P&O steel and ZnNi Electroplating
Rust and other corrosion forms ruin the integrity of brake components and can lead to safety issues. EV brake system will bring a higher moisture concentration, as less intense cycles of accelerating and braking will occur, and temperatures reached will be lower than in ICE vehicle brakes.
Steel corrosion is an electrochemical process where the iron in the steel is oxidised to produce rust and occurs in simultaneous presence of moisture and oxygen.
NUADI backing plates are produced exclusively with pickled &oiled steel. For EV applications additional protection will be needed and the most efficient process is ZnNi electroplating.
·Pickling & Oiling·
When steel is laminated at the mill, tons of water are thrown to maintain steel temperature and guarantee mechanical characteristics. But this produces rust in form of mill scale. When the final application demands a high degree of surface cleanliness (e.g. friction adhesion and painting process) pickling and oiling steel must be incorporated into the final steps of its manufacturing to ensure total elimination of all layers of mill scale.
Steel pickling is a metal surface treatment finishing process used to remove surface impurities such as rust and carbon scale from hot rolled carbon steel. The steel is submersed in a bath of pickle liquor, a solution of Hydrogen Chloride acid, to remove the impurities from the surface of the steel.
Oiling is an oxidation prevention process applied to steel once it has been pickled.
No mechanical treatment or coatings (such as shotblasting, phosphating or nitriding) neither manual immersion in an acid bath can substitute the continuous industrial P&O process.
·Electroplating·
This is the most efficient process of coating a surface with a thin layer of metal, extending the corrosion resistance of any metal object or accessory. It coats the object to protect it from dust or exposure to moisture. Zinc-Nickel plating is used for high temperatures and aggressive environmental conditions.
Combining P&O steel and ZnNi electroplating we are adding the best resistance and durability to EV brake metal components.
NUADI Group provides a fully integrated solution for the EV Original Equipment brakes.