Micro Channel Heat Exchangers (MCHEs), originally developed for the automotive industry, have recently become widely used in HVAC&R systems.
Their lightweight all-aluminium design provides higher energy efficiency, requires less refrigerant, and eliminates the risk of galvanic corrosion between dissimilar metals. However, in aggressive or corrosive environments, both the aluminium fins and tubes remain vulnerable to corrosion. Blygold’s advanced MCHE coating technology provides long-term corrosion protection, helping to extend equipment lifespan, maintain energy efficiency, and reduce maintenance and replacement costs.
Blygold PoluAl MC is a highly flexible coating specifically developed for microchannel heat exchangers. Even after extensive thermal cycling, the coating retains its flexibility and withstands fin deformation without cracking or delamination.
An additional advantage of this flexibility is that flat microchannel coils can be bent after the coating has been applied. Testing has demonstrated that the coating remains fully intact, even in the bent sections of the coil.
Blygold PoluAl MC is applied using Blygold’s proprietary spray technology, ensuring complete and uniform coverage of microchannel heat exchangers (MCHEs). The coating can be applied to virtually any size or configuration, both during manufacturing (OEM) and on existing equipment. Pre-formed and pre-bent coils can also be treated effectively, providing long-term corrosion protection without compromising heat transfer or system performance.
For more than 50 years, Blygold has been a global leader in HVAC corrosion protection. Our advanced coating systems are specifically engineered to protect heat exchangers from corrosion caused by dissimilar metals, moisture, salt, chemicals, and airborne contaminants. Designed to maintain optimal heat transfer and system efficiency, Blygold coatings help extend equipment lifespan, reduce maintenance costs, and prevent premature HVAC failures.
The success of Blygold’s coating technology is based on its unique combination of an ultra-thin coating film, outstanding UV and chemical resistance, and proprietary application techniques that ensure complete and durable coverage. Today, Blygold coatings are trusted worldwide and have been successfully applied to landmark projects, including the Queen Mary 2, Palm Jumeirah, and London Heathrow Airport, delivering long-lasting corrosion protection in some of the world’s most demanding environments.
Blygold PoluAl MC forms a continuous protective barrier that completely isolates vulnerable aluminium tubes and fins from corrosive environments. The ultra-thin, single-coat microchannel heat exchanger coating effectively prevents pitting corrosion, reducing the risk of refrigerant leaks and premature equipment failure.
The aluminium-pigmented coating reflects solar radiation, providing outstanding UV resistance while reducing solar heat absorption to help maintain optimal system performance and energy efficiency.
Its smooth coating surface enhances water drainage, allowing moisture to run off quickly. This minimizes the risk of corrosion, reduces the accumulation of dirt and airborne contaminants, and helps keep the heat exchanger operating at peak efficiency.
Blygold’s proprietary spray application technology ensures complete and uniform coverage of microchannel heat exchangers (MCHEs) without bridging the fin spacing or blocking fin enhancements. As a result, the original heat transfer performance and airflow characteristics of the heat exchanger are fully maintained while providing long-term corrosion protection.
