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在初步筛选试验中,我们研究了一些材料的加工性能和腐蚀性能,这些材料都可作为钽的代用品用在腐蚀性很强的化学工业中。铌和锆易于加工,但在沸腾的70%和75%的硫酸中迅速腐蚀。铪的腐蚀不那么严重,但抗腐蚀能力不如钽,而且难于加工。钽—铌二元合金的抗腐蚀能力介于钽和铌之间,易于加工成材,很可能用作抗腐蚀材料。在钽—铌二元合金中添加第三种元素,得不到任何改善,而且在某些情况下还损害合金的抗腐蚀性能。
In a preliminary screening test, we studied the processing and corrosion properties of some materials that can be used as tantalum substitutes in highly corrosive chemical industries. Niobium and zirconium are easy to process but rapidly corrode in boiling 70% and 75% sulfuric acid. Hafnium corrosion is not so serious, but corrosion resistance than tantalum, and difficult to process. The corrosion resistance of tantalum-niobium binary alloys, between tantalum and niobium, makes them easy to process into materials that are likely to be used as corrosion-resistant materials. The addition of the third element to the tantalum-niobium binary alloy gives no improvement and in some cases also damages the corrosion resistance of the alloy.