Qhov txawv ntawm alloy 28 thiab alloy 825 yog dab tsi?
1.4563 - Alloy 28 - Sanicro - N08028
Muaj los ntawm Tshuag!
High Nickel Super Austenitic Stainless Hlau
UR 28 yog super-austenitic stainless hlau nrog nickel siab heev (31%) thiab chromium (27%) cov ntsiab lus. Cov ntsiab lus molybdenum yog kwv yees li 3.5%. Cov hlau yog tsim los rau kev siv tshwj xeeb, suav nrog kev siv sulfuric thiab phosphoric acid.
Nws ua tau zoo tshwj xeeb hauv qhov chaw sulfuric thiab phosphoric acid, txawm tias muaj cov tshuaj chloride thiab fluoride. Cov ntsiab lus siab nickel txhim kho nws txoj kev tiv thaiv kev ntxhov siab corrosion cracking.
Kev sib xyaw ua ke ntawm chromium thiab molybdenum pab txhawb kev txhim kho hauv zos corrosion kuj.
UR 28 ua tau zoo dua li Alloy 825 thiab tej zaum yuav raug suav hais tias yog lwm txoj hauv kev rau qib 625 kim dua hauv qee qhov kev siv (cov roj qaub). Lub alloy yog dav siv nyob rau hauv tshuaj thiab offshore daim ntaub ntawv, nrog rau cov av qaub heev.
Corrosion kuj:
Alloy UR 28 yog corrosion resistant ntau dua Alloy UR 904L (N08904) nyob rau hauv feem ntau corrosive daws. Cov hlau no tau siv dav hauv kev siv phosphoric acid thiab qee cov tshuaj sulfuric acid.
Alloy UR 28 kuj tuaj yeem siv rau hauv cov tshuaj caustic vim nws cov ntsiab lus molybdenum tseem qis dua piv rau cov nickel thiab chromium ntxiv.
Qhov sib ntxiv ntawm cov chromium siab thiab cov nyiaj nruab nrab ntawm molybdenum pab txhim kho lub zos corrosion kuj ntawm UR 28 alloy. Qib no ua tau zoo dua li Alloy 825 thiab kuj zoo dua Alloy N08904 (UR 904L) hauv cov tshuaj uas muaj cov kua qaub chlorides.
Lub siab nickel thiab molybdenum cov ntsiab lus muab UR ™ 28 zoo heev tiv thaiv kev ntxhov siab corrosion tawg. Qhov no yog qhov tseeb tshwj xeeb rau cov ntawv thov kub (140 - 400 degree=284 - 752 degree F) thiab cov tshuaj chlorine uas muaj ib puag ncig.
UR 28 yog tshwj xeeb tshaj yog haum rau kev siv roj qaub thiab tau ua tiav kev sim ntawm 230 degree (446 degree F), 3 bar H2S thiab 50 bar CO2 nrog rau cov ntsiab lus chloride siab.
daim ntawv thov:
UR 28 alloy tau ua tiav siv hauv cov ntawv thov hauv qab no:
• Ntau lawm, concentration thiab siv cov phosphoric acid cov tshuaj tiv thaiv tso tsheb hlau luam, impellers, piping systems, cyclone evaporators, deg coolers, ncig twj, stirrers, superphosphoric acid reservoirs, tshav kub exchanger shells/tubes
• Kev tsim thiab siv cov sulfuric acid: cov khoom siv cua sov, cov tshuaj tiv thaiv tank, stirrers, reactor inlet kav ...
• Roj thiab roj ntau lawm: kev siv roj qaub, cov kav dej, cov khoom sib cais...
• Ntau yam khoom siv offshore platform
• Kev lag luam tshuaj (acetic acid, vinyl chloride)
