Immersion hluav taws xob cua sov raj yog qhov tseem ceeb rau kev tswj hwm kev tswj dej hauv dej hiav txwv, cov zaub mov pickling kua cua sov, kev lag luam circulating dej thiab dej khib nyiab preprocessing. Cov kua dej no feem ntau muaj cov chloride ions, cov organic acids tsis muaj zog thiab cov kab mob alkaline. Cov kav dej cua sov ua los ntawm cov pa roj carbon steel lossis qib qis -qib stainless hlau sai sai tsim cov qhov pitting thiab phab ntsa nkag, ua rau muaj kev pheej hmoo ntawm hluav taws xob tawm thiab kev ncua kev tsim khoom tsis tau npaj tseg. Raws li cov khoom siv tseem ceeb los tiv thaiv -corrosion alloy khoom, 316 stainless hlau tau ntev los ua txoj haujlwm tseem ceeb hauv kev ua lag luam ntawm cov khoom siv los tiv thaiv-corrosion cua sov raj. Cov neeg yuav khoom thiab cov kws tshaj lij ua haujlwm feem ntau xav qhia meej txog nws cov khoom siv tshwj xeeb zoo piv nrog titanium, quartz thiab PFA cua sov cov ntsiab lus, nrog rau nws cov khoom siv thiab cov kev tsis zoo hauv kev siv tiag tiag. Cov ntawv sau no txheeb xyuas nws cov kev ua tau zoo thiab kev txwv tsis pub siv nrog lub rooj sib piv tus qauv.
Lub hauv paus kev txhim kho los ntawm dav siv 304 stainless hlau nyob rau hauv qhov sib ntxiv ntawm molybdenum nyob rau hauv cov alloy muaj pes tsawg leeg. Molybdenum muaj zog tiv thaiv pitting corrosion tshwm sim los ntawm chloride ions, tus thawj culprit tom qab cua sov raj tawg nyob rau hauv brine thiab dej khib nyiab ua hauj lwm ib puag ncig. Thaum lub sij hawm cyclic cua sov thiab txias txheej txheem, ib tug compact chromium oxide passivation txheej ntaub ntawv nyob rau hauv cov yeeb nkab sab nrauv, ua raws li ib tug barrier kom tsis txhob corrosive tshuaj los ntawm invading lub hlau puag. Ntxiv mus, 316 stainless hlau nta ruaj khov thermal expansion thiab contraction tus cwj pwm. Nws zam cov txheej txheem tawg thiab deformation mus tas li nyob rau hauv lub sijhawm kub hloov pauv, lav kev ruaj ntseg sealing thiab tiv thaiv cov kua infiltration uas kub hnyiab tawm hauv cov cua sov ua haujlwm.
表格
| Qeb khoom | Chloride & Weak Acid Resistance | Max Ntev -Lub Sijhawm Ua Haujlwm Kub | Nruab Nrab Kev Pabcuam Lub Neej | Machining nyuaj | Tus nqi tag nrho |
|---|---|---|---|---|---|
| 316 Stainless hlau | Muaj zog tiv thaiv - pitting muaj peev xwm | 550 degree | 22–34 lub hlis | Tsawg | Nruab nrab |
| 304 Stainless hlau | Cuam tshuam rau chloride corrosion | 420 degree | 7–12 lub hlis | Tsawg | Tsawg |
| Ntshiab Titanium | Exceptional corrosion kuj | 770 degree | 36–58 lub hlis | Siab | Siab heev |
| Siab -Purity Quartz | Acid- tsuas yog tiv taus, raug rau alkali yaig | 1170 degree | 9–17 lub hlis | Nruab nrab | Nruab nrab |
Cov ntaub ntawv cov ntaub ntawv pov thawj tias 316 stainless hlau muab qhov zoo sib npaug ntawm kev pabcuam kev ua haujlwm thiab tus nqi nyiaj txiag nyob rau hauv lub teeb thiab nruab nrab corrosion. Rau cov lag luam me thiab nruab nrab uas xav tau loj - teev cov khoom siv cua sov layout, bulk procurement ntawm titanium cua sov raj tsim hnyav upfront peev. Quartz cua sov raj yog nkig heev thiab nquag tawg thaum lub sijhawm xa khoom, kev teeb tsa thiab tu, ua rau cov nqi hloov pauv ntxiv. Standard 304 stainless hlau kav xav tau kev kaw ntau zaus rau kev hloov thiab tu, ua haujlwm ntxiv thiab cov khoom siv nyiaj ntau dhau sijhawm. Nyob rau hauv sib piv, 316 stainless hlau boasts mature dabtsi yog khoov thiab vuam cov tswv yim, minimizing micro gaps ntawm kaw pob qij txha yooj yim rau cov kua corrosion. Kev saib xyuas niaj hnub tsuas yog xav tau qhov yooj yim ntawm qhov chaw so, txiav cov nqi ua haujlwm tag nrho ntawm cov tshuab cua sov.
Txawm hais tias nws qhov kev ua tau zoo- sib npaug, 316 stainless hlau muaj qhov txwv kev siv. Thaum immersed nyob rau hauv siab -kub concentrated muaj zog acid los yog tov kua qaub-alkali daws rau ncua sij hawm, nws nto passivation zaj duab xis raug kev txom nyem irreversible kev puas tsuaj, ua rau ceev ceev yeeb nkab phab ntsa corrosion thiab scrappage. Nyob rau hauv cov xwm txheej hnyav li no, titanium lossis PFA- cov khoom siv hluav taws xob ua haujlwm tau zoo dua li kev hloov pauv. Yog hais tias qhov nruab nrab rhuab yog cov dej ntshiab deionized tsis muaj corrosive impurities, xaiv 304 stainless hlau siab txaus siab rau cov cua sov xav tau thiab tshem tawm cov khoom tsis tsim nyog cov nqi pov tseg.
Txhawm rau kom ua tiav, 316 stainless hlau ruaj ruaj nws txoj haujlwm tseem ceeb hauv cov pa tiv thaiv - xeb cua sov ua tsaug rau molybdenum- ntxiv cov tshuaj chloride corrosion, ruaj khov thiab ua haujlwm thermal, ua haujlwm yooj yim thiab zoo heev. Txawm hais tias nws tsis tuaj yeem tiv taus ultra- mob hnyav rau kev lag luam, nws tseem yog tus nqi tshaj plaws - cov khoom siv tau zoo thiab muaj kev ntseeg siab rau ntau dua 80% ntawm pej xeem thiab kev lag luam hluav taws xob hluav taws xob uas cuam tshuam nrog me me mus rau nruab nrab corrosion.
