The Benefits of Using Hydrophilic coatings for Air Conditioner

In the core structure of modern air conditioning systems, heat exchangers play a critical role in maintaining energy efficiency and system reliability. The aluminum fins of these heat exchangers are typically treated with hydrophilic coatings that optimize water management, improve heat exchange performance, and protect against corrosion — ensuring long-term, trouble-free operation.

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Human New Material, a leading supplier of air conditioner hydrophilic coatings since , offers advanced, industry-proven solutions that meet the evolving demands for high efficiency, compact design, and environmental sustainability in HVAC systems worldwide.

Main functions

Anti-Corrosion Protection

Effectively shields aluminum fins against chemical, environmental, and electrochemical corrosion — especially critical in humid, coastal, or marine climates.

Improved Heat Exchange Efficiency

Promotes rapid water spreading and drainage, reducing the risk of water droplet accumulation and delayed evaporation. This enhances heat transfer efficiency and helps maintain optimal system performance.

Extended Service Life

By preventing early corrosion and reducing frost buildup, hydrophilic coatings significantly extend the operational lifespan of air conditioner units, reducing maintenance and replacement costs.

In the core structure of air conditioners, the role of heat exchangers is crucial. The heat sinks of heat exchangers are mostly made of 0.1mm aluminum foil treated with anti-corrosion hydrophilic coatings.

This treatment allows the condensed water quickly spread along the surface of the aluminum fins and flow away, effectively delaying frost formation and corrosion.

This not only significantly improves heat exchange efficiency, but also extends the service life of air conditioner.

Advantages

Human New Material has been supplying hydrophilic coatings to the air conditioning industry since , establishing long-term cooperation with brand owners of air conditioning domestically and around the globe.

In Y, Human New Material was rewarded "Single Category Champion " of A/C Hydrophilic Coatings in China,

As energy conservation and environmental protection requirements become increasingly stringent, air conditioning products are developing in the direction of miniaturization, lightweight and high performance.

Humanchem New Material has launched a number of new hydrophilic coatings that meet the new requirements of the industry, including highly corrosion-resistant hydrophilic coatings suitable for marine climates and self-lubricating hydrophilic coatings suitable for high-speed punching as well as antibacterial coatings that can block bacteria, etc..

Key Features

Property Performance Advantage Rapid Water Spreading Promotes uniform condensation film and faster water drainage Excellent Corrosion Resistance Protects against salt spray, moisture, and chemical agents Ultra-Thin Coating (<5μm) Maintains heat exchanger fin flexibility and high surface area Antibacterial Option Available Reduces bacterial growth and airborne contamination risks Self-Lubricating Formula Option Ensures efficient fin processing during manufacturing

Applications

Residential and Commercial Air Conditioners
Automotive HVAC Systems
Refrigeration and Cold Chain Units
Heat Pump Systems
Industrial Cooling Systems

Specifications

Product type

Top Coat

Appearance of Dried Film

Transparent

Viscosity (T-4 cup, 25℃)

9-13 s

pH (25℃)

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2-4

Weight of Dried Film (Single Side)

0.25-0.30g/m2

Coating Method

Roller

PMT

224-249℃

Product type

Base Coat

Appearance of Dried Film

Transparent （before adding pigment）

Viscosity (T-4 cup, 25℃)

12-16 s

pH (25℃)

7-9

Weight of Dried Film (Single Side)

0.80-1.20 g/m2

Coating Method

Roller

PMT

216-249℃

Why Choose Human New Material Hydrophilic Coatings?

HVAC systems are used in places where people need protection from the elements, or the environment must be stabilized to provide general cooling or ideal conditions for food preparation or pharmaceuticals. However, while air handling units (AHUs) benefit the people who live or work in the improved environment they create, the units themselves are exposed to harsh conditions.

Since Heresite developed the first coating and application procedure to successfully protect heat transfer equipment many years ago, we’ve become well known for the ability of our coatings to extend the life of HVAC coils. Unfortunately, simply coating the HVAC coil is not enough. In severe (C5 or CX) environments, corrosive elements will find their way into the unit and can damage blowers, doors, enclosures, fans, louvers, and exposed piping. Here are three reasons you might want to consider coating your entire HVAC unit instead of just coating the coils.

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1. Coating the entire HVAC unit can extend unit life with improved functionality. The coil is certainly an important part of an HVAC unit. However, there are many other parts to an HVAC system that could experience a loss in performance when exposed to a corrosive environment. Heresite has extensively tested to help our customers understand the potential wasted time and expense that can be avoided by coating their HVAC coils. Coating entire units will protect the other functional parts of the system, including the fans, pipes, and other essential components.
2. Coating will protect units placed in a high humidity or corrosive environment. High humidity environments, such as coastal areas, wastewater treatment plants, or swimming pools, can be extremely corrosive. To ensure the best possible protection for our customers, we tested P-413  by placing coated and uncoated panels in a municipal wastewater treatment facility for 2.5 years. The results showed that after extended exposure to the extreme real-world environment of the wastewater treatment facility, there were no signs of wear or degradation on the panels coated with P-413.
3. Coating increases your ability to maintain clean equipment. Food safety standards require chemical sanitization in food processing environments. Heresite’s P-413 is the only coating with a NSF/ANSI 51: Food Equipment Materials-rated phenolic-epoxy for HVAC-R coils. Coating your equipment can make it a lot easier to clean properly. Learn about this important food safety standard. In addition, many companies use UV-C lights to sterilize HVAC coils and recirculated air. UV-C sterilization can improve indoor air quality, energy efficiency, and the health of the people who live or work in buildings by destroying contaminants such as mold, viruses, and bacteria. To ensure the effectiveness of our coatings, Heresite conducted a test in conjunction with Sanuvox Technologies laboratory to test the ability of P-413 to withstand continued exposure to UV-C light. Learn more about the results of this test.