Ib tus neeg cog lus ze Hamburg xajHastelloy C2000 phaj, 6 hli, rau 40% sulfuric acid tank, 20 xyoo tsim lub neej. Cov lus nug ntawm RFQ tsis yog dab tsi alloy siv - uas twb tau hais lawm - tab sis seb 6 hli tawm hlau txaus tom qab tsis zoo corrosion. Cov lus teb yog qhov sib npaug yooj yim, tab sis feem ntau cov neeg yuav khoom nres ntawm Haynes corrosion- cov lus ntsuas thiab tsis txhob tig mus rau hauv phab ntsa - tuab tuab. Nplooj ntawv no qhia tus lej lej.
Cov khoom nyob rau hauv ib lub rooj
Table 1 - Hastelloy C2000 phaj specification kab (ASTM B575, tov-annealed)
|
Yam khoom |
Tus nqi |
|
UNS / W. Nr. |
N06200 / 2.4675 |
|
Chemistry |
Ni bal, Cr 22.0–24.0, Mo 15.0–17.0, Cu 1.3–1.9, Fe Tsawg dua lossis sib npaug 3.0, Co Less dua lossis sib npaug 2.0, Mn Less dua lossis sib npaug 0.50, Si Less dua lossis sib npaug 0.08, C Sess dua 01 lossis sib npaug 0.010 ib |
|
Mechanical (phaj, chav temp) |
690 MPa tensile min / 310 MPa yield min / 45% elongation min |
|
Qhov ntom |
8.50 g / cm³ |
|
Melting ntau |
1,370–1,410 degree |
|
Kev kho cua sov |
Kev daws anneal 1,050-1,150 degree, txias ceev |
|
PREN |
~76 (Cr + 3.3Mo + 16N, N≈0) |
|
Cov qauv sib xws |
B575 phaj / ntawv / sawb; B619 welded yeeb nkab; B622 seamless yeeb nkab; B366 khoom |
Chemistry yog cov khoom. 22-24% chromium tuav oxidizing acids, 15-17% molybdenum tuav txo cov chlorides, thiab 1.3-1.9% tooj liab qaij lub alloy mus rau sulfuric acid kuj. Nws yog Cu ntxiv uas cais C2000 los ntawm C276 ntawm ib daim ntawv teev cov ntaub ntawv.
Corrosion- cov ntaub ntawv tus nqi: qhov pib
Haynes International luam tawm 24-teev cov ntaub ntawv immersion rau cov kua-annealed C2000. Rau kev tsim sulfuric acid, cov kab ntsig yog:
Table 2 - Hastelloy C2000 phaj corrosion tus nqi nyob rau hauv sulfuric acid (mm/xyoo, tov-annealed)
|
H₂SO₄ concentration |
24 degree |
50 degree |
75 degree |
100 degree |
Boiling |
|
10% |
<0.025 |
<0.025 |
<0.025 |
<0.025 |
0.09 |
|
20% |
<0.025 |
<0.025 |
<0.025 |
0.03 |
0.18 |
|
40% |
<0.025 |
<0.025 |
<0.025 |
0.05 |
0.42 |
|
60% |
<0.025 |
<0.025 |
0.02 |
0.16 |
1.13 |
|
80% |
<0.025 |
<0.025 |
0.07 |
0.37 |
0.91 |
|
96% |
<0.025 |
<0.025 |
<0.025 |
0.05 |
0.19 |
Cov no yog qhov ntsuas qhov ntsuas ntawm cov qauv huv. Cov tso tsheb hlau luam tiag tiag pom cov cua sov ua kom sov, tso nyiaj, pib- chim siab thiab qee zaus chloride nqa- dhau. Ib thaj tsam ntawm 2-3 × yog kev saib xyuas rau kev tsim.
Cov txheej txheem corrosion- nyiaj pub dawb
Txhawm rau txhim kho corrosion tsis zoo, qhov yuav tsum tau muaj kev tiv thaiv corrosion yog:
Corrosion allowance (mm)=corrosion rate (mm/y) × design life (y) × field factor
ASME VIII-1 tsis tau teeb tsa qhov laj thawj; nws yog qhov kev txiav txim siab qhov project. Kev coj ua zoo tshaj plaws rau cov khoom siv tsis tau tshem tawm yogField factor=2.0thiab tsim lub neej=20 xyoo. Yog tias cov khoom siv tshuaj xyuas tau thiab hloov tau, qhov txiaj ntsig ntawm 1.5 yuav raug lees txais.
