Corrosion Resistance ntawm Alumina Ceramic hauv ob sab phlu

Alumina ceramic hauv ob sab phlu muajzoo heev corrosion kujnrog rau cov tshuaj muaj zog heev ruaj khov, thiab tuaj yeem tswj tau zoo corrosion kuj nyob rau hauv feem ntau cov kua qaub, alkali, ntsev media thiab tshuaj corrosion ib puag ncig. Txawm li cas los xij, lawv cov nyhuv corrosion kuj txawv nrog cov ntsiab lus alumina, hom nruab nrab thiab kev pabcuam kub, nrog rau kev ua yeeb yam tshwj xeeb raws li hauv qab no:

Corrosion Resistance rau Acid Media

Alumina ceramic hauv ob sab phlu cib muaj qhov zoo corrosion tsis kamtsis yog -oxidizing acids(xws li hydrochloric acid, dilute sulfuric acid, phosphoric acid) nyob rau hauv chav tsev kub, thiab yuav luag tsis muaj tshuaj tiv thaiv tshwm sim. Tab sis nyob rau hauv siab - kub los yog concentrated oxidizing acid ib puag ncig (xws li concentrated sulfuric acid, concentrated nitric acid, aqua regia), lawv nto yuav corroded maj mam, tshwj xeeb tshaj yog rau hauv ob sab phlu cib nrog alumina cov ntsiab lus qis dua 95%, tus nqi corrosion yuav ceev. Piv txwv li, nyob rau hauv dilute hydrochloric acid nyob rau hauv chav tsev kub, tus nqi corrosion ntawm 99% alumina ceramics yog tsawg tshaj li 0.01mm / xyoo, thaum nyob rau hauv concentrated sulfuric acid ntawm 100 degree, tus nqi corrosion nce mus rau 0.1-0.5mm / xyoo.

Corrosion Resistance rau Alkaline Media

Alumina ceramics muaj kev ruaj ntseg zoo nyob rau hauv tsis muaj zog alkalis ntawm chav tsev kub (xws li dilute sodium hydroxide tov, ammonia dej), tab sis nyob rau hauvsiab - kub thiab muaj zog alkaliIb puag ncig (xws li molten sodium hydroxide, concentrated potassium hydroxide tov), ​​alumina yuav hnov ​​​​mob chemically nrog alkalis los ua aluminate, ua rau maj mam yaig ntawm hauv ob sab phlu cib nto. Yog li ntawd, alumina ceramic hauv ob sab phlu yuav tsum tau siv ceev faj hauv kev ua haujlwm nrog cov alkali muaj zog thiab kub siab, lossis ntau dua alkali- cov ntaub ntawv tiv taus xws li silicon carbide ceramics yuav tsum raug xaiv.

Corrosion Resistance rau ntsev Media

Rau cov tshuaj ntsev ntau (xws li sodium chloride, calcium chloride, magnesium sulfate, thiab lwm yam), alumina ceramic hauv ob sab phlu tuaj yeem tiv taus lawv ntawm ob chav sov thiab nruab nrab - qhov kub thiab txias (tsawg dua lossis sib npaug li 100 degree), tsis muaj teeb meem xws li kev tawg, oxidation lossis electrochemical corrosion. Qhov no kuj yog ib qho laj thawj tseem ceeb rau lawv txoj kev siv dav hauv cov tshuaj ntsev los yog ntsev tov ua haujlwm hauv mining, tshuaj thiab lwm yam lag luam.

Kev cuam tshuam ntawm Alumina Cov ntsiab lus ntawm Corrosion Resistance

Qhov siab dua cov ntsiab lus ntawm alumina, lub zog compactness thiab tshuaj stability ntawm cov ceramic, thiab qhov zoo dua corrosion kuj . 92% alumina ceramic hauv ob sab phlu cib tuaj yeem ua tau raws li cov cai ntawm cov pa tsis muaj zog acid, tsis muaj zog alkali thiab ntsev ua haujlwm; 95%. siab -purity alumina ceramics nrog ntau dua 99.5% alumina tuaj yeem siv tau rau lub sijhawm luv luv hauv qee qhov kub-kub acid ua haujlwm.