PLATINIZED TITANIUM ANODE

 

GENERAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Titanium relies on the formation of a strong adhering oxide film to give it corrosion resistance in most electrolytes. Titanium itself will act as a conductor of current without passing current into the electrolyte.

 

With the application of a thin layer of platinum onto the titanium surface the current will pass along the titanium and enter the electrolyte through the platinum surface with the exposed surfaces of the titanium remaining inactive. The usual thickness of platinum, which is electroplated onto the titanium is 5 microns. The platinized area of the anode will operate at current densities of up to 100 amperes per square ft. of surface area.

 

The electrical resistance of titanium is high and where solid rods or plates are used it is essential to design with adequate cross sections of titanium and with the shortest current paths to the platinum surface, thus avoiding high volt drops.

 

Where long lengths of platinized titanium are required to improve the electrical resistance, titanium is formed over copper and the platinum skip-plated onto the titanium. This provides the most economic installation with the best relationship between current density and volt drop.

It is recommended that rectifier 3 phase AC is used and the voltage between anode and electrolyte should be less than 10 volts.

 

Platinized titanium anodes are suitable for used in impressed current system for jetties, pipelines protected by deep well groundbeds, power stations and water storage tanks.