Electro-Ceramic Anodised Coatings (Keronite)

Primary Features of Apticote Keronite

• Superb corrosion resistance (> 5,000hrs salt spray)
• Extremely hard (up to 1,500Hv)
• Effective undercoat for paints and polymers
• High wear resistance, in both abrasive or sliding situations
• Very effective thermal barrier
• Thick coatings, up to 150µ, with predictable coverage and dimensional control
• Superb heat resistance
• High dielectric strength

Some Key Benefits of Apticote Keronite

• Life of textile machine parts increased 10-fold
• No wear or leakage with seals
• Reduced weight, with no wear, for bike brakes, clutches and frames.
• Light weight magnesium leisure wear, spectacles and watches, with no corrosion
• Coated piston skirts reduce wear
• Coated piston crowns give more efficient combustion.
• Eliminates galvanic corrosion cells with titanium components
• Can replace expensive solid ceramics with a cost-effective coating

Corrosion Protection - Apticote Keronite 3000 gives superb corrosion resistance. Unlike ordinary anodising, the coatings are dense and thick. On 6082 alloy, for instance, the coating will provide 5,000 hours with no corrosion spots in a standard salt mist exposure test.

Thickness and Coverage - Coating thickness is typically 50 to 70µ, but 150µ is possible if the application demands. The outward surface growth is 30% of the total thickness. Penetration down holes is to one diameter deep, but special tooling can provide coverage down long tubes or bores if required. Unlike anodising, Apticote Keronite 3000 can coat a sharp corner without cracking.

Thermal Barrier - The Apticote Keronite coating is a superb insulator; ideal for piston crowns, kitchenware and other applications where protection from heat conduction is needed.

Wear Resistance - Apticote Keronite 3000 is highly resistant to both abrasive and adhesive wear. The graph shows the relative wear rates in a Taber Abrasion test. It reflects, for instance, the results that are obtained against synthetic textiles and explains the huge benefits that are gained.

Effect on Fatigue - Rotating bar tests show a reduction in fatigue strength of 7075 Al Alloy of only 14%, much less than is caused by plating or hard anodising.

Finishing - Apticote Keronite 3000 builds with a duplex layer, the outer surface being slightly rough. To avoid abrasion of mating parts (e.g. brake pads), the surface can be easily polished. Ask Poeton for advice.

Cylinder Bores - Apticote Keronite 3000 provides unique wear and lubrication properties on high performance cylinder bores. Ask Poeton for advice on coating and honing.