Rims are very important accessories whose shapes and materials modify the kart’s setup and greatly influence the tires temperature and performance both in terms of lap times and their overall durability. AMV, a company with an unparalleled wealth of competency and experience in the industry has designed new magnesium rims which utilize the advantages of low-pressure castings and the new OXiTECH treatment which improves the quality level of the product, its performance and durability.
AMV, based in the north-east of Italy, in an area greatly interested and involved in karting, was founded in 1992 as a kart rim manufacturer. In 2008 the company was taken over by the Stefanello family who expanded the production to other magnesium components for karts such as gearwheel supports, disc housings, hubs and complete braking systems. Presently, the manufacturing of these products for third party vendors constitutes its main activity. Over the years, AMV has always distinguished itself for its dedicated and consistent work on research which recently culminated in the development of low-pressure casting and OXiTECH treatment. Two processes that allow the manufacturing of high-quality magnesium components for karts while representing a new step into the future.
THE OXiTECH PROJECT
As Tommaso Stefanello, owner of AMV explains the OXiTECH rim was born from a specific need: “The magnesium rim, after the mechanical machining presents an issue linked to its oxidation. This natural process is usually limited by the use of a chromate conversion coating, a magnesium corrosion inhibitor with an iridescent gold yellow color that is somewhat obsolete. The main limitation is its duration as, with the passing of time and the use of the rims, the coating is lost leaving access to the oxidation and corrosion of the magnesium. Hence the desire to study an alternative method that would allow us to maintain the aesthetic and functional properties of the magnesium rim unaltered throughout its existence”.
The innovative OXiTECH treatment introduced by AMV consists of a special plasma electrolytic oxidation which gives the magnesium extraordinary characteristics of protection from corrosion and wear. Unlike traditional anodizing treatments, the new process uses electrostatic discharges which create a plasma like substance on the surface of the piece, thus obtaining a micro-fusion of the oxide layer which mineralizes and compacts, increasing hardness and resistance to wear. The coating is about 10µm, a minimum measure which does not influence AMV quality parameters and allows, unlike painting, the rims to not have to go back to machining centers to correct the impacted surfaces.