Can metal on metal deposition be used to prevent corrosion ?
For example , zirconium and hafnium diborides , ZrB2 and HfB2 , can be prepared through CVD of the tetrahydroborates Zr ( BH4 ) 4 and Hf ( BH4 ) 4:M ( BH4 ) 4 → MB2 + B2H6 + 5H2 Metal diborides find uses as coatings because of their hardness , high melting point , strength , resistance to wear and corrosion , and good electrical conductivity .