Hexavalent chromium in corrosion preventive coatings of unpainted metal sheetings and fasteners used for corrosion protection and electromagnetic interference shielding in equipment falling under category three of directive 2002 / 96 / ec ( it and telecommunications equipment ) 用于防腐或屏蔽电磁干扰，涂在特定仪器设备中（欧盟指令2002 / 96 / ec条款3规定为it和电信设备）的金属片或金属扣件上防腐涂层中的六价铬。
