Electrically conductive layer deposits are emerging as a new corrosion concern in electric motors in hybrid and electric vehicles, and developing tests to better evaluate such corrosion is important, a Lubrizol official said during a presentation at an SAE International online event last week.
Senior Research Chemist Gregory Hunt leads corrosion research activities across Lubrizol Transportation. Speaking at SAE International’s World Congress Experience Digital Summit held April 13-15, Hunt said that understanding conductive layer deposits is critical to designing lubricants for electrified devices. He said the issue exists primarily where copper wire in a motor winding becomes exposed due to either the manufacturing process or a wire coating failure during operation. Windings are coiled wire that create a magnetic field.