Cov Hluav Taws Xob Txuas Nrig Nrig Ntaus Nrig

Lub hauv paus rau phau ntawv

Tsis ntev los no cov kev tshawb fawb metallurgicalDaim duab 19. Cov nqi corrosion rau Brass daim coupon raws li kev ua haujlwm ntawm ZN / CU pivmuab cov kev pom tseem ceeb rau cov engineers qhia meejBrass ValveCov ntaub ntawv. Cov ntaub ntawv tiv thaiv corrosion tsis kam cuam tshuam ncaj qha cuam tshuam valve xaiv nyob rau hauv cov kav dej, thiab muaj kev lag luam uas cov khoom poob.

Qhov kev ntsuas kev ntsuas no:
✔ Zinc / tooj liab piv rau ntawm tooj dag corrosion
✔ Cov khoom lag luam alloy zoo nkauj rauNrig dag li qub
✔ Cov kev cuam tshuam rau cov khoom lag luam valve
Kev sib piv nrog cov qauv kev lag luam (ASTM B16 / B124)

Daim duab txiav txim siab 19: Zn / Cu piv thiab corrosion tsis kam

1. Tus tooj dag corrosion spectrum

Txoj kev tshawb no tau xeem 12 Alloy Variations nrog Zinc Ntsiab Lus los ntawm 5% mus rau 45% hauv kev tswj ib puag ncig:

5-15% ZN (Bed tooj dag):0.0021 mm / yr corrosion

30-35% ZN (Daj Brass):0.0048 mm / yr corrosion

40-45% ZN (Muntz Hlau):0.0093 mm / yr corrosion

2. Lub corrosion "qab zib"

Daim duab 19 qhia txog30% Zn / 70% CuRaws li qhov kev ua tau zoo tshaj plaws:

Tswj kev ua haujlwm rau lub valve machining

Muaj 58% zoo corrosion tsis kam dua li high- dinc alloys

Ua Phem Seater Dej Kuj Yuav Tsum Tau (ASTM B111)

Vim li cas qhov teeb meem no rau tooj dag txoj kev ua haujlwm valass

1. Valve tsis ua hauj lwm mechanism txuas nrog zom cov ntsiab lus

2. Kev Lag Luam Txuj Ci Alloys piv

C36000 (pub dawb -} tej tooj):35% Zn - Ntau tab sis nquag mus rau Duzincification

C46400 (Naval tooj dag):39% ZN -}}} muab cov yas txhim kho hiav txwv tsis kam

C85700 (Leaded Brass):32% Zn -} Zoo tshaj plaws rau cov dej muaj txiaj ntsig

Cov Ntawv Thov Siv Rau Cov Kws Ua Haujlwm Valve

1. Cov Lus Qhia Xaiv Xaiv

Marine ib puag ncig:Qhia kom meej C46400 (1% Sn Additive)

High - kub chav dej:C23000 (15% ZN)

Haus Dej Tshuab:C85700 (Lead -}} Dawb variants)

2. Kev Txiav Txim Siab

Higher Zn (>35%) txo cov nqi machining tab sis nce corrosion

Kub -}} forged li qub ua tau zoo dua li pov rau cov alloys zoo tib yam

Electropolishing txhim kho saum npoo tiv thaiv los ntawm 40%

Kev Kawm Kev Kawm: Txoj Kev Hloov Hluav Taws Xob Hluav Taws Xob Cov Nqi Vs. Alloy Xaiv

Lub housston tshuaj cog sib piv pebBrass ValveAlloys tshaj 10 xyoo:

Nrhiav:Zoo ZN / Cu Piv (C23000) tau txais $ 241,000 txhua xyoo

Kev Tshawb Fawb Yav Tom Ntej

NanocotingsTxhawm rau txhim kho qis -} Zn Brass Kev Ua Haujlwm

Ntxiv Kev Lag Luamntawm gradient - muaj cov li qub

Ai - pab alloy tsimRau cov corrosion ib puag ncig

Tag

Daim duab 19 Cov Ntaub Ntawv Corrosion muab kev tshawb nrhiav hauv lub hauv paus scientific rauBrass ValveXaiv cov khoom siv. Thaum siab - dinc alloys muaj nqi txiaj ntsig, qhov 30 {}}}}}}}. Cov nqi sib npaug yuav tsum sib npaug cov nqi pib tawm tsam kev siv nyiaj, tshwj xeeb hauv kev xeb ib puag ncig. Cov kev tshawb pom no yuav tsum qhia ASTM thiab ASME cov qauv kev hloov kho rau cov khoom siv tooj dag.