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Platinised titanium is a useful material for a wide range of applications. It is available in rods, sheets, tubes and ribbons with a variety of dimensions.
The most obvious application is cathodic protection in power stations and in electrochlorinators. Its high electrical conductivity, low thermal expansion and relatively small resistance to heat make it a suitable candidate for such applications.
It is also suited for electrolysis of sea water for the production of chlorine and caustic alkali, hypochlorite or chlorate. Its excellent conductivity is enhanced by the application of a thin layer of platinum which functions as the anode of the cell in which it is fitted.
However, the coating of platinum by electrodeposition on refractory metals is not a simple process. It requires a preroughening with the formation of reentrant angles and a strong Van der Waal attraction, otherwise it can be difficult to form a good mechanical bonding between the coating and the titanium.
A refractory-oxide metal, titanium is an extremely difficult substrate on which to electrodeposit coatings. It is therefore a good idea to preroughen it to a high degree before the platinisation.
The coating of platinum by electrodeposition on refractory-oxide metals is not a simple process. The coating of platinum by electrodeposition on a porous substrate is particularly attractive as an electrode material for industrial electrochemical processing and energy storage applications, since the highly porous nature of such substrates provides a significant increase in active surface area.