Yuav ua li cas xaiv cov khoom ntawmslurry twj tso kua misrau cov tshuaj lom neeg sib txawv? Cov neeg feem ntau muaj kev xav tsis zoo tias cov hlau tsis muaj steel yog cov khoom siv thoob ntiaj teb uas tuaj yeem tswj tau txhua qhov nruab nrab thiab ib puag ncig. Qhov no yog qhov txaus ntshai heev, nws tuaj yeem ua rau muaj kev sib cav sib ceg ntawm qhov me me thiab qhov xwm txheej loj tshaj plaws. Hauv qab no yog ob peb yam tshuaj lom neeg thiab lawv cov khoom xaiv.
1. Hydrochloric acid
Feem ntau ntawm cov ntaub ntawv hlau tsis resistant rau hydrochloric acid corrosion, nrog rau ntau yam stainless hlau cov ntaub ntawv, thaum lub concentration ntawm hydrochloric acid kuj siab. Molybdenum uas muaj silicon hlau tsuas yog siv rau hydrochloric acid hauv qab 50℃thiab 30%. Tsis zoo li cov khoom siv hlau, feem ntau ntawm cov khoom tsis yog-hlau cov khoom muaj corrosion kuj zoo rau hydrochloric acid, yog li lined roj hmab twj thiab cov twj yas (xws li polypropylene, fluoroplastics, thiab lwm yam) yog qhov zoo tshaj plaws kev xaiv rau thauj hydrochloric acid.
2. sulfuric acid
Raws li ib qho ntawm cov xov xwm corrosive heev, sulfuric acid yog ib qho tseem ceeb ntawm cov khoom siv raw nrog ntau yam kev siv. Lub corrosion ntawm cov ntaub ntawv sib txawv heev nrog txawv concentrations thiab kub ntawm sulfuric acid. Rau cov concentrated sulfuric acid nrog ib tug concentration siab tshaj 80% thiab kub hauv qab no 80 degree, carbon steel thiab cam khwb cia hlau muaj corrosion kuj zoo, tab sis lawv tsis haum rau siab - ceev ntws sulfuric acid.
Yog li ntawd, carbon steel thiab cam khwb cia hlau tsis haum rau lub twj tso kua mis valve cov ntaub ntawv; Txawm tias zoo tib yam stainless hlau xws li 304 thiab 316 muaj kev txwv siv rau sulfuric acid media. Yog li ntawd, cov twj tso kua mis thiab cov li qub rau kev thauj cov sulfuric acid feem ntau yog ua los ntawm cov silicon cam khwb cia hlau los yog siab alloy stainless hlau, xws li 20 alloy, ceramic twj, tab sis lawv nyuaj heev rau cam khwb cia thiab txheej txheem. Fluoroplastics muaj cov tshuaj sulfuric acid zoo, thiab siv cov fluorine lined twj yog ib qho kev xaiv pheej yig dua.
3. Nitric acid
Raws li ib tug heev oxidizing acid, feem ntau cov hlau yog sai corroded thiab puas nyob rau hauv nitric acid. Nyob rau hauv chav tsev kub, fluoroplastics thiab stainless hlau cov ntaub ntawv muaj zog corrosion kuj rau nitric acid. Nws yog ib qho tsim nyog sau cia tias molybdenum uas muaj cov hlau tsis muaj steel (xws li 316, 316L) tsis tsuas yog tsis muaj kev tiv thaiv zoo dua rau nitric acid dua li cov hlau tsis zoo (xws li 304, 321), tab sis qee zaum txawm tias qis dua. Rau siab -kub nitric acid, titanium thiab titanium alloy cov ntaub ntawv feem ntau yog siv.
4. Acetic acid
Nws yog ib qho ntawm cov corrosive tshaj plaws hauv cov organic acids. Ordinary hlau yuav corrode hnyav nyob rau hauv acetic acid nyob rau hauv tag nrho cov concentrations thiab kub. Stainless hlau yog ib yam khoom zoo heev tiv taus acetic acid, thiab 316 stainless hlau uas muaj molybdenum kuj tseem siv tau rau qhov kub thiab txias thiab dilute acetic acid vapor. Rau qhov kub thiab txias thiab siab concentration acetic acid los yog lwm yam corrosive media uas yuav tsum nruj, siab alloy stainless hlau los yog fluoroplastic twj tuaj yeem xaiv.
5. Alkali
Cov tshuaj alkali feem ntau yog sodium hydroxide. Sodium hydroxide cov kev daws teeb meem hauv qab 80℃thiab nrog cov ntsiab lus ntawm 30% tuaj yeem ua los ntawm cov ntaub ntawv hlau, thiab ntau lub Hoobkas tseem siv cov hlau zoo tib yam ntawm qhov kub qis dua 100℃thiab 75%. Txawm hais tias corrosion nce, kev lag luam zoo.
Kev tiv thaiv corrosion ntawm cov hlau tsis zoo tib yam rau cov tshuaj alkaline tsis zoo dua li cov hlau cam khwb cia, thiab nws tsis pom zoo kom siv cov hlau tsis muaj steel ntev npaum li cov hlau me me tau tso cai ntxiv rau qhov nruab nrab. Rau siab -kub alkaline daws, titanium thiab titanium alloys los yog siab alloy stainless hlau feem ntau yog siv. Feem ntau, cam khwb cia hlau twj tso kua mis yuav siv tau rau cov uas tsis muaj concentration alkaline daws nyob rau hauv chav tsev kub.
Rau cov kev cai tshwj xeeb, ntau yam tshuaj fiberglass twj, tshuaj yas twj tso kua mis, PTFE sib nqus twj, stainless hlau hlau nplaum twj, fluoroplastic sib nqus twj, siab - kub resistant magnetic twj, thiab lwm yam yuav siv tau.
6. Ammonia (ammonia hydroxide)
Feem ntau cov hlau thiab cov hlau tsis muaj xeb me me hauv cov kua ammonia thiab ammonia dej (ammonia hydroxide), tsuas yog tooj liab thiab tooj liab alloys tsis haum rau kev siv.
7 Cawv, ketones, esters, thiab lwm yam.
Cov cawv muaj xws li methanol, ethanol, ethylene glycol, propanol, thiab lwm yam; Ketones xws li acetone, butanone, thiab lwm yam; Esters xws li methyl thiab ethyl esters feem ntau tsis corrosive thiab tuaj yeem siv los ua cov khoom siv, tab sis stainless hlau yog qhov kev xaiv zoo tshaj plaws rau kev tu; Tsis tas li ntawd, nws yog ib qho tsim nyog sau cia tias ketones thiab esters muaj solubility hauv ntau hom roj hmab, yog li yuav tsum tau them nyiaj mloog thaum xaiv cov khoom sib khi.
7. Dej ntsev thiab dej hiav txwv
Rau kev tshaj tawm xws li dej hiav txwv, qhov corrosion ntawm cov hlau zoo tib yam tsis yog siab heev hauv cov tshuaj sodium chloride, dej hiav txwv, thiab dej ntsev, thiab feem ntau yuav tsum muaj kev tiv thaiv txheej; Ntau yam ntawm cov hlau tsis muaj steel kuj muaj qhov tsis zoo corrosion tsis zoo, tab sis tej zaum yuav ua rau muaj kev cuam tshuam hauv zos vim chloride ions . 316 cov khoom siv hlau stainless feem ntau nyiam.
