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TABLE 2 - CORROSION DATA of NIOBIUM in AQUEOUS MEDIA, CONT., P. 4
FeCI3 10 RT-boiling nil
Fe+3 12% with 6 HCI 66 nil
Solutions Concentration (Weight%) Temp. (°C) Corrosion Rate mm/y (mpy)*
HgCI2 saturated boiling 0.0025 (0.1)
H2SiF6 10 90 5.0 (200)
HSO3NH2 10 boiling 0.025 (1.0)
K2C03 1-10 RT 0.025(1.0)
K2C03 10-20 98 Embrittle
K3P04 10 RT 0.025 (1.0)
MgCI2 47 boiling 0.025 (1.0)
NaCI saturated and pH =1 boiling 0.025 (1.0)
NaCI 5% with 0.5% Acetic Acid 100 nil
Na2CO3 10 RT 0.025 (1.0)
Na2CO3 10 boiling 0.5 (20)
Na2HSO4 40 boiling 0.125 (5.0)
NaOCI 6 50 1.25 (50)
Na3PO4 5-10 RT 0.025 (1.0)
Na3PO4 2.5 98 Embrittle
NH4CI 40 boiling 0.025 (1.0)
NH2SO3H 10 boiling 0.025 (1.0)
NiCI2 30 boiling nil
Ni(N03)2 40 104 0.025 (1.0)
ZnCI2 40-70 boiling nil
ZrCI4 70 boiling nil
ZrCI4 88 boiling nil
Miscellaneous      
Bromine liquid 20 nil
Bromine vapor 20 0.025 (1.0)
Chrome Plating 25% Cr03, 12% H2S04 92 0.125 (50)
Seawater natural boiling nil
Chrome Plating 17% Cr03, 2% Na2SiF6, 92   0.125 (5.0)
  trace H2S04    
Solution H20      
H202 30 RT 0.025(1.0)
H202 30 boiling 0.5 (20)

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INDEX  •  CORROSION RESISTANCE PROPERTIES  •  FABRICATION   
NIOBIUM PRODUCTS   •  SPECIFICATIONS of NIOBIUM   
NIOBIUM ELECTRONICS APPLICATIONS