Wire is a platinum-based rhodium-containing binary alloy, continuous solid solution at high temperature. Platinum-rhodium thermocouple, also known as high temperature precious metal thermocouple, is widely used in industry. As temperature measurement sensors, they are usually used in conjunction with temperature transmitters, regulators and display instruments to directly measure or control the temperature of fluid, vapor and gas media and solid surfaces in the range of 0 to 1800 °C in various production processes.
In the industrial production process, platinum rhodium wire thermocouple is widely used, such as petroleum, chemical, food, glass, pharmaceutical, printing and dyeing, ceramics, heat treatment and other extensive industrial fields. Because there is a wide range of applications so there is platinum rhodium wire old and new replacement, and in the platinum rhodium wire recovery without auxiliary equipment detection and how to identify the true platinum rhodium wire?
(one) fire method: take a sample, with a lighter fire in the lower part of the sample red sample for a period of time, when the sample by red natural cooling and then wipe off the black surface, if the sample color is the same as before is platinum rhodium wire, color is not.
(two) contact method: based on the characteristics of platinum-rhodium two metals, as well as our usual experience, we can use the hand repeatedly bending the hand of the sample, if the sample is soft and not easy to break that is platinum-rhodium wire. On the contrary, a broken or dead mark is identified as nickel chrome wire or wire.
(three) observation method: observe the gloss of the sample, platinum rhodium wire luster than white silver wire or iron wire brighter, plus rhodium hardness is not platinum rhodium will be softer, such as white silver wire or platinum wire.
Of course, these tips are used for temporary simple identification in the case of no detection equipment available at the side, and it is appropriate to detect the equipment when there is detection equipment.
