Tswv yim
Kev sib txuas ruaj khov ntawm cov kav dej tooj liab muaj zog heev, ua rau lawv siv tau ntau dua. Vim tias muaj ntau hom kav dej ntawm kev ua lag luam, lub interface fittings feem ntau yog cov kav dej tooj liab. Txawm hais tias qee qhov yeeb nkab tuaj yeem ua tsis tau tooj liab fittings, yuav tsum muaj tooj liab haum ntawm qhov sib txuas nrog lub faucet. Txawm li cas los xij, yog tias cov yeeb nkab tooj liab txuas nrog rau lwm cov kav dej, lub cev thiab cov khoom siv hluav taws xob ntawm thermal expansion thiab contraction yog txawv heev vim yog cov khoom sib txawv ntawm cov kav dej thiab fittings, thiab qhov ruaj khov ntawm kev sib txuas yuav raug rau cov teeb meem ntxiv. Yog li ntawd, kev sib txuas ntawm cov kav dej tooj liab thiab cov khoom siv tooj liab yuav ua rau muaj kev ruaj ntseg zoo heev.
Daim ntawv thov
Daim ntawv thov ntawm cov kav dej tooj liab yog qhov dav dua li cov hlau ntshiab. Txhua xyoo, 50% ntawm tooj liab yog electrolytically purified rau hauv cov tooj liab ntshiab siv rau hauv kev lag luam hluav taws xob. Cov tooj liab hais ntawm no yuav tsum yog cov ntshiab heev, nrog rau cov ntsiab lus tooj liab ntau dua 99.95%. Ib qho me me ntawm impurities, tshwj xeeb tshaj yog phosphorus, arsenic, txhuas, thiab lwm yam, yuav txo tau qhov conductivity ntawm tooj liab. Cov ntsiab lus ntawm cov pa oxygen hauv tooj liab (me me ntawm cov pa oxygen yooj yim sib xyaw thaum lub sij hawm tooj liab smelting) muaj kev cuam tshuam zoo rau kev ua haujlwm. Tooj liab siv hauv kev lag luam hluav taws xob feem ntau yuav tsum yog tooj liab tsis muaj oxygen. Tsis tas li ntawd, impurities xws li txhuas, antimony, thiab bismuth yuav tiv thaiv cov crystals ntawm tooj liab los ntawm kev sib txuas ua ke, ua rau kub brittleness thiab cuam tshuam rau kev ua cov tooj liab ntshiab. Cov tooj liab ntshiab uas muaj purity siab yog feem ntau refined los ntawm electrolysis: impure tooj liab (piv txwv li tooj liab crude) yog siv raws li anode, ntshiab tooj liab yog siv raws li cathode, thiab tooj liab sulfate tov yog siv raws li cov electrolyte. Thaum qhov tam sim no dhau mus, cov tooj liab tsis huv ntawm lub anode maj mam yaj, thiab cov tooj liab ntshiab maj mam precipitates ntawm cathode. Cov tooj liab ua kom zoo li no tuaj yeem ncav cuag purity ntawm 99.99%. Liab tooj liab yog ib hom tooj liab dawb, uas feem ntau tuaj yeem suav tias yog tooj liab ntshiab. Nws muaj zoo conductivity thiab plasticity, tab sis tsis muaj zog thiab hardness.
