Platiniridiumstang

Platiniridiumstang refers to an alloy composed primarily of platinum and iridium, formed into a rod or bar shape. This alloy is known for its exceptional hardness, corrosion resistance, and high melting point. The addition of iridium to platinum significantly increases its strength and rigidity, making it suitable for applications where pure platinum would be too soft or deformable.

The precise ratio of platinum to iridium can vary depending on the intended use. Alloys with a higher percentage of iridium are generally harder and more resistant to chemical attack. Historically, platiniridium alloys have been employed in critical scientific and industrial applications. For instance, they have been used in the manufacture of laboratory equipment, such as crucibles and electrodes, which require inertness and durability under extreme conditions.

Another significant application of platiniridium alloys, often in specific forms like wires or points, was in the production of the standard meter and kilogram prototypes. The stability and resistance to degradation of these alloys were crucial for maintaining international measurement standards. While newer materials have largely superseded platiniridium for metrology, its historical importance highlights its unique properties. The term "stang" simply denotes the common form it takes, a rod or bar, distinguishing it from wire or other fabricated shapes.