C68700 Aluminium Brass Tube Dezincification Performance: 15-xyoo Marine Field Report

ASTM B111 C68700 txhuas tooj dag rajtxwv dezincification kom tsawg dua 0.025 hli hauv ib xyoos.Tom qab 15 xyoo nyob rau hauv qhov tseeb seawater txias tshuab, raj qhia tsawg tshaj li 0.4 hli qhov tob tob. Daim ntawv tshaj tawm no suav nrog cov ntaub ntawv xeem, kev ua haujlwm hauv cheeb tsam, thiab kev yuav khoom pom zoo los ntawm GNEE (Tuam Tshoj).

Dezincification yog kev xaiv leaching ntawm zinc los ntawm tooj dag alloys, tawm hauv qab tsis muaj zog, ntxeem tau tooj liab.Rau cov tooj dag zoo tib yam (C27000, C36000), qhov no ua rau lub qhov dej ntws tawm hauv 2-5 xyoos hauv dej hiav txwv.

C68700 txhuas tooj dag raj daws qhov teeb meem nolos ntawm kev ntxiv 1.5-2.5% aluminium. Cov txhuas ua cov yeeb yaj kiab tiv thaiv oxide uas thaiv zinc los ntawm kev tawg.

Cov ntaub ntawv tseem ceeb:ASTM G48 kuaj pom C68700 dezincification qhov tob =0.025mm / xyoo siab tshaj. Txheem tooj dag=0.20–0.30 mm/xyoo. Qhov ntawd yog8-10 npaug zoo dua.

GNEE (Tuam Tshoj) kuaj C68700 seamless raj rau ASTM B111 thiab ASTM G48 (tus qauv tooj liab alloy dezincification). Cov xwm txheej: dej hiav txwv dag, 50 degree, 365 hnub.

Xaus:C68700 txhuas tooj dag raj khaws cov qauv kev ntseeg siab tom qab 1 xyoos. Txheem tooj dag poob tshaj 20% ntawm phab ntsa thickness.

Lub tshuab hluav taws xob nyob rau hauv ntug dej hiav txwv Tuam Tshoj (GNEE cov neeg siv khoom) tau teeb tsaASTM B111 C68700 Tubesnyob rau hauv 2010. Seawater tej yam kev mob: kub 25–35 degree, ntws tshaj tawm 2.5 m/s, chlorides 25,000 ppm. Kev tshuaj xyuas tau ua nyob rau ntawm 5, 10, thiab 15 xyoo.

Cov txiaj ntsig ntawm qhov tseeb:Tom qab 15 xyoos, qhov tob tshaj plaws dezincification nkag mus yog 0.41 hli. Thawj phab ntsa thickness yog 2.0 hli.Phab ntsa seem=1.59 hli- tseem zoo tshaj qhov tsawg kawg nkaus yuav tsum tau (1.0 hli rau 3.5 MPa siab).

Txawm tias muaj C68700 qhov kev ua haujlwm siab, qee yam kev mob nce corrosion.Cov neeg yuav khoom yuav tsum zam cov no:

Yog tias koj lub kaw lus muaj qee yam ntawm cov xwm txheej no, qhianano{0}} kho C68700los ntawm GNEE. Nano-kev kho mob ntxiv 40% corrosion kuj (kuaj rau ASTM G48).

Cov neeg yuav khoom feem ntau nug: * "Kuv puas yuav tsum siv C68700, C70600 (CuNi 90/10), lossis C23000 (xiav tooj liab)?"*

GNEE kev pom zoo:Rau dej hiav txwv,C68700 txhuas tooj dag raj muaj qhov zoo tshaj plaws dezincification tsis kam rau ib duas siv.C70600 yog overkill rau feem ntau lub tshuab.

Txhua batch ntawmASTM B111 C68700 Covlos ntawm GNEE tau txais cov kev kuaj xyuas zoo no:

Tshuaj ntsuam xyuas(raws li ASTM E1473) - Paub meej Al: 1.5-2.5%, Zn: 19-22%

Kev ntsuam xyuas microscopic(100–500x) – Txheeb xyuas beta-theem faib

ASTM G48 dezincification xeem- 14-hnub kev ntsuas nrawm, qhia qhov tob hauv mm / xyoo

Hydrostatic xeem(6.0 MPa yam tsawg kawg nkaus) - Txheeb xyuas tsis muaj qhov xau

Eddy tam sim no xeem(ASTM E243) - Tshawb xyuas cov pinholes thiab tawg

Cov neeg yuav khoom tuaj yeem thov daim ntawv pov thawj zeb (EN 10204 3.1)nrog tag nrho cov kev xeem. Thib peb-kev tshuaj xyuas tog (SGS, BV, Lloyds) muaj nyob ntawm tus nqi ntxiv.

