Platinum rhodium alloy is a platinum based binary alloy containing rhodium, which is a continuous solid solution at high temperatures. Rhodium can improve the thermoelectric potential, oxidation resistance, and acid corrosion resistance of alloys to platinum. A platinum alloy composed of platinum as the base and rhodium added. Below the solidus line is a continuous solid solution. E. Raub from Germany predicted the existence of a solid-phase decomposition zone similar to that in the platinum iridium system, with a critical temperature of about 780 ℃, but it has not yet been confirmed. It is a platinum based binary alloy containing rhodium, which is a continuous solid solution at high temperatures. Rhodium can improve the thermoelectric potential, oxidation resistance, and acid corrosion resistance of alloys to platinum. Alloys greater than 20% Rh are insoluble in aqua regia. Use a high-frequency or intermediate frequency furnace to protect the melting process with argon gas. Alloys below 20% Rh can be fully cold worked into materials; Alloys greater than 20% Rh are formed by hot and cold working; PtRh70 alloy is fully formed by hot working. Mainly used as thermocouple materials, including PtRhl0/Pt, PtRh13/Pt, etc. It also serves as a catalyst, crucible, and nozzle, high-temperature heating element, electrical contact, and spark plug electrode. As a winding material
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