Lub tshuab hluav taws xob cua sov ua haujlwm yog cov khoom siv cua sov tseem ceeb hauv kev tswj dej hauv dej hiav txwv, kev lag luam hauv dej thiab kev tsim tshuaj lom neeg. Thaum raug cov dej uas muaj chloride ions, tsis muaj zog acid impurities thiab me me alkaline detergents rau lub sij hawm ntev, cov pa roj carbon zoo tib yam thiab qis -qib stainless hlau cua sov kav yog feem ntau ua rau xeb pits, raj phab ntsa perforation thiab hluav taws xob to, uas cuam tshuam ntau lawm thiab tsim kev nyab xeeb kev nyab xeeb. Ntawm ntau cov ntaub ntawv hlau siv los tiv thaiv- cov khoom siv cua sov, 316 stainless hlau tau dhau los ua cov khoom siv dav siv hauv kev lag luam. Ntau tus neeg yuav khoom thiab cov kws tshaj lij xav paub seb cov khoom siv tshwj xeeb dab tsi ua rau 316 stainless hlau kom sawv tawm ntawm lwm txoj hauv kev thiab tuav txoj haujlwm tseem ceeb hauv cov pa tiv thaiv - cov cua sov ua kom sov. Cov nqe lus no txheeb xyuas nws qhov muaj peev xwm thiab cov kev txwv, nrog rau cov lus sib piv qhia nws qhov tsis sib xws nrog rau lwm cov khoom siv cua sov.
Qhov zoo tshaj plaws ntawm 316 stainless hlau yog nyob rau hauv nws cov optimized alloy muaj pes tsawg leeg piv nrog cov feem ntau siv 304 stainless hlau. Ib qho nyiaj ntawm molybdenum tau ntxiv rau nws cov tshuaj formula, uas ua rau nws muaj zog tiv thaiv pitting corrosion tshwm sim los ntawm chloride ions-qhov tseem ceeb ua rau lub raj cua sov tsis ua hauj lwm hauv ntsev- muaj thiab cov dej khib nyiab. During repeated heating and cooling cycles, a dense and stable chromium-rich passivation film forms on the tube surface, acting as a barrier to stop corrosive substances from invading the metal substrate. Dhau li ntawm kev tiv thaiv - muaj peev xwm corrosion, 316 stainless hlau muaj qhov ruaj khov thermal expansion kev ua haujlwm. Nws yuav tsis deform, tawg los yog poob cov txheej txheem nruj nyob rau hauv ntev - lub sij hawm alternating kub hloov, zoo tiv thaiv cov kua los ntawm seeping rau hauv lub cua sov hlau thiab ua rau cov khoom puas. Cov lus hauv qab no sib piv cov ntsuas kev ua haujlwm tseem ceeb ntawm plaub lub ntsiab tiv thaiv- cov khoom siv hluav taws xob cua sov.
表格
| Khoom siv | Chloride & Weak Acid Resistance | Max ua haujlwm kub tsis tu ncua | Nruab Nrab Kev Pabcuam Lub Neej | Kev ua haujlwm nyuaj | Tus nqi tag nrho |
|---|---|---|---|---|---|
| 316 Stainless hlau | Muaj zog tiv thaiv -pitting nyhuv | 550 degree | 22–34 lub hlis | Tsawg | Nruab nrab |
| 304 Stainless hlau | Txwv tsis pub, yooj yim los tsim cov kab xeb | 420 degree | 8–12 lub hlis | Tsawg | Tsawg |
| Ntshiab Titanium | Zoo heev los tiv thaiv -corrosion muaj peev xwm | 770 degree | 36–60 lub hlis | Siab | Siab heev |
| Siab -Purity Quartz | Acid- pov thawj nkaus xwb, yooj yim rau alkali | 1180 degree | 10–18 lub hlis | Nruab nrab | Nruab nrab |
Los ntawm cov ntaub ntawv nyob rau hauv lub rooj, 316 stainless hlau ua tiav qhov zoo tshaj plaws sib npaug ntawm kev ua tau zoo thiab kev lag luam rau nruab nrab -corrosion ua hauj lwm tej yam kev mob. Rau me me thiab nruab nrab- cov lag luam loj uas muaj ntau cov khoom siv cua sov kom xa mus, titanium cua sov raj coj cov nqi xa khoom siab heev, thaum quartz cua sov raj ntsib kev poob loj los ntawm kev sib tsoo thaum lub sij hawm teeb tsa thiab kev thauj mus los. Ordinary 304 stainless hlau raj yuav tsum tau hloov ntau zaus thiab kev saib xyuas phau ntawv, sib sau ua haujlwm ntxiv thiab cov khoom siv nyiaj ntau dhau sijhawm. Nyob rau hauv sib piv, 316 stainless hlau cua sov raj tsuas yog yuav tsum tau yooj yim tu tsis tu ncua, thiab lawv mature processing technology kom ob peb cov khoom puas thaum lub sij hawm ntau lawm, zoo heev txo cov kev khiav hauj lwm nqi ntawm cua sov systems. Nws zoo heev weldability kuj tshem tawm me me qhov khoob ntawm cov pob qij txha kaw, uas yog qhov cuam tshuam tshaj plaws rau corrosive kua infiltration.
Txawm hais tias muaj kev ua tau zoo tshaj plaws, 316 stainless hlau muaj cov ciam teb meej. Nyob rau hauv ib puag ncig nrog siab -concentration kub muaj zog acid los yog tov muaj zog acid thiab alkali daws, lub nto passivation zaj duab xis yuav irreversibly puas, ua rau sai corrosion ntawm lub raj lub cev. Nyob rau hauv cov xwm txheej hnyav heev, titanium lossis PFA coated heaters yog qhov kev xaiv zoo dua. Yog tias qhov nruab nrab cua sov yog dej ntshiab deionized uas tsis muaj cov khoom xyaw corrosive txhua, xaiv 304 stainless hlau tuaj yeem ua tau raws li qhov xav tau thiab zam cov khoom siv tsis tsim nyog.
Raws li cov ntsiab lus, lub zog tseem ceeb ntawm 316 stainless hlau suav nrog kev txhim kho chloride corrosion kuj los ntawm molybdenum alloying, ruaj khov thiab thermal zog, kev ua haujlwm yooj yim thiab kev ua haujlwm zoo. Cov txiaj ntsig no ua rau nws yog cov khoom siv zoo tshaj plaws thiab txhim khu kev qha rau cov khoom siv los tiv thaiv -corrosion cua sov raj. Txawm hais tias nws tsis tuaj yeem tiv nrog ultra- qhov xwm txheej hnyav hnyav, nws tseem yog qhov ua tau zoo tshaj plaws thiab tus nqi- kev xaiv zoo rau ntau dua 85% ntawm kev lag luam thiab pej xeem me me- rau- nruab nrab corrosion cua sov xav tau.