Table 3 - Corrosion allowance xam piv txwv: 40% H₂SO₄, 75 degree, 20-xyoo lub neej
|
Tswv yim |
Tus nqi |
|
Kev pabcuam |
40% H₂SO₄, 75 degree |
|
C2000 phaj lab tus nqi |
<0.025 mm/y (use 0.025) |
|
Field factor |
2.0 |
|
Tsim lub neej |
20 y |
|
Yuav tsum muaj kev tiv thaiv corrosion |
0.025 × 20 × 2.0 = 1.0 hli |
|
Yam tsawg kawg nkaus (qhov project) |
3.0mm ib |
|
Tshwj xeeb nominal thickness |
6.0mm ib |
|
Qhov seem phab ntsa tom qab 20 xyoo |
6.0 − 1.0 = 5.0mm ib |
Rau qhov no, 6 mm yog dav. Tab sis yog hais tias qhov kub nce mus rau boiling 40% acid, tus nqi dhia mus rau 0.42 mm / y thiab cov nyiaj yuav tsum tau ua 16.8 mm ua ntej lub teb yam. Tias yog vim li cas tib cov kua qaub ntawm ob qhov sib txawv ntawm qhov sib txawv tuaj yeem txav lub phaj thickness ntau tshaj 10 hli.
C2000 vs C276 vs C22 phaj: nqi ib hli poob
Qhov kev tiv thaiv corrosion tsuas yog ib nrab ntawm qhov kev txiav txim. Lwm ib nrab yog dab tsi txhua millimeter ntawm cov nqi hlau poob, vim tias cov alloys tsis corrode ntawm tib tus nqi thiab tsis raug nqi tib yam.
Table 4 - Phaj alloy piv rau sulfuric acid kev pabcuam (qhia)
|
Alloy |
UNS |
H₂SO₄ 40%, 75℃tus nqi (mm/y) |
20-y pub nyiaj, F=2 (mm) |
Tus nqi phaj txheeb ze |
Tus nqi ib hli poob (indexed) |
|
Hastelloy C2000 |
N06200 |
0.025 |
1.0 |
1.25 |
1.0 |
|
Hastelloy C276 |
N10276 |
0.08 |
3.2 |
1.20 |
3.0 |
|
Hastelloy C22 |
N06022 |
0.06 |
2.4 |
1.30 |
2.6 |
|
904L |
N08904 |
0.50 |
20.0 |
0.35 |
Tsis siv tau |
|
316L |
S31603 |
>2.0 |
>80 |
0.10 |
Tsis siv tau |
Lub rooj yog yooj yim - tus nqi sib txawv nrog impurities, ntws thiab weld mob - tab sis cov lus yog meej: rau kub, txo sulfuric acid, C2000 tus nqi qis corrosion tuaj yeem ua pov thawj nws tus nqi siab dua vim tias qhov yuav tsum tau muaj corrosion tsawg dua. Rau kev pabcuam oxidizing chloride, qhov kev sib piv hloov mus rau C22. Rau ntshiab txo HCl, C276 feem ntau yeej.
Hydrochloric acid ciam teb
C2000 tseem ua haujlwm HCl zoo dua C276 ntawm qhov tsis tshua muaj siab, tab sis tus nqi nce nrawm nrog kub:
Table 5 - Hastelloy C2000 phaj corrosion tus nqi hauv hydrochloric acid (mm/xyoo)
|
HCl concentration |
24 degree |
50 degree |
Boiling |
|
1% |
<0.025 |
<0.025 |
0.05 |
|
5% |
<0.025 |
0.05 |
0.13 |
|
10% |
<0.025 |
0.08 |
0.25 |
|
20% |
0.05 |
0.13 |
0.51 |
Rau boiling 10% HCl, 20- xyoo pub ntawm F=2 yuav yog 10 hli. Yog vim li cas HCl kev pabcuam saum toj no kwv yees li 50℃feem ntau thawb tus qauv mus rau C-22 lossis B-3 es tsis yog C2000, txawm tias C2000 qhov kev ua tau zoo sulfuric-acid.
