Iridium coatings: Do you know it all?
09 February 2017
What is the common theme that unites rocket engines, heavy metal ion sensors, spark plug electrodes, microelectronics and precision glass moulding? The answer is iridium; these are all potential application areas for iridium coatings as a protective layer from the impact of high temperatures.
If you are in the coatings or electroplating industry, don’t miss the article “Iridium Coating: Processes, Properties and Application” published by Wang-ping Wu from Changzhou University, China and Zhao-feng Chen from Nanjing University of Aeronautics and Astronautics, China in the new issue of the Johnson Matthey Technology Review.
The article reviews the use of iridium coating to protect against oxidation and corrosion in high-temperature environments. The authors describe the properties and behaviours of iridium and application areas of iridium coatings. They also give a comparative review of the quality of iridium coatings for a variety of deposition processes.
Coating techniques such as CVD (chemical vapour deposition) and ALD (atomic layer deposition) use Ir(2,4-pentanedionate)3 as the iridium precursor. Electroplating is a reliable, lower cost process which uses iridium precursors such as chloriridic acid, available from Johnson Matthey Chemical Products (product code 161001).
Full article “Iridium Coating: Processes, Properties and Application Part I”, The Johnson Matthey Technology Review, 2017, 61, (1), 16