Hvordan rengør platin-rhodium termoelementer?

Som en typisk termoelement er platin-rhodium termoelement gradvist blevet brugt i vid udstrækning af mennesker ., men glem ikke at vedligeholde det under brug! Redaktøren introducerer vedligeholdelsestips fra Platinum-Rhodium-termoelementer ved at indsamle information .
1) Pickling

Brug den oxiderende evne af syre til at fjerne organisk stof og andre urenheder, der kan opløses ved syre på overfladen af ​​høj-temperatur ædle metal platin-rhodium termoelementer .

Put the high-temperature precious metal platinum-rhodium thermocouple into a circle with a diameter of about 80mm and place it in a beaker. Soak it in 30%-50% (by volume) chemically pure dilute hydrochloric acid (or dilute nitric acid) for one hour, take it out and put it in a beaker, and boil it with distilled water several tider for fuldstændigt at fjerne syren . Formålet med pickling er at rengøre noget organisk stof og oxider på overfladen af ​​elektroden .

2) Natriumboratrensning

The used high-temperature precious metal platinum-rhodium thermocouple must be cleaned with sodium borate after pickling. First, hang the high-temperature precious metal platinum-rhodium thermocouple electrode on the platinum wire on the annealing cabinet, and then adjust the current to burn the thermocouple to 1100℃. Use block sodium borate to touch the hot electrode, so that the boric acid solution flows down along the electrode. After cleaning, slowly reduce the current, and finally cut off the power supply. Take out the circle with a diameter of 80 mm and put it in a beaker. Boil it with distilled water several times to completely precipitate the borate. The purpose of sodium borate removal is mainly to remove metals and oxides that are insoluble in hydrochloric acid. Because sodium borate melts at high temperature and reacts with metal impurities and metal oxides attached to the hot electrode of the high-temperature precious metal platinum-rhodium thermocouple to form a boron glass solution, it flows along the hot electrode to achieve the purpose of removing dirt on Det ydre lag af elektroden .
3) Udglødning
Udglødning er at fjerne den interne stress i elektroden, forbedre krystalfasen af ​​højtemperaturens ædle metalplatin-rhodium-termoelement og forbedre stabiliteten af ​​den høje temperatur ædle metalplatin-rhodium termoelement . Det ønskede formål kan opnås ved passende annealeretemperatur og udgange tid til {{{{}} der er normalt to metoder med Annehinding: Annehøjde: Anneh: Power-on Annealing and Furnace Annealing .
Gennem ovennævnte introduktion til rengøringsmetoden for platin-rhodium termoelement, håber jeg, det vil være nyttigt for alles arbejde og undersøgelse .