Specs, qhov ntau thiab tsawg thiab nqi band
C2000 phaj yog muab kev daws teeb meem -annealed thiab pickled, feem ntau3-50 hlituab nyob rau hauv dav 1,000/1,200/1,500/2,000 mm thiab ntev mus rau 6,000 mm. Txias{11}}rolled sheet khiav0.5-6 hli. Kev kam ua raws li ASTM B575 / ASTM A480. Qhov taw qhia FOB Tuam Tshoj tus nqi yogUSD 18-32 / kgnyob ntawm thickness thiab txiav txim kom muaj nuj nqis. Tus nqi taug qab cov kab nickel ntxiv rau molybdenum thiab cobalt surcharges.
FAQ
Q: Qhov txawv ntawm Hastelloy C2000 thiab C276 phaj yog dab tsi?
A: C2000 ntxiv 1.3–1.9% tooj liab rau Ni-Cr-Mo puag, uas txhim kho kev tiv thaiv sulfuric acid thiab qee cov kua qaub sib xyaw. C276 nqa ntau molybdenum (15-17% vs C2000's 15-17% band zoo sib xws) thiab tungsten, muab kev tiv thaiv zoo rau kub hydrochloric acid. Rau sulfuric acid, C2000 feem ntau yeej; rau HCl, C276 feem ntau yog siv nyiaj zoo dua.
Q: Kuv puas tuaj yeem siv Haynes corrosion- tus lej ncaj qha hauv ASME VIII-1?
A: Tsis yog. Cov lej luam tawm yog 24-teev qhov ntsuas qhov ntsuas qhov ntsuas. Cov qauv tsim cov cai yuav tsum muaj kev tiv thaiv corrosion uas suav nrog cov khoom lag luam, kev cuam tshuam ntawm vuam, pib- nce kev ntxhov siab thiab kev tshuaj xyuas lub sijhawm. Muab cov nqi kuaj los ntawm qhov project-txhais tau, feem ntau 1.5–3.0.
Q: Puas yog Hastelloy C2000 phaj weldable?
A: Yog, nyob rau hauv cov kev daws teeb meem -annealed mob siv txuam ERNiCrMo-17 los yog ERNiCrMo-4 muab tub lim, nyob ntawm seb koj xav kom cov weld kom phim C2000 los yog lean mus rau C276 chemistry. Khaws qhov ntsuas kub hauv qab 150℃thiab siv cov roj argon rov qab los ntawm cov hauv paus hniav.
Q: Kuv yuav tsum txheeb xyuas dab tsi ntawm MTR rau C2000 phaj?
A: Txheeb xyuas cov pa roj carbon tsawg dua lossis sib npaug ntawm 0.010%, tooj liab 1.3–1.9%, molybdenum 15.0–17.0%, thiab cov phaj tau muab rau hauv cov tshuaj -annealed mob. Ib qho G28A intergranular corrosion test tshwm sim feem ntau ntxiv rau kev pabcuam acid tseem ceeb.
Q: Thaum twg C2000 phaj tsis yog qhov kev xaiv zoo?
A: Rau cov khoom muaj zog oxidizing chlorides xws li cov chlorine ntub dej los yog ferric chloride, C22 los yog C276 outperform C2000. Rau kev ua haujlwm ntev - lub sijhawm ua haujlwm siab tshaj li 650℃, khoom- cov qib nickel daws xws li 600 lossis 800H zoo dua. Rau cov ntshiab caustic, Nickel 201 yog qhov kev xaiv pheej yig dua.
Yuav koom tes nrog peb li cas?
kawg koj cov kua qaub concentration, kub, tsim lub neej thiab yam tsawg kawg nkaus structural thickness raumarket@htpipe.com. Peb muab Hastelloy C2000 phaj rau ASTM B575, peb yuav xam qhov kev tiv thaiv corrosion los ntawm cov ntaub ntawv luam tawm, thiab peb yuav qhia rau koj paub meej yog tias C276 lossis C22 phaj yog lub neej qis dua - voj voog - tus nqi xaiv rau koj cov kua qaub.
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