two steel sheets joined face - to - face with a core layer form a laminated workpiece that may be shaped , for example , into automotive components . depending on the nature of the core layer the laminated workpieces may be used for sound and vibration damping or as light weight structural panels . before joining of the steel sheets , their facing surfaces may each be provided with a polymeric corrosion resistant film that resists physical degradation such as tearing or scratching as the laminate is formed into a desired component shape . the pre - applied protective layer may also provide a bonding layer for the viscoelastic core or a structural core material . conductive particles may be incorporated into the viscoelastic layer to assist in electrical resistance welding involving the laminated steel workpiece .