Tantalum cont

A variety of electrode reactions14 can occur at the anode. Some of them result in the formation of gases, corrosive attacks on most electrode materials, or oxidative attacks on the membrane in contact with the anolyte solution. Platinum is too cosily for use as an anode material, but titanium or tantalum conted with ex ire ms ly thin (mjcrainchas) layers of platinum has bean used. Lead dioxide deposited on and within graphite has been used also. Oxidation-resistant rnsmbranes (fluorocarbon-based) often are used adjacent to the anolyte solution even though they are expansive. 

Lutetium (Coni.) 72 Hafnium (CotiL) 73 Tantalum (Cont.) 74 Tungstea (Cent.) ... 

A majority of studies have been concerned with anodizing aluminum and its alloys, " " " although tantalum, " titanium, zirconium, and other transition and coinage metals have been of interest. The Italian school under Conte has been particularly active in these investigations which have mainly centered on nitrate melts, over the temperature interval 343-723 K. A bisulfate mixture is used in a Japanese commercial process. " Table 4 shows some of the melt systems that have been studied. 

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