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Frequently Asked Questions

Throughout the years, we’ve encountered thousands of enquiries regarding HVAC corrosion and its remedies. Below are some frequently asked questions along with their corresponding answers. While this list isn’t exhaustive, it serves as a starting point. Should you have any topics or subjects not addressed here, feel free to reach out to a Blygold expert today!

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Can you apply the treatment on-site if my HVAC isn’t new?

Yes, we offer on-site deep cleaning and protection services. Even if corrosion appears severe, we can assess its recoverability. In most cases, our treatment not only halts corrosion but also prolongs equipment lifespan while delivering energy savings.

How does corrosion impact my air-conditioning’s capacity?

Corrosion diminishes efficiency and capacity, leading to increased energy consumption and reduced cooling capability. Heat exchangers, with their mix of metals and exposure to pollution, are highly susceptible. Corrosion on aluminium surfaces reduces heat transfer efficiency, while pollution obstructs airflow, raising condensing temperature and energy consumption.

Are Blygold coatings resistant to all substances?

Blygold coatings resist many substances at varying concentrations. Explore our Resistance List for comprehensive details at the bottom of this page.

Why is my air-conditioning unit corroding?

Various factors contribute to corrosion, notably the combination of metals (copper and aluminium) and exposure to pollutants and moisture. Galvanic corrosion between these metals is common. Atmospheric agents like sulphur and carbon dioxide exacerbate the process.

Where does corrosion occur?

Corrosion affects heat exchangers in diverse environments. Coastal areas and industrial zones with high pollutant concentrations are particularly prone. Corrosion may not be immediately visible but can lead to rapid deterioration in harsh environments.

Is cleaning my air-conditioning unit necessary?

Yes, periodic cleaning is essential even for units with Blygold coatings. Environmental exposure necessitates maintenance to uphold our warranty. Clean units regularly with a mild detergent, frequency depending on location and conditions.

What’s the difference between pre-coat and Blygold coatings?

Blygold’s aluminium-impregnated polyurethane coating, applied after assembly, ensures complete coverage and penetration. Pre-coat systems lack full coverage and reduce initial capacity due to layering between metals.

How are Blygold coatings applied?

Trained applicators use a standardised, high-pressure air coat spray technique, ensuring uniform coverage and minimal pressure drop across coils.

Where can I purchase Blygold products?

Blygold coatings are applied exclusively by certified applicators. Some service products are available for direct purchase and application by end-users.

How long does a Blygold treatment take?

The duration varies depending on unit size and configuration. A minimum of three days is typically needed for our pre-treatment and coating process.

How long does a Blygold-treated heat exchanger last?

Independent tests and practical cases suggest a lifespan exceeding 10 years, although individual conditions vary.

How do Blygold treatments prevent capacity loss and energy consumption?

By minimising heat transfer impact and providing lasting corrosion protection, Blygold treatments prevent capacity loss and energy consumption increase.

Is a copper/copper heat exchanger corrosion-proof?

While it eliminates one cause of corrosion, a copper/copper heat exchanger remains vulnerable to environmental corrosion. Blygold coatings offer superior protection compared to untreated copper/copper coils.

How can I identify corrosion on my heat exchanger?

Look for persistent white spots or pitting that doesn’t vanish with cleaning. Galvanic corrosion around copper tubes requires more observation, possibly with medical devices like endoscopes or bore scopes.

What’s the cost of a Blygold treatment?

Prices vary based on unit size and configuration. Heat exchangers consist of extensive metal surfaces requiring protective treatment. For instance, a standard 1m² condensing heat exchanger may encompass 80m² of coated surface area.

Answers to a number of frequently asked questions are found on our information sheets. Click the buttons below,

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