GNEE (Tuam Tshoj) khoom sivASTM B111 C68700 seamless rajhauv cov kab no:

Tshuag loj(OD 12-50 hli, phab ntsa 2-5 hli) nkoj hauv 7-10 hnub. Custom size: 20-25 hnub.

Q1: Puas yog ASTM B111 C68700 puas nres dezincification?
A: Tsis yog, tab sis nws qeeb nws qis dua 0.025 hli hauv ib xyoos - muaj kev nyab xeeb rau 20+ xyoo.
Tsis muaj tooj dag tag nrho nres dezincification. C68700's aluminium ntxiv txo tus nqi ntawm 0.25 hli / xyoo (tus qauv tooj dag) kom qis dua 0.025 hli / xyoo. Lub 2.0 hli phab ntsa raj poob tsuas yog 0.5 hli tom qab 20 xyoo. Rau xoom dezincification, xaiv C70600 tooj liab nickel (tsis muaj zinc ntsiab lus) - tab sis nws raug nqi 70% ntau dua.

Q2: C68700 sai npaum li cas dezincify hauv cov dej tsis huv?
A: 0.04–0.06 mm/xyoo nyob rau hauv sulfide- dej qias neeg – tseem muaj kev nyab xeeb rau 10–15 xyoo.
GNEE tau kuaj C68700 cov qauv los ntawm Suav chaw nres nkoj nrog 0.3 ppm H₂S. Dezincification qhov tob yog 0.052 hli / xyoo tom qab 3 xyoos. Tus qauv tooj dag ua tsis tiav hauv 8 lub hlis. Rau cov pa phem hnyav, thov GNEE's nano- kho C68700 (tus nqi poob rau 0.03 mm / xyoo).

Q3: Dab tsi yog qhov kub siab tshaj plaws rau C68700 kom tsis txhob nrawm dezincification?
A: 60℃rau kev ua haujlwm tas mus li, 80℃intermittent.
Tshaj 60 degree, zinc diffusion accelerates. Ntawm 80 degree, dezincification tus nqi ob npaug rau 0.05 hli / xyoo. Ntawm 100 degree, tus nqi triples rau 0.075 mm / xyoo. Yog tias koj cov dej hiav txwv siab tshaj 60 degree, hloov mus rau C70600 (CuNi 90/10) lossis siv nano{12}} kho C68700 nrog kev tshuaj xyuas txhua xyoo.

Q4: Kuv puas tuaj yeem siv C68700 rau dej brackish (dej + seawater mix)?
A: Yog - C68700 yog qhov zoo tshaj plaws rau cov dej khib nyiab.
Cov dej khib nyiab muaj cov tshuaj chloride qis (5,000-15,000 ppm) thiab txawv pH. GNEE muab C68700 raj rau Suav dej txias qhov system. Tom qab 8 xyoo, dezincification qhov tob tsuas yog 0.18 hli. Tsis txhob haus dej cawv nrog cov pa phem (hnyav hlau, sulfides) - siv nano{10}} kho version.

Q5: Kuv yuav tshuaj xyuas cov raj C68700 rau dezincification li cas?
A: Siv eddy tam sim no kuaj (ECT) rau ASTM E243.
ECT kuaj pom cov phab ntsa thinning thiab localized dezincification yam tsis tau tshem cov hlab. Rau cov txheej txheem tshiab, tshuaj xyuas xyoo 5, tom qab ntawd txhua 3-5 xyoos. Yog tias qhov nruab nrab qhov tob tshaj 0.5 hli lossis qhov tob tshaj plaws tshaj 1.0 hli, npaj hloov. GNEE muab cov kev pabcuam tshuaj xyuas rau cov neeg siv khoom uas twb muaj lawm.

Q6: Dab tsi phab ntsa thickness kuv yuav tsum tau qhia rau 20-xyoo lub neej?
A: 2.5 hli yam tsawg kawg nkaus rau dej hiav txwv, 2.0 hli rau dej tshiab los yog nano{2}} kho.
Kev suav: 20 xyoo × 0.025 hli / xyoo=0.5 hli poob. Ntxiv 1.5 hli rau kev ruaj ntseg siab thiab kev tsim ua siab ntev. Tag nrho=2.0 hli. Rau cov dej tsis huv (0.05 hli / xyoo), siv 2.5 hli. GNEE pom zoo 2.5 hli rau txhua daim ntawv thov dej hiav txwv - tsawg tus nqi nce ntxiv rau kev nyab xeeb tseem ceeb.

