Electrical Resistivity

The use of aluminum and magnesium is increasing as the automotive industry focuses on reducing the overall weight of automotive body parts.

This trend introduces high electrical resistivity specifications on rubber parts that come into contact with aluminum and magnesium to avoid contact corrosion problems. Additionally, automotive coolants and radiator hoses can have high electrical resistivity requirements in order to avoid issues associated with electrical chemical degradation. 

Our SPHERON® 6400 and SPHERON 6000 carbon blacks are designed to deliver high electrical resistivity and good reinforcement at considerable higher parts per hundred rubber loadings than traditional American Society for Testing and Materials (ASTM) N500, 600 and N700 series carbon blacks. SPHERON 6400A and 6000A are particularly suited for high resistivity applications that also need to meet "Class A" surface finish requirements in automotive weather stripping.