Effect of tantalum content on mechanical properties of stainless steel tubes

Tantalum can form stable compounds with carbon and nonmetal elements in stainless steel tubes, which can change the mechanical properties of stainless steel tubes and improve the quality of steel, similar to niobium. At present, although the steel pipe containing tantalum is not common, but with the continuous development of national economy, steel pipe containing tantalum will be gradually widely used.

The chemical and physical properties of tantalum have been discussed in many special papers, which will not be repeated here. The basic chemical properties related to analysis methods are briefly described as follows: Compounds such as Fe2Ta formed by tantalum in stainless steel tubes can be decomposed by various inorganic acids to form tantalic acid precipitation. Tantalum and niobium have very similar chemical properties. It is easy to hydrolyze in acidic solution to generate tantalic acid precipitation. If oxalic acid or tartaric acid is added, a stable complex can be formed in the solution. In many methods for the determination of tantalum, most of the elements in tantalum and stainless steel tubes are separated out of tantalum by acid hydrolysis, and then determined by gravimetric method or colorimetric method.