The corrosion resistance of tantalum metal against metal melts

What is Tantalum?

Tantalum is a sensible choice whenever high corrosion resistance is required. Even though tantalum is not one of the noble metals, it is comparable to them in terms of chemical resistance. When exposed to air, tantalum forms a very dense oxide layer (Ta2O5) which protects the base material from aggression. This oxide layer, therefore, makes tantalum corrosion-resistant.

Tantalum metal: Corrosion Resistance Against Metal Melts

Tantalum is resistant to a series of metal melts such as Ag, Bi, Cd, Cs, Cu, Ga, Hg, K, Li, Mg, Na, and Pb, provided that these melts have a low oxygen content. However, the material is affected by Al, Fe, Be, Ni and Co.

Tantalum metal: Corrosion resistance against metal melts

Aluminum (AL)

not resistant

Lithium (Li)

resistant at < 1000 °C

Beryllium (Be)

not resistant

Magnesium (Mg)

resistant at < 1 150 °C

Lead (Pb)

resistant at < 1000 °C

Sodium (Na)

resistant at < 1000 °C

Cadmium (Ca)

resistant at < 500 °C

Nickel (Ni)

not resistant

Caesium (Cs)

resistant at < 980 °C

Mercury (Hg)

resistant at < 600 °C

Iron (Fe)

not resistant

Silver (Ag)

resistant at < 1200 °C

Gallium (Ga)

resistant at < 450 °C

Bismuth (Bi)

resistant at < 900 °C

Potassium (K)

resistant at < 1000 °C

Zinc (Zn)

resistant at < 500 °C

Copper (Cu)

resistant at < 1300 °C

Tin (Sn)

resistant at < 260 °C

Cobalt (Co)

not resistant


Chemical reactions arise very quickly when base materials such as tantalum are brought into contact with noble materials such as platinum. You should therefore take careful account of the behavior of tantalum in contact with other materials present in the system, especially when working at high temperatures.


Thank you for reading our article and we hope it can help you learn how to improve the properties of tantalum metal well. If you want to know more about tantalum metal and other refractory metals, we would like to advise you to visit Stanford Advanced Materials (SAM) for more information.

Stanford Advanced Materials (SAM) is a worldwide supplier of tantalum products and has over two decades of experience in the manufacture and sale of tantalum metal products, offering high-quality tantalum metals to meet customers' R&D and production needs. As such, we are confident that SAM will be your favorite tantalum metal supplier and business partner.

About the author

Chin Trento

Chin Trento holds a bachelor’s degree in applied chemistry from the University of Illinois. His educational background gives him a broad base from which to approach many topics. He has been working with writing advanced materials for over four years in Stanford Advanced Materials (SAM). His main purpose in writing these articles is to provide a free, yet quality resource for readers. He welcomes feedback on typos, errors, or differences in opinion that readers come across.

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