Raws li kev tshawb nrhiav thiab kev txheeb xyuas, kev xeb yog ib qho tseem ceeb ua rau kev puas tsuaj rau npauj npaim li qub. Vim hais tias lub puab kab noj hniav nyob rau hauv kev sib cuag nrog nruab nrab, nws yog heev corroded. Tom qab corrosion, lub valve txoj kab uas hla yuav me me thiab cov ndlwg kuj nce, uas cuam tshuam rau kev sib kis ntawm nruab nrab. Qhov saum npoo ntawm lub cev valve feem ntau yog ntsia rau hauv av lossis hauv av. Qhov saum npoo yog nyob rau hauv kev sib cuag nrog cov huab cua thiab huab cua yog moist, yog li nws yog feem ntau xeb. Lub rooj zaum valve tau them tag nrho qhov twg cov kab noj hniav sab hauv yog nyob rau hauv kev sib cuag nrog nruab nrab. Yog li ntawd, kev kho deg txheej ntawm lub valve lub cev thiab lub phaj valve yog qhov zoo tshaj plaws tiv thaiv kev tiv thaiv corrosion nyob rau hauv ib puag ncig sab nraud.
1. Lub luag hauj lwm ntawm npauj npaim valve nto txheej
01. Valve lub cev khoom txheeb xyuas
Cov xim txheej txheej yog siv rau qhov chaw tsis siv neeg ntawm lub cev lub cev thiab lub kaus mom. Los ntawm cov xim no, peb tuaj yeem txiav txim siab cov khoom ntawm lub cev valve thiab nkag siab zoo dua nws cov yam ntxwv.
| Valve Lub cev khoom | Xim Xim | Valve Lub cev khoom | Xim Xim |
| Cast Iron | Dub | Hlau Hlau | Xiav |
| Forged hlau | Dub | WCB | Grey |
02. Tiv thaiv cov nyhuv
Tom qab lub valve lub cev nto yog coated nrog cov xim, lub valve lub cev nto yog cais los ntawm ib puag ncig. Cov nyhuv tiv thaiv no tuaj yeem hu ua cov nyhuv thaiv. Txawm li cas los xij, nws yuav tsum tau taw qhia tias cov txheej nyias nyias ntawm cov xim tsis tuaj yeem muab kev tiv thaiv zoo. Vim tias cov polymers muaj qee qhov kev ua pa, thaum cov txheej txheej nyias nyias, cov txheej txheem pores tso cai rau dej thiab oxygen molecules dhau mus dawb. Mos-sealing li qub muaj cov kev cai nruj ntawm cov tuab ntawm epoxy resin txheej ntawm qhov chaw. Txhawm rau txhim kho lub impermeability ntawm txheej, cov txheej txheem tiv thaiv corrosion yuav tsum siv cov yeeb yaj kiab tsim cov tshuaj uas tsis muaj huab cua permeability thiab cov khoom ntim khoom nrog cov khoom tiv thaiv siab. Nyob rau tib lub sijhawm, tus naj npawb ntawm cov txheej txheej txheej yuav tsum tau nce ntxiv kom cov txheej txheem nce mus txog qee qhov tuab thiab tuab thiab tsis ntxeem tau.
03.Corrosion inhibition
Cov khoom siv sab hauv ntawm cov xim teb nrog cov hlau kom passivate cov hlau nto los yog tsim cov tshuaj tiv thaiv los txhim kho cov nyhuv tiv thaiv ntawm txheej. Rau li qub nrog cov kev cai tshwj xeeb, koj yuav tsum tau them sai sai rau cov xim muaj pes tsawg leeg kom tsis txhob muaj kev phom sij loj. Tsis tas li ntawd, cam khwb cia steel li qub siv nyob rau hauv cov roj kav dej kuj tuaj yeem ua cov organic corrosion inhibitors vim cov khoom degradation tsim nyob rau hauv qhov kev txiav txim ntawm qee cov roj thiab kev ua kom qhuav ntawm cov xab npum hlau.
04. Kev tiv thaiv hluav taws xob
Thaum lub dielectric penetrating txheej los rau hauv kev sib cuag nrog cov hlau nto, electrochemical corrosion nyob rau hauv zaj duab xis yuav tsim. Cov hlau uas muaj kev ua haujlwm siab dua hlau yog siv los ua cov khoom siv hauv cov txheej, xws li zinc. Nws yuav ua lub luag haujlwm tiv thaiv raws li kev txi anode, thiab cov khoom siv corrosion ntawm zinc yog ntsev-raws li zinc chloride thiab zinc carbonate, uas yuav ua rau cov khoob khoob hauv cov yeeb yaj kiab thiab ua rau cov yeeb yaj kiab nruj, zoo heev txo corrosion thiab ncua kev pab cuam lub neej. lub valve.
