tantalum crucible Shenzhen Sunrise Metal Industry Co.,Ltd
TEL：0086-0755-27185042 or 0086-15919982500
Website：http://www.sunriseta.com
E-Mail：sales@sunriseta.com
E-Mail：sales@sunriseta.com
QQ: 1957953030
skype :sunrisetantalum
ONE OF THE MOST CORROSION RESISTANT MATERIALS AVAILABLE, EXHIBITS RESISTANCE TO ACID ATTACK COMPARABLE TO GLASS.
Tantalum is corrosion resistant, due to a tenaciously adherent oxide film akin to the entire family of passive, reactive metals. The metal has gained acceptance for use in electronics, missile technology, the chemical industry and the medical field. Tantalum is immune to attack by many acids and salt solutions. It is, however, subject to hydrogen embrittlement in alkaline solutions. It is used to fabricate heat exchangers, reaction vessels, bayonet heaters, thermo wells, surgical implants and radiation shielding. Tantalum should not be used in air at temperatures above about 300°C because of severe oxidation.
CORROSION RESISTANCE OF TANTALUM
Tantalum's resistance to corrosion by many materials is exemplified in the following Corrosion Resistance Table.
SUBSTANCE
| REACTION | |
Acetic Acid
| 20-392° (68-738°F), all concentrations: No attack | |
Air or Oxygen
| At room temperature: practically stable / Above 600°C (1112°F): formation of protective surfaces of Ta oxides | |
Aqueous Ammonia
| Practically no attack | |
Aqua Regia
| Cold and hot: practically no attack | |
Carbon (Graphite)
| At high temperatures: carbide formation | |
Carbon Dioxide
| Above 1200°C (2912°F): oxidation | |
Carbon Monoxide
| At red heat: reaction (absorption of C and O) / In high vacuum above 1400°C: formation of CO | |
Chromic Chloride Acid
| 20-100°C (68-212°F), concentrated: no attack | |
Aqueous Caustic
| Cold: practically stable / Hot: noticeable attack | |
Molten Caustic
| Stable | |
Chlorine
| at 250°C (464°F): beginning attack / Above 450°C (842°F): violent reaction | |
Ferric Chloride
| 19°C (66°F) Boiling, 5-30% concentration: no attack | |
Hydrocarbons
| Above 800-1000°C (1472-1832°F): carbide formation / Above 1400°C (2552°F): complete carburizing | |
Hydrochloric Acid
| Cold and Hot: no attack | |
Hydrofluoric Acid
| Strong Attack | |
Hydrofluoric and Nitric Acid
| Rapid dissolution | |
Hydrogen
| Above 300-400°C (572-752°F): formation of hydride / Above 1000°C (1832°F): very slight solubility of hydrogen / In high vacuum above 600-700°C (1112-1292°F): evolution of hydrogen | |
Hydrogen Peroxide
| Concentrated: good resistance to attack | |
Hydrogen Sulfide
| At red heat: sulfide formation | |
Nitric Acid
| Cold and Hot: no attack | |
Nitrogen
| Up to 150°C (302°F): no attack / Above 800°C (1472°F): nitride formation | |
Oxalic Acid
| 20-96°C (68-205°F), saturated: no attack | |
Phosphoric Acid
| 85% concentration, 145-210°C (293-410°F): no attack | |
Potassium Hydroxide
| 110°C (230°F), 5% concentration: no attack | |
Sodium Hydroxide
| 100°C (230°F), 5% concentration: no attack 100°C (230°F), 40% concentration: rapid attack | |
Steam
| At red heat: rapid oxidation | |
Sulfur Dioxide
| Up to 300°C (572°F): stable | |
Sulfuric Acid
| Cold and hot: no attack | |
Molten Metals:
| ||
Sodium
| Up to 1200°C (2192°F): resistant | |
Magnesium
| Up to 1150°C (2102°F): resistant | |
Lithium, Potassium, Lead
| Up to 1000°C (1832°F): resistant | |
Bismuth
| Up to 900°C (1652°F): resistant | |
Mercury
| Up to 600°C (1112°F): resistant | |
Zinc
| Up to 500°C (932°F): resistant | |
Gallium
| Up to 450°C (842°F): resistant | |
Refractory Oxides:
| ||
Alumina
| Up to 1900°C (3452°F): stable | |
Beryllia
| Up to 1900°C (2912°F): stable | |
Magnesia
| Up to 1800°C (3272°F): stable | |
Zirconia
| Up to 1600°C (2912°F): stable | |
Thoria
| Up to 1900°C (3452°F): stableShenzhen Sunrise Metal Industry Co.,Ltd
TEL：0086-0755-27185042 or 0086-15919982500
Website：http://www.sunriseta.com
E-Mail：sales@sunriseta.com
QQ: 1957953030
skype :sunrisetantalum
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