Multi-Sided Component Cooling
Learn how pressed-in tubes on at least two sides of the four-sided base body ensure optimal heat transfer – without any external media, purely through our pressing technology.
Surface finishing – Protection, performance and durability for heat sinks
Surface finishing improves corrosion resistance, solderability, heat radiation and the lifespan of air and liquid coolers. Whether anodizing, nickel plating, copper, or gold coatings – each technology offers targeted advantages for specific power electronics applications.
Learn more in a conversationCOOLTEC surface finishing technologies
Anodizing
Anodizing creates a robust oxide layer on aluminum, protecting the material from corrosion, hardening the surface and raising its emissivity, so an anodized heat sink radiates more heat.
Benefits:
Protects against environmental and chemical exposure
Higher emissivity for more radiated heat, electrically insulating surface
Coloring allows for aesthetic surface appearance
Increases heat sink longevity
Chromium-VI-free passivation
This eco-friendly process forms a thin protective layer that shields aluminum heat sinks from corrosion without using harmful Chromium VI.
Benefits:
High corrosion protection
Complies with RoHS and REACH standards
Improves adhesion for subsequent coatings
Sustainable and environmentally friendly
Chemical and electroplated nickel
Nickel plating protects against oxidation, makes the surface solderable, and increases mechanical resistance – applied chemically without electricity or electroplated for maximum density and adhesion.
Benefits:
Excellent corrosion resistance
High wear resistance
Solderable, electrically conductive surface
Base layer for further coatings
Copper coating
An electrolytic copper layer makes the surface solderable and highly conductive electrically, ideal for direct SMD soldering on the heat sink.
Benefits:
Improved thermal connection of electronic components
High mechanical stability
Excellent corrosion protection
Versatile for further refinements
Gold coating
Applied on a nickel base, this coating provides excellent electrical conductivity and minimal contact resistance – ideal for high-frequency applications.
Benefits:
Optimal electrical conductivity
Minimized contact resistance
Direct SMD soldering on the heat sink possible
High-quality, aesthetic appearance
Nickel-tin coating
Combines the advantages of nickel and tin for durable, corrosion-resistant heat sinks.
Benefits:
High wear resistance
Solderable, electrically conductive surface
Uniform surface for further refinements
Ideal for high-performance applications
Powder coating
Electrostatic powder is baked on to form a robust protective layer.
Benefits:
Excellent corrosion protection
High mechanical durability
High emissivity for radiated heat
Environmentally friendly and solvent-free
Wide variety of colors and textures
Nanocoating using SOL-Gel process
A nanoscale coating protects against corrosion, chemical exposure, and mechanical stress without affecting thermal conductivity.
Benefits:
Ultrathin, highly durable protective layer
Optimized heat dissipation
Can be hydrophobic, oleophobic, or antistatic
Precise coating of complex geometries
Environmentally friendly and sustainable
Perfect surfaces for the highest demands
Our surface finishes combine performance, protection, and design – for heat sinks that operate reliably in high-performance applications.