2. Cov txheej txheem feem ntau siv rau ntawm cov hlau li qub
Txoj kev kho saum npoo ntawm li qub feem ntau suav nrog xim txheej, galvanizing thiab hmoov txheej. Lub sijhawm tiv thaiv ntawm cov xim yog luv luv thiab tsis tuaj yeem siv nyob rau hauv kev ua haujlwm ntev. Cov txheej txheem galvanizing feem ntau yog siv hauv cov kav dej. Ob qho tib si kub-dip galvanizing thiab electro-galvanizing yog siv. Cov txheej txheem yog complex. Pretreatment siv cov txheej txheem pickling thiab phosphating. Yuav muaj cov kua qaub thiab alkali residues nyob rau saum npoo ntawm lub workpiece, tawm hauv corrosion Hidden txaus ntshai ua rau lub galvanized txheej yooj yim poob tawm. Lub corrosion kuj ntawm galvanized steel yog 3 mus rau 5 xyoo. Cov hmoov txheej siv nyob rau hauv peb Zhongfa li qub muaj cov yam ntxwv ntawm tuab txheej, corrosion kuj, yaig tsis kam, thiab lwm yam, uas muaj peev xwm ua tau raws li qhov yuav tsum tau ntawm li qub nyob rau hauv kev siv ntawm cov dej system.
01. Valve lub cev epoxy cob txheej
Nws muaj cov yam ntxwv hauv qab no:
· Corrosion kuj: Epoxy resin-coated steel tuav tau zoo corrosion kuj, thiab lub zog sib txuas nrog pob zeb yog txo qis. Lawv tsim nyog rau kev lag luam hauv thaj chaw ntub dej lossis corrosive media.
· Muaj zog adhesion: Lub hav zoov ntawm polar hydroxyl pawg thiab ether bonds muaj nyob rau hauv epoxy resin molecular saw ua rau nws adhesion heev rau ntau yam khoom. Lub shrinkage ntawm epoxy resin thaum kho yog tsawg, qhov kev ntxhov siab sab hauv tsim yog me me, thiab kev tiv thaiv txheej txheej tsis yooj yim rau poob thiab poob.
· Cov khoom hluav taws xob: Cov txheej txheem kho epoxy resin yog cov khoom siv hluav taws xob zoo heev nrog cov khoom siv hluav taws xob siab, qhov dej tsis kam, thiab arc tsis kam.
· Pwm Resistant: Lub kho epoxy resin system yog resistant rau feem ntau pwm thiab yuav siv tau nyob rau hauv hnyav tropical tej yam kev mob.
02. Valve phaj nylon phaj khoom
Cov ntaub ntawv nylon yog cov tsis tshua muaj corrosion-resistant thiab tau ntse siv nyob rau hauv ntau daim ntaub ntawv xws li dej, av nkos, zaub mov thiab seawater desalination.
· Sab nraum zoov kev ua tau zoo: Cov nylon phaj txheej tuaj yeem dhau qhov ntsuas tshuaj ntsev. Nws tsis tau tev tawm tom qab muab tso rau hauv dej hiav txwv rau ntau tshaj 25 xyoo, yog li tsis muaj corrosion rau hlau qhov chaw.
· Hnav tsis kam: hnav tsis kam zoo heev.
· Impact resistance: Tsis muaj cov tsos mob ntawm tev tawm nyob rau hauv muaj zog.
3. txheej txheem tshuaj tsuag
Cov txheej txheem txau yog workpiece pretreatment → plua plav tshem tawm → preheating → txau (primer - trimming - topcoat) → solidification → txias.
Txau Txau yog siv cov tshuaj tsuag electrostatic. Raws li qhov loj ntawm lub workpiece, electrostatic txau tuaj yeem muab faib ua cov hmoov electrostatic txau cov kab ntau lawm thiab hmoov electrostatic spraying unit. Cov txheej txheem ob yog tib yam, thiab qhov sib txawv tseem ceeb yog txoj kev hloov pauv ntawm lub workpiece. Cov kab ntau lawm siv cov saw txuas rau kev sib kis tsis siv neeg, thaum lub tshuab tshuaj tsuag yog manually hoisted. Lub thickness ntawm txheej yog tswj ntawm 250-300. Yog tias qhov tuab tsawg dua 150 μm, kev tiv thaiv kev ua haujlwm yuav raug txo. Yog tias lub thickness ntau dua 500 μm, txheej txheej adhesion yuav txo qis, qhov cuam tshuam tsis kam yuav txo, thiab cov hmoov noj yuav nce ntxiv.