The metallic weaving of the tyres for automotive is composed by steel wires covered with a layer of Brass, to make it compatible with the rubber’s vulcanization.
The Brass is created depositing galvanically a layer of copper and zinc on stainless steel wire reels which are then thermally treated to form the copper-zinc alloy that is known as Brass.
The wires quickly goes through the galvanic copper plating and zinc plating baths with sulphates and sulphuric acid, under cathodic polarisation, between two soluble anodes, normally made of copper or zinc. The use of insoluble anodes has been preferred over the years as they don’t require maintenance, unlike the soluble anodes that need to be replaced often due to uneven consumption compromising the regular shape and therefore the distribution of the current.
As a result, activated Titanium anodes have been widely adopted, especially in the zinc plating baths, where it’s simpler to reintegrate the zinc used. Recently some manufacturers also use these anodes in the (acid) copper-plating bath adding Copper Oxide to reintegrate the solution.
We manufacture anodes with a coating that is designed and tested for this use, in shapes based on the client’s drawing. If help is required to identify the best options we can propose solutions aimed at meeting the different needs.