Cov hlau muaj ntau txaus los tsim cov npib tab sis tsawg txaus kom tsis yog txhua tus tuaj yeem tsim tau. Kub tsis corrode, muab lub khw muag khoom ruaj khov ntawm tus nqi khw muag khoom ntawm tus nqi Ib lub khw ntawm tus nqi yog qhov tseem ceeb khoom vaj khoom tsev, khoom muag, lossis txiaj uas tuaj yeem khaws cia, khaws cia, thiab pauv yav tom ntej tsis deteriorating nyob rau hauv tus nqi. … Kub thiab lwm yam hlau yog cov khw muag khoom muaj nqis, vim lawv lub txee lub neej tseem ceeb nyob mus ib txhis. https://www.investopedia.com ›term › storeofvalue
Khw Muag Khoom Muaj nuj nqis - Investopedia
thiab tib neeg yog lub cev thiab lub siab xav rau nws. Cov zej zog thiab kev lag luam tau tso tus nqi ntawm kub, yog li ua rau nws muaj nqis.
Vim li cas kub thiaj kim?
Kub yog hlau. Thiab zoo li txhua yam hlau, nws yog muab rho tawm hauv av thiab ces purified. Kub yog kim vim tus nqi siab ntawm kev tsim khoom nrog nws. Tsis tas li ntawd, kub yog nrov heev, uas ua rau nws tus nqi nce ntxiv.
Vim li cas kub thiaj kim dua hlau?
Nws yog tib yam nrog cov hlau muaj txiaj ntsig - kub yog ib yam tsis tshua muaj, yog li nws muaj txiaj ntsig ntau dua li cov khoom xws li hlau.
kub nce nqi li cas?
Tus nqi ntawm kub yog txav los ntawm kev sib xyaw ntawm cov khoom siv, kev thov, thiab tus cwj pwm ua lag luam … Piv txwv li, ntau tus tub ua lag luam xav tias kub yog qhov txiaj ntsig nyiaj txiag. Qhov ntawd muaj qee qhov kev nkag siab zoo, vim tias daim ntawv nyiaj poob nqi ntau dua li luam tawm, thaum cov khoom kub yog qhov tas li.
Vim li cas kub thiaj li muaj nuj nqis?
Kub muaj cov yam ntxwv ntawm lub cev uas ua rau nws muaj nuj nqis heev. Kub yog tus txiv neej tshaj plaws thiab ductile ntawm tag nrho cov hlau… Kub muaj qhov corrosion siab tshaj plaws ntawm tag nrho cov hlau thiab nws tsuas yog corroded los ntawm kev sib xyaw ntawm nitric thiab hydrochloric acid. Kub yog hlau zoo vim nws tsis oxidize.
