Platinum Metals Review - Volume 4, Issue 3, 1960

The technique of cathodic protection is well known and has been widely applied to a number of corrosion problems. It is not so well known that corrosion can also be prevented in suitable cases by anodic protection, using a platinum electrode system. The author shows that, with adequate laboratory work beforehand and proper instrumentation, the use of anodic protection can make an effective contribution to the life of a chemical plant.

In this paper the authors describe their determination of the tensile strength and ductility of iridium at temperatures up to 2000° C. The tensile strength of iridium at high temperatures, in the presence of carbon vapour, compares favourably with those of tungsten, molybdenum, tantalum and niobium, all of which are attacked to a much greater degree by the carbon.

A new type of platinum resistance thermometer, constructed with ceramic insulating materials, is described. It may be maintained in continuous operation at temperatures up to 850°C for many hundreds of hours.

In this paper, a communication from the Johnson Matthey Research Laboratories, an investigation of the equilibrium diagram of the ruthenium-palladium system by microscopical and X-ray methods is described. It is established that the diagram is of the simple peritectic type. No intermediate phases or eutectoid transformations of the types recently reported by Russian workers have been observed.