditions. It maintains effectiveness at temperatures up to 250°C and exhibits excellent chemical stability under high pH values. Unlike other organophosphoric acids, HEDP is resistant to hydrolysis and decomposition under normal light and heat conditions. Additionally, it demonstrates superior tolerance to acid/alkali and chlorine oxidation, making it a preferred choice in harsh environments.

Technical Specifications

Items	Index (Aqueous Solution)	Index (Crystal Powder)
Appearance	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active Content (HEDP), %	58-62	90.0 min
Active Content (HEDP·H2O), %	-	98.0 min
Phosphorous Acid (as PO33-), %	2.0 max	0.8 max
Phosphoric Acid (as PO43-), %	0.8 max	0.5 max
Chloride (as Cl-), %	0.02 max	0.01 max
pH (1% water solution)	2.0 max	2.0 max
Density (20℃), g/cm3	1.40 min	-
Fe, mg/L	20.0 max	10.0 max
Color APHA (Hazen)	40.0 max	-
Ca Sequestration (mg CaCO3/g)	500.0 min	-

Advantages of HEDP

HEDP offers several advantages that make it a preferred choice in industrial applications:

• Excellent Scale and Corrosion Inhibition: HEDP forms a protective layer on metal surfaces, preventing the buildup of scale and corrosion. Its ability to chelate with calcium ions enhances its effectiveness as a scale inhibitor.
• High Stability: HEDP remains stable under high temperatures (up to 250°C) and high pH levels, making it suitable for demanding environments.
• Chemical Resistance: It is resistant to hydrolysis and decomposition, ensuring long-term performance in water treatment systems.
• Compatibility with Other Chemicals: HEDP works synergistically with polycarboxylic acids and other water treatment chemicals, enhancing overall efficiency.
• Versatile Applications: HEDP is used in diverse industries, including power generation, chemical processing, metallurgy, and electronics.

Applications of HEDP

HEDP is employed in a wide range of applications, including:

• Circulating Cool Water Systems: HEDP is used to prevent scale and corrosion in industrial cooling towers and heat exchangers.
• Oil Fields and Boilers: It protects equipment from corrosion and scale buildup in oil field operations and low-pressure boilers.
• Textile Industry: HEDP acts as a detergent for metals and non-metals in textile processing.
• Dyeing Industry: It serves as a peroxide stabilizer and dye-fixing agent.
• Electroplating: HEDP functions as a chelating agent in non-cyanide electroplating processes.
• Electronics: Its high purity makes it suitable for cleaning agents in electronic manufacturing.

Usage Guidelines

The recommended dosage of HEDP varies depending on the application:

• Scale Inhibitor: 1-10 mg/L
• Corrosion Inhibitor: 10-50 mg/L
• Detergent: 1000-2000 mg/L

HEDP is typically used in conjunction with polycarboxylic acids to maximize its effectiveness.

Packaging and Storage

HEDP is available in both liquid and solid forms:

• Liquid: 200L plastic drums, IBC (1000L), or customized packaging.
• Solid: 25kg/bag, or customized packaging.

Storage: Keep in a cool, dry, and shaded place for up to 12 months.

Safety and Protection

HEDP is acidic and requires proper handling:

• Use personal protective equipment (PPE) during handling.
• Avoid contact with eyes and skin.
• If splashed, rinse immediately with plenty of water.

Company Background: Hebei Longke Water Treatment Co., Ltd.

Hebei Longke Water Treatment Co., Ltd. is a leading manufacturer of water treatment chemicals, including scale and corrosion inhibitors like HEDP. With a commitment to innovation and quality, the company provides solutions for industries such as power, chemical processing, and metallurgy. Their products are designed to meet international standards, ensuring reliability and performance in diverse applications.

Conclusion

HEDP is a critical component in modern industrial processes, offering exceptional protection against corrosion and scale. Its chemical stability, versatility, and compatibility with other treatments make it an indispensable tool in water treatment and metal protection. For more information on HEDP and related products, visit Hebei Longke Water Treatment Co., Ltd..

References

1. National Institute of Standards and Technology (NIST) – For standards and research on chemical stability and industrial applications.

2. Hebei Longke Water Treatment Co., Ltd. – Product specifications and technical data.