Q1: Dab tsi yog austenitic stainless qib feem ntau rau kev pabcuam corrosive?
A1:ASTM A312/A358 TP304/304L. 304L (tsawg carbon) yog qhov zoo dua rau kev siv welded kom txo qis rhiab heev (carbide nag lossis daus hauv HAZ) thiab tom qab intergranular corrosion.
Q2: Thaum twg peb yuav qhia TP321 lossis TP347 dhau TP304?
A2:Rau cov kev pabcuam hauv qhov ntsuas kub ntawm carbide (~425-850 degree). TP321 (Ti-stabilized) thiab TP347 (Nb-stabilized) tiv thaiv rhiab heev los ntawm kev tsim cov carbides ruaj khov, tiv thaiv kev xeb.
Q3: Peb yuav tsum tau ua kom kub sulfuric acid. Cov qib stainless hlau twg tau teev tseg?
A3:ASTM A312/A358 TP904L (UNS N08904), siab - alloy austenitic steel nrog cov npib tsib xee, chromium, thiab ntxiv tooj liab thiab molybdenum, muab kev tiv thaiv zoo heev los txo cov kua qaub.
Q4: Dab tsi duplex stainless qib muab ob zaug lub zog tawm los ntawm 304L thiab zoo heev chloride stress corrosion cracking (SCC) tsis kam?
A4:UNS S32205/S31803 (2205 Duplex). Nws muaj qhov sib xyaw austenite-ferrite microstructure, nrog ~ 450 MPa yield zog thiab superior tsis kam rau chloride SCC piv rau 300-series austenitics.
Q5: Rau corrosive hnyav, siab -chloride ib puag ncig (piv txwv li, dej hiav txwv), uas yog siv cov alloy zoo tshaj?
A5:ASTM B928/B929 Alloy 625 (Ni{3}}Cr-Mo nrog Nb) welded yeeb nkab. Nws muaj qhov tshwj xeeb pitting, crevice, thiab kev ntxhov siab corrosion cracking kuj, nrog rau siab zog.
