Environmentally sound plating for the aviation industry: Cd-free and Cr(VI)-free cathodic corrosion protection - (PPT)

摘要

Cd- and Cr(VI) substitution is due to high toxicity; Zinc-nickel y-phase provides highest sacrificial corrosion protection; ZnNi is being qualified in many applications as Cd-substitute Excellent experience in automotive industry for steel protection; High-end Cr(VI)-free passivation (EcoTriSB) with excellent corrosion protection and heat resistance as Cr(VI) substitute; Online analytics are key to consistent high quality through tight process control. XRF for Zn, Ni to keep Ni in alloy in tight range to safely obtain γ-ZnNi; XRF to monitor passivate composition. Auxiliary equipment for consistently plating at the highest quality: Constant high productivity, high quality with UF membrane anodes; Ion exchange system (Tricotect) for constant high passivation quality.