Diffusion Coatings for High-Temperature Corrosion & Wear Protection
Protect Critical Components. Extend Service Life. Reduce Downtime.
When critical components operate in aggressive, high-temperature environments, conventional surface treatments often fail.
Diffusion Alloys specialises in advanced diffusion coatings that provide long-term protection against oxidation, carburisation, sulphidation, metal dusting and other high-temperature degradation mechanisms.
For nearly 70 years, we’ve partnered with manufacturers across the aerospace, energy, petrochemical, hydrogen and process industries to engineer coating solutions that improve reliability, extend component life and reduce maintenance costs.
Need advice on a specific application? Speak to one of our engineers to discuss your operating environment and coating requirements.
What Are Diffusion Coatings?
Unlike conventional coatings that sit on the surface, diffusion coatings create a metallurgically bonded protective layer by diffusing alloying elements into the substrate.
Because the coating becomes part of the component, diffusion coatings offer exceptional durability in demanding environments where conventional plating or sprayed coatings may not provide the required long-term performance.
Typical benefits include:
• Improved resistance to high-temperature oxidation
• Protection against carburisation and sulphidation
• Enhanced resistance to metal dusting
• Increased component reliability
• Longer maintenance intervals
• Reduced lifecycle costs
• Excellent adhesion without the risk of coating delamination
Our Diffusion Coating Technologies
Diffusion Alloys provides a comprehensive range of surface engineering solutions including:
Aluminizing
Protects components operating at elevated temperatures by forming a stable aluminium oxide layer that resists oxidation and corrosion.
Typical applications include:
• Furnace components
• Reformer tubes
• Burner assemblies
• Heat exchangers
• Gas turbine components
Chromizing
Designed to improve resistance to oxidation, corrosion and aggressive chemical environments.
Suitable for:
• Petrochemical equipment
• Process plant components
• High-temperature industrial systems
Boronizing
Creates an extremely hard diffusion layer that significantly improves wear resistance in demanding mechanical applications.
Often specified for:
• Valves
• Pump components
• Tooling
• Wear parts
Industries We Support
Our coatings are trusted across a wide range of industries, including:
• Hydrogen production
• Petrochemical processing
• Power generation
• Aerospace
• Nuclear
• Chemical processing
• Heat treatment
• General industrial manufacturing
Whether protecting new components or extending the service life of existing assets, our engineers develop coating solutions tailored to each operating environment.
Common Problems We Solve
Our customers typically approach us when they’re experiencing:
• Premature component failure
• High maintenance costs
• Frequent shutdowns
• High-temperature oxidation
• Metal dusting
• Carburisation
• Sulphidation
• Corrosion in aggressive process environments
• Excessive wear
• Short component life
If any of these issues sound familiar, our engineering team can help identify the underlying degradation mechanism and recommend the most appropriate surface engineering solution.
Why Choose Diffusion Alloys?
Engineering Expertise
For almost seven decades, we’ve been helping manufacturers solve complex materials challenges using advanced diffusion coating technologies.
Tailored Solutions
Every operating environment is different. We work with you to understand your application before recommending the most suitable coating system.
Comprehensive Capabilities
Our services include:
• Diffusion coatings
• Chemical Vapour Deposition (CVD)
• Thermal spray technologies
• Heat treatment
• Shot peening
• Coating development
• Metallurgical testing
Long-Term Performance
Our objective isn’t simply to coat components, it’s to improve reliability, extend service life and reduce the total cost of ownership for critical assets.
Speak to a Surface Engineering Specialist
Choosing the right coating can significantly improve component performance, reduce maintenance and extend operational life.
Whether you’re designing a new component or looking to solve an existing reliability issue, our engineers are here to help.
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