Fluid Delivery Tubes

For productivity reasons, many fluid delivery tubes are processed in straight conditions and are submitted to a post forming process. Therefore a highly ductile coating is needed which preserves its corrosion protective properties even after bending. Our innovative zinc-nickel technology Reflectalloy® ZN-HD is perfectly suited for this application. Reflectalloy® ZN-HD is an alka-line zinc-nickel process featuring high corrosion resistance, reduced crystallite size and deformation stress relief through micro-crack formation. For lower corrosion requirements, our alkaline cyanide-free zinc process Protolux® 3000 can be used.

Typical Process Sequence with Recommended Products

Processing of Fuel Injection Rails (FIR) does not involve the post-bending requirement, but highest standards for absence of particles. To achieve best inner tube corrosion resistance without any risk of particle formation even with alcoholic fuels, the parts are electroless nickel plated using Atotech's unique EDEN® system, which provides optimum process control resulting in consistent deposits. This is followed by alkaline ZnNi plating with Reflectalloy® ZNA to achieve best corrosion protection for the outside areas.