Hastelloy B2 thiab Hastelloy B3 yog ob qho tib si npib tsib xee-molybdenum alloys paub txog lawv zoo heev tiv thaiv corrosion nyob rau hauv ib puag ncig hnyav heev, tshwj xeeb tshaj yog nyob rau hauv kev txo cov xov xwm. Txawm li cas los xij, muaj qee qhov sib txawv tseem ceeb ntawm ob lub alloys:
1. Kev sib xyaw:
- Hastelloy B2: Nws muaj nickel (Ni) cov ntsiab lus ntau dua 65%, nrog cov ntsiab lus tseem ceeb molybdenum (Mo) (kwv yees li 28-30%). Nws kuj muaj me me ntawm lwm cov ntsiab lus xws li hlau (Fe), cobalt (Co), chromium (Cr), thiab tungsten (W).
- Hastelloy B3: Nws yog qhov hloov kho version ntawmHastelloy alloy B2. Thaum nws tseem muaj cov ntsiab lus nickel thiab molybdenum siab, nws muaj cov ntsiab lus txo qis ntawm qee yam impurities xws li hlau thiab chromium, uas paub tias txo nws txoj kev tiv thaiv corrosion. Qhov kev hloov kho no txhim kho nws cov kev tiv thaiv corrosion hauv ib puag ncig tshwj xeeb.
2. Corrosion Resistance:
- Hastelloy B2 UNS N10665: Nws muab kev tiv thaiv zoo rau ntau yam kev txo cov kua qaub, suav nrog hydrochloric acid, sulfuric acid, thiab phosphoric acid. Txawm li cas los xij, nws yuav tsis tsim nyog siv rau hauv qee qhov chaw oxidizing heev.
- Hastelloy B3 UNS N10675: Nws muaj kev txhim kho corrosion kuj piv rau B2, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig txo qis nrog tsawg dua ntawm corrosion vim impurities. Nws yog qhov tshwj xeeb zoo rau cov ntawv thov uas muaj hydrochloric acid, sulfuric acid, thiab lwm yam muaj zog txo cov kua qaub.
3. Kev siv:
- B2: Hastelloy alloy B2 feem ntau yog siv rau hauv daim ntawv thov uas txo cov acids thiab ib puag ncig uas tsis kam rau pitting, kev nyuaj siab corrosion cracking, thiab corrosion los ntawm ntshiab sulfuric acid yuav tsum tau.
- B3: Hastelloy alloy B3 tshwj xeeb yog tsim los rau cov ntawv thov uas muaj hydrochloric acid thiab lwm yam muaj zog txo cov kua qaub. Nws yog feem ntau siv rau hauv kev ua tshuaj, tshwj xeeb tshaj yog nyob rau hauv lub xub ntiag ntawm txo cov xov xwm.
4. Fabrication:
- Ob leeg nickel alloy B2 thiab B3 yog ib qho yooj yim rau fabricate thiab weld, ua rau lawv haum rau ntau yam kev tsim khoom.
Hauv cov ntsiab lus, thaum ob qho tib si Hastelloy B2 thiab B3 muab kev tiv thaiv corrosion zoo heev hauv kev txo qis ib puag ncig, Hastelloy B3 yog ib qho kev txhim kho nrog kev txhim kho hauv cov cheeb tsam tshwj xeeb, tshwj xeeb tshaj yog cov uas muaj hydrochloric acid. Kev xaiv ntawm ob lub alloys yuav tsum yog raws li cov kev sib tw corrosion tshwj xeeb thiab cov xwm txheej ntawm daim ntawv thov.
