Implement reliable lubricants that maximize operational efficiency and braze performance.

Eliminate organic content junking up your heat exchanger parts. Implement braze-friendly lubricants to reduce or eliminate cleaning stages, streamline manufacturing processes, and improve quality.

Internal Cleaning & Passivation Coatings

Internal cleaning and passivation chemistry and application process for a wide variety of heat exchangers.


CPI lubricants were made for heat exchangers.

CPI lubricants are formulated to optimize heat exchanger manufacturing processes at each step.


Flux Application Services

Struggling to meet a quality spec? We can help.

Get rid of organic content in your parts.

External Passivation & Coatings

Avoid recalls, repairs and warranty claims before they happen.

Let’s face it, every now and then you need a discreet partner to develop a custom solution to an urgent or substantial problem. We help some of the biggest names in the business avoid costly setbacks caused by galvanic corrosion, microbial growth, odors and degraded HEX performance.

Passivation FAQ

Yes. We have developed a broad range of cleaners, passivation chemistry, and sealers to meet customer specific cleanliness, corrosion resistance, water shedding, and antimicrobial/antifungal requirements. Our sealer coatings improve water management characteristics of the surface ensuring water does not remain on HEX surfaces negatively impacting HEX performance

Yes. Our passivation chemistry delivers exceptional corrosion resistance properties to the aluminum surfaces. It also provides excellent adhesion to secure bond sealer coatings. We tailor our cleaning chemistry and process to consistently meet customer specifications with minimal waste.

Yes. Through our work with ultra-clean fuel cell applications, electric vehicle thermal management systems, and high performance combustion engine cooling systems, we have developed the know-how to optimize the process to consistently meet customer specifications with minimal waste. We will tailor our cleaning chemistry and process to meet your toughest requirements.

Yes. Circle-Prosco has developed a variety of solutions to prevent this common problem. Contamination of cooling systems by post-braze residual flux is a widely known failure mode in the automotive industry. Residual flux interacts with coolant causing the coolant to gel. This gelling results in system clogging which in turn increases system operating pressure and temperatures, reduces system efficiency, and system operating life. New energy vehicle systems, both electric and fuel cell, are more sensitive to this contamination so the focus on eliminating it has become heightened in recent years and will continue to be a key design consideration as engineers seek to maximize vehicle range, and battery life.

No. Our process is highly effective at removing post-braze residual flux and enhancing the corrosion resistance properties of aluminum heat exchangers. It can be applied on our coating lines or by the customer in their operations. Our chemistry is not designed to be applied in a post manufacturing service environment.