Those involved in non-destructive testing may come across iridium192 as an isotope in radiography. It is one of the mixed metals in mixed metal oxide coated titanium anodes for impressed current cathodic protection. It is the most corrosion-resistant metal known, and was used in making the standard meter bar of Paris, which is a 90 percent platinum and 10 percent iridium alloy. Despite its corrosion resistance, you are most likely to come across iridium indirectly. It does corrode under some conditions. Understanding the mechanisms of corrosion enables more appropriate … It is the most corrosion-resistant metal known and it resists attack by any acid. Iridium, a metal of the platinum family, is white (similar to platinum) but with a slight yellowish cast. Recent progress in methods of fabricating iridium and ruthenium has focused attention on their special properties of high melting points and resistance to chemical attack. Also, because the amount on the threads is low, the damage to the female thread in the cylinder is reduced. Once, gold and platinum were considered to be the exemplars of the pure metals, however, studies have proven that iridium is much better in resisting corrosion than any other metal. The second is to coat the tip and strap with a more corrosion-resistant metal such as platinum and iridium, and that's exactly what many manufacturers do. In practice, alloys containing more than 3% iridium show a great resistance to attack, unless they are in the form of a very fine powder. Gold, as well as the platinides feature very high resistance to corrosion, even against acids. in concrete form. It features the three most important properties of value retention. D. W. Rhys and E. G. Price have now reported (Metal Ind., 1964 (August 20th), 243-245) the results … Iridium is generally credited with being the second densest element (after osmium) based on measured density, although calculations involving the space lattices of the elements show that iridium is denser. Iridium is the most corrosion resistant metal of all precious metals, and it has high stability. Such coatings reduce the damage caused by oxidation and enhance plug life, but they don't do anything for performance or fuel economy. Despite its corrosion resistance, you are most likely to come across iridium indirectly. Iridium radioisotopes are used in some radioisotope thermoelectric generators. Iridium metal is employed when high corrosion resistance at high temperatures is needed, as in high-performance spark plugs, crucibles for recrystallization of semiconductors at high temperatures, and electrodes for the production of chlorine in the chloralkali process. Its resistance to corrosion has made it valuable for compass bearings, fountain pen tips, and the International Porotype Meter Stick. Highly Corrosion Resistant, Burnished Nickel Plating Burnished nickel plating on the housing, a high level of corrosion resistance has been realized.

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