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AHU Coils: 6 Basic Types of Coated Coils You Must Know!

Protective coil coatings are highly beneficial in increasing the efficiency of the condensing units like air conditioners and refrigerators. For instance, hydrophilic coated coils enhance the life of the systems by offering long lasting corrosion protection to the appliances. This article will assist you to understand different types of coating techniques and their usage. Read here!

The fins on condenser and evaporator coils are manufactured using aluminium and copper which are relatively resistant to corrosion without applying any type of coating. However, due to harsh environmental conditions, every condenser and evaporator coil manufacturer in India now aims to use various types of protective coil coatings including Hydrophilic, Heresite, Technicoat, etc. Selecting and applying a proper AHU coil coating significantly helps to extend the service life of the gadgets as compared to an uncoated or unprotected AHU coil.

There are a plethora of coil coating techniques available in the market that immensely help to increase the efficiency of the condensing units. Some of them are-

Technicoat – Technicoat is an air-dried and raisin based thermoplastic material that is made using baked phenolic coating. This type of coating is designed in a way that it can be used in salt-water environments. Technicoat coating has been successfully used in water treatment plants, food processing plants, paper mills, oil and gas related plants, odd shore drilling rigs, hotels, hospitals and laboratories etc. This type of protective coating is easy to apply and requires minimal maintenance as well.

Hydrophilic – Hydrophilic is a type of coating that helps to protect the coils of the condensing units from getting corroded. Hydrophilic coated coils are rust resistant and are protective against various types of damaging environments such as coastal salt air, acid rain, and humid temperature. This type of coating improves the operating capacity of the coils and also aids in reducing excess energy consumption.

Heresite – Heresite is an over-cured modified phenolic coating and is dark brown in colour. Being extremely flexible for coating it is majorly used in safeguarding HVAC/R equipment against corrosive industrial environment, including marine/offshore applications. It is one of the most used coatings worldwide and is highly resistant to abrasion and chemicals as well.

E-coat – Electrocoating or E–coat is an environment-friendly wet paint process that is used on products such as primers or vehicles. This type of coating helps in restricting chipping of metals and greatly extends the life of the coils. It is known to be the thinnest coating that is applied using computer-controlled applications.

Thermoguard- It is a type of heat-conductive spray coating technique that is done to achieve a long lasting protection from corrosion and humid temperature. Since, both Thermogurad and hydrophilic coated coils have smooth surfaces, they help to resist adhesion from dust particles and dirt to a large extent. Both of them allow least consumption of energy. However, they do require routine maintenance.
Esgard – Esgard is a type of base coating that helps to extend the life of coils in a super corrosive environment.

Astha Khandelwal is an ardent blogger and possess immense knowledge in the field of physics. His articles and blogs about AHU coils, condensers, evaporators, HVAC & R applications are highly informational in nature!
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