ASTM A790 S31803, S32205, S32750, S32760
Cov qauv tshuaj pab txo qis cov hlau zoo li 304 (1.4301) thiab cov hlau ferritic zoo li 430 yog yooj yim rau kev ua thiab ua kom zoo. Raws li lawv cov npe hais, lawv muaj feem ntau ntawm ib theem, austenite lossis ferrite. Txawm hais tias cov hom no tau zoo rau ntau cov ntawv thov, muaj qee qhov kev siv txuj ci tseem ceeb hauv ob hom.
Cov kav dej dulex yog stainless kav uas muaj cov nyiaj ntau ntawm chromium thiab tsawg kawg ntawm ob npib tsib. Lub kav dej dulex muab lub zog loj thiab tiv taus rau cov chaw ua kom haum. Duplex kav yog siv nyob rau hauv cov nroj tsuag desalination, kev pauv hluav taws xob, thiab cov txheej txheem ua tub rog.
Rau ntau cov ntawv thov uas 300 series stainless hlau yog qhov raug rau cov chloride kev ntxhov siab tawg, 2205 duplex stainless hlau yog qhov kev daws teeb meem zoo. Kev ntxhov siab corrosion tawg tshwm sim thaum stainless hlau yog raug rau tensile muaj kev ntxhov siab thaum sib cuag nrog cov kev daws teeb meem uas muaj chlorides. Kev kub siab dua kub kuj nce ntxiv qhov kev ua kom muaj kev phom sij ntawm cov hlau tsis muaj mob corrosion.
Lub corrosion tsis kam los ntawm kev sib ntxiv ntawm cov ntaub ntawv alloy, feem ntau cov ntsiab lus chromium. Lub ASTM A790 kav yog cov tiv taus pitting corrosion thiab cov pob txha corrosion. Cov kav dej kuj tseem yuav muaj hluav taws xob hluav taws xob welded.
Stainless hlau yog ib qho alloy ntawm cov hlau uas tiv taus xeb. Nws muaj tsawg kawg yog 11% chromium thiab tej zaum yuav muaj cov ntsiab lus xws li carbon, lwm yam tsis yog lwm yam kom tau lwm yam uas xav tau. Stainless hlau qhov tsis kam rau corrosion tau los ntawm cov chromium, uas ua cov yeeb yaj kiab passive uas tuaj yeem tiv thaiv cov khoom thiab kho tus kheej nyob rau hauv lub xub ntiag ntawm oxygen.
