Kev nkag siab yooj yim ntawm kev xaiv cov khoom sib nqus yog sib koom ua ke hauv ntau lub tebchaws. Kev ua haujlwm kub ntawm NdFeB cov khoom yog qis dua 150 degree, thiab qhov kub ntawm cov khoom siv SmCo yog qis dua 250 degree. Aluminium ferrite tuaj yeem siv rau micro-twj. Lub twj tso kua mis lub cev cov khoom tau muab faib ua ob pawg: hlau thiab tsis yog hlau.
Hlau stainless hlau tsis txhais hais tias nws yog stainless rau tag nrho cov kua, nws yog tsuas yog siv rau cov txheej txheem ua kua, precious kua, ultra-ntshiab kua uas yog sib xws nrog nws.
Nonmetals yog tsim tshwj xeeb rau kev siv corrosive. Nws muab faib ua 2 rooj plaub. Ib qho yog lub twj tso kua mis ntshiab, thermoplastic molded los ntawm cov ntshiab polypropylene los yog ethylene fluoride. Qhov thib ob yog txheej hauv lub twj tso kua mis, uas yog ib txoj hauv kev nrov ntawm cov hnab yas rau cov twj siv tshuaj tiv thaiv corrosion.
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