GROUP 7 VANADION.....NIOBION.......PRASEON......TANTALON VANADIUM......NIOBIUM....PRASEODYMIUM....TANTALUM

THE CORROSION and SHOCK RESISTANT                                   STEEL PLATING and ALLOY METALS

THESE METALS ARE USED TO MAKE,   RAILROAD RAILS GANTRY CRANES ELECTRO-PLATED TOOLS ELECTRICAL POWER RECTIFIERS        THEIR CLORIDES and OCSIDES ARE USED AS        COLORANTS IN PRINTERS INKS and WOOD STAINS