Tantalum has excellent chemical properties and high corrosion resistance. Under both cold and hot conditions, there is no reaction to hydrochloric acid, concentrated nitric acid, or "aqua regia.". Immersion of tantalum in sulfuric acid at 200 ℃ for one year resulted in only 0.006mm damage to the surface layer. Experiments on tungsten plates, molybdenum plates, tungsten rods, molybdenum rods, tungsten tubes, molybdenum tubes, tungsten crucibles, and molybdenum crucibles have shown that tantalum rods have no effect on alkali solutions, chlorine gas, bromine water, dilute sulfuric acid, and many other agents under normal conditions, but only react with hydrofluoric acid and hot concentrated sulfuric acid. Such situations are relatively rare in metals.

The characteristics of tantalum make its application fields very broad. In equipment for producing various inorganic acids, tantalum can be used as a substitute for stainless steel, and its service life can be dozens of times longer than that of stainless steel. In addition, in the chemical, electronic, electrical, and other industries, tantalum can replace the tasks previously undertaken by the precious metal platinum, greatly reducing the cost.

In addition, tantalum is an important element in refining high-strength steel, corrosion resistant steel, and heat resistant steel alloys, and can provide special materials necessary for the development of space technology such as rockets, spacecraft, and jet aircraft. Non magnetic alloys made of tantalum and tungsten are widely used in the electrical industry, especially tantalum carbide, which is composed of tantalum and carbon. It has a great hardness and is comparable to diamond even under high conditions. Tungsten plate, molybdenum plate, tungsten rod, molybdenum rod, tungsten tube, molybdenum tube, tungsten crucible, molybdenum crucible A turning tool made of it can cut many hard alloys at high speed; Various drill bits made of it can replace the hardest alloy or diamond. Therefore, tantalum is also considered a "vitamin" in smelting.