Chemical Resistance of Tungsten

Hydrochloric Acid Resistant to attack
Sulphuric Acid Resistant to attack
Nitric Acid Resistant to attack
Aqua Regia – cold Resistant to attack
Hydrofluoric Acid Resistant to attack
Caustic Soda, Aqueous Solution Resistant to attack
Ammonia to 700 °C Resistant to attack
Mercury / Mercury Vapor Resistant to attack
Air / Oxygen to 400 °C Resistant to attack
H2O Resistant to attack
Hydrogen Resistant to attack
Nitrogen Resistant to attack
Carbon Monoxide to 800 °C Resistant to attack
Hydrogen / Chloride Gas to 600 °C Resistant to attack
Air / Oxygen above 400 °C Reacts under certain conditions
Ammonia with H2O2 Reacts under certain conditions
Ammonia above 700 °C Reacts under certain conditions
Sulphur – molten, boiling Reacts under certain conditions
Carbon Monoxide above 800 °C Reacts under certain conditions
Chlorine above 250 °C Reacts under certain conditions
Hydrogen Sulphide at red heat Reacts under certain conditions
Aqua Regia – warm to hot Not resistant to attack
Hydrofluoric / Nitric mix Not resistant to attack
KNO3, KNO2,
KClO3,
Not resistant to attack
PbO2 Not resistant to attack
Sodium Nitrite – molten Not resistant to attack
Carbon above 1400 °C Not resistant to attack, forms carbide
Aluminum Oxide Not resistant to attack, forms oxide
Magnesium Oxide Not resistant to attack, forms oxide
Thorium Oxide Not resistant to attack, forms oxide
H2O vapor at red heat Not resistant to attack, forms oxide
CO2 above 1200 °C Not resistant to attack, forms oxide
Sulphur Dioxide at red heat Not resistant to attack, forms oxide
Fluorine Not resistant to attack
Bromine Not resistant to attack
Iodine Not resistant to attack
Nitric Acid – hot Not resistant to attack
Carbon Disulphide at red heat Not resistant to attack