Research: Corrosion of ultra high strength steels (UHSS) for automotive applications. Weight reduction of carbodies can be achieved by application of steel components with a lower thickness; however mechanical properties (for constructive and safety reasons) must be maintained, which can be achieved by using (U)HS steels. These steels have been designed and optimized for improved mechanical behaviour and therefore normally have a poorer or at least not well documented and understood corrosion resistance. Especially since these UHSS components have a lower thickness, attack by corrosion and thereby loss of material resulting in further thickness reduction is even more detrimental to the integrity of the carbodies than for normal steels. Therefore, special attention must be paid to the effective corrosion protection UHHS. The aim of the project is to get detailed insight in the corrosion susceptibility of Ultra High Strength Steels (UHSS). Especially the role of the microstructure (as a result of the processing route and heat treatment) and alloy composition will be investigated. This information will be basis to the optimisation of the corrosion behaviour in relation to mechanical
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