Q7: Puas yog C68700 xav tau ib qho kev tshaj tawm - kev kho kev teeb tsa los tiv thaiv dezincification?
A: Tsis yog - aluminium oxide zaj duab xis tsim ib txwm nyob hauv 2-4 lub lis piam hauv dej hiav txwv.
Do not apply coatings or inhibitors – they block oxide film formation. However, avoid stagnant seawater during startup. Maintain flow >0.5 m / s rau thawj lub hlis los tsim kom muaj cov yeeb yaj kiab ruaj khov. Tom qab cov ntawv ua yeeb yaj kiab, C68700 tiv thaiv nws tus kheej.

Q8: Yuav ua li cas GNEE lav dezincification tsis kam ntawm cov raj xa khoom?
A: Txhua pawg suav nrog ASTM G48 daim ntawv tshaj tawm nrog daim ntawv pov thawj zeb.
GNEE lub chaw soj nstuam tswj kev ua tau zoo ua haujlwm 14-hnub nrawm dezincification kuaj ntawm txhua tus lej kub. Qhov siab tshaj plaws tso cai qhov tob=0.03 hli / xyoo (GNEE tus qauv sab hauv, nruj dua ASTM's 0.05 mm / xyoo). Cov neeg yuav khoom tau txais daim ntawv ntsuam xyuas nrog kev xa khoom. Yog tias lub raj tsis ua haujlwm (ua pov thawj los ntawm lub chaw kuaj thib peb), GNEE hloov cov batch.

Txhua lub raj hauv ntau qhov no tau dhau qhov thib peb - tog neeg pom kev tshuaj xyuas raws li ASTM B111 tus qauv rau C68700 alloy. Hauv qab no yog cov duab tiag tiag los ntawm cov neeg siv khoom- kev tshuaj xyuas ntawm qhov chaw, suav nrog kev ntsuas tam sim no thiab kev txheeb xyuas qhov ntev.

Cov khoom tshawb xyuas tau lees paub:
• Eddy tam sim no kuaj (ECT) – tsis dhau los ntawm - phab ntsa tsis xws luag
• Sab nraud txoj kab uas hla & phab ntsa thickness - nyob rau hauv ± 0.02mm kam rau ua
• Nto tiav & temper (O61) - ua raws li ASTM
• Hardness & tshuaj muaj pes tsawg leeg – tau ntawv pov thawj.

Tom qab kev soj ntsuam dhau lawm, tag nrho cov raj tau ntim raws li cov qauv xa tawm thiab cov neeg siv khoom - cov cai tshwj xeeb. Cov txheej txheem ntim khoom tau sau tseg hauv qab no kom paub meej txog kev taug qab thiab kev puas tsuaj - pub dawb.

Ntim cov kauj ruam qhia hauv video & duab:
1. Tube tu & ziab
2. Cov kaus mom yas kawg ntawm ob qhov kawg
3. VCI los tiv thaiv- xeb daim ntawv qhwv
4. Bundle strapping nrog noo noo barrier zaj duab xis
5. Plywood ntoo rooj plaub (ISPM-15 raws) nrog ua npuas ncauj padding
6. Daim ntawv lo nrog ASTM qib, ntau tus lej, thiab cov ntawv tshuaj ntsuam xyuas

Tag nrho cov raj ASTM C68700 yog tsim thiab tshuaj xyuas ntawm peb hauv - cov khoom siv hauv tsev, tso cai rau tag nrho cov txheej txheem tswj los ntawm billet casting mus rau qhov kawg packing.

Cov khoom siv tseem ceeb siv rau ntau qhov no:
• Induction melting rauv - precision alloying (Cu + Zn + Al + As)
• Kab rov tav nruam casting – ib yam li cov qauv billet
• Extrusion xovxwm (800T / 1630T) – seamless raj txoj kev
• Txias kos duab lub rooj ntev zaum (5–40m) - qhov tseeb qhov tseeb rau ± 0.02mm
• Online eddy tam sim no tester (FOERSTER / MAC) - 100% NDT
• Ultrasonic phab ntsa thickness ntsuas - tiag - xyuas lub sij hawm
• Lub qhov cub tawg (tswj cua) – kub O61

Hauv -house metrology: Micrometers, pin gauges, optical comparator, hardness tester (HV/HRB)

Tag nrho cov cuab yeej yog calibrated peb lub hlis twg. Cov ntaub ntawv ntau lawm yog traceable los ntawm ntau tus lej.

Tshawb xyuas Hnub no Cov Tshuag & Lub Sijhawm Lead