The earth is covered by 70% of surface water, but freshwater resources are still rare. Water conservation is very important. First of all, we must pay attention to industrial water that consumes a large amount of water.

In industrial water, cooling water accounts for about 60% – 70%, which is the largest part. Therefore, saving cooling water is a top priority for industrial water conservation. The emergence of HEDP phosphonate and other water treatment chemicals has provided powerful support for saving cooling water.

Recycling the cooling water greatly saves water consumption.

However, as the cooling water continuously evaporates, the concentration of salt in the water increases. At the same time, the contact of cooling water with the atmosphere, the dissolved oxygen, and bacteria content increased significantly. This leads to fouling and corrosion of circulating cooling water equipment.

Bacteria and algae grow massively in the pipeline. For those reasons, the heat transfer rate of the cooling water is greatly reduced. The frequent maintenance of cooling water equipment has affected the normal production process.

For this purpose, a water treatment agent such as HEDP phosphate must be added to the cooling water.

This chemical technique, called chemical water treatment, is a chemical technique that prevents scaling and corrosion of circulating water. It includes pre-treatment, cleaning, pickling, pre-coating, conventional addition, sterilization, and other processes.

Coagulants and flocculants are also important means for primary treatment of wastewater. Coagulants and flocculants are also important means for primary treatment of wastewater. Chemical water treatment technology is currently recognized as the most widely used and most effective means of industrial water conservation at home and abroad.

Scale and corrosion have a significant negative effect on cooling water equipment. HEDP can reduce fouling well. HEDP phosphonate provides good protection for cooling water equipment. Phosphate is an anodic corrosion inhibitor.

In the neutral and alkaline environment, the corrosion inhibition of phosphate on carbon steel depends mainly on dissolved oxygen the in water.

The reaction of dissolved oxygen with steel produces a thin layer of a γ-Fe₂O₃ oxide film. The growth of this oxide film takes a long time to complete. During this period, electrochemical corrosion continued to occur at the gap of the oxide film. These gaps can be blocked by continuously growing iron oxide. These gaps can be blocked by continuously growing iron oxide and insoluble iron phosphate to protect the carbon steel.

Since the HEDP phosphate reacts with calcium ions in water, the resulting calcium phosphate-prone scale has little solubility in water. Therefore, HEDP was rarely used as a cooling water inhibitor in the past.

In recent years, HEDP phosphonates have been used as cooling water corrosion inhibitors due to the development of series copolymers such as acrylic acid and hydroxypropyl acrylate. However, IRO recommends that HEDP is used together with the copolymer.

If you have any requirements for HEDP and other water treatment chemicals, you can send email to us.

The main product of this website is HEDP, an organic phosphonic acid in water treatment. HEDP can be used as a scale inhibitor or as a metal cleaner. However, there are more water treatment products in the water treatment industry.

According to different USES and processes, the main types of water treatment chemicals are as follows.

Synergetic preparation can effectively prevent the formation of scale and microbial viscosity, improve the system desalination rate and water yield, and prolong the service life of reverse osmosis membrane.

Circulating cooling water treatment chemicals ensure that the cooling tower, chiller, and other equipment are in the best running state. They can effectively control the microbial flora, inhibit the production of scale, and prevent corrosion of pipeline equipment. To reduce energy consumption and prolong the service life of the equipment.

Synergetic preparation can prevent the boiler from corroding and scaling. It can stabilize the boiler water quality and ensure the normal operation of the boiler. Synergistic combination preparation can reduce the boiler consumption and prolong the service life of the boiler.

In addition, the preparation of wastewater treatment needs to be done well. Water treatment technology combined with depth treatment can be used for a long time. It also saves a lot of water.

When the system is of high hardness and alkalinity, chelators and dispersants are not sufficient to prevent them from settling. If there are no dispersants, the growth of the dirt will follow the general rule of the growth of the crystal, and the formation of dirt will be firmly attached to the surface of the heat exchanger.

If there is enough of dispersant, scale particles (is made up of hundreds of thousands of CaCO₃ molecules) surrounded by adsorption and dispersant, prevent dirt particles are arranged in its rules on the crystal lattice of the crystal lattice, resulting in a dirt soft and easy to be water washed away.

There are many kinds of scaling on the surface of the metal, such as oil-soluble scaling, water-soluble scaling, metal rust, and scaling. HEDP is mainly used to clean inorganic scale, alkaline oxide, and hydroxide of the metal surface.

The commonly used organic acids metal cleaning agent is HEDP acid. In the process of pickling, HEDP acid cannot only dissolve scaling but also play a role in inorganic scale.

On the one hand, the composition of inorganic salts changes, and some inorganic salts are converted to soluble salts. For example, calcium carbonate and magnesium carbonate are converted to calcium chloride and magnesium chloride by hydrochloric acid.

The other part is converted into new insoluble salts, but the new insoluble salts formed in a short time are dispersed and easily washed away.

Therefore, the effective utilization of the characteristics of HEDP can greatly reduce the formation of the scale of the metal surface. So that the metal equipment can work better in production.