Yuav ua li cas tiv thaiv corrosion rau steel qauv? Kev sib piv ntawm peb txoj hauv kev.

Hauv kev lag luam xws li kev tsim kho, txuas hniav, thiab cov cuab yeej siv hauv kev lag luam, cov qauv hlau tau siv dav vim lawv lub zog siab thiab yooj yim ntawm kev tsim kho. Txawm li cas los xij, cov hlau tsis zoo rau corrosion los ntawm ya raws, oxygen, thiab acidic thiab alkaline tshuaj nyob rau hauv ib puag ncig, ua rau xeb. Qhov no tsis yog tsuas yog txo cov txheej txheem load-cov kabmob muaj peev xwm thiab ua rau nws lub neej ua haujlwm luv, tab sis tuaj yeem ua rau muaj kev nyab xeeb. Yog li ntawd, kev tiv thaiv zoo - kev kho corrosion yog qhov tseem ceeb rau kev ua kom lub sijhawm ntev - kev ua haujlwm ruaj khov ntawm cov qauv steel. Tam sim no, xim txheej, kub-dip galvanizing, thiab hlau txau yog peb feem ntau siv los tiv thaiv-corrosion daws rau steel qauv. Txhua tus muaj nws tus yam ntxwv thiab cov xwm txheej siv tau, uas yuav raug txheeb xyuas kom meej hauv qab no.

 

Xim Txheej: Siv dav siv yooj yim los tiv thaiv-Cov tshuaj tiv thaiv corrosion

• Kev tiv thaiv-Txoj cai ntawm kev xeb

Cov xim pleev xim muaj feem xyuam nrog kev siv ntau txheej ntawm cov tshuaj tiv thaiv- cov xim pleev xim rau saum npoo ntawm cov qauv hlau, tsim cov yeeb yaj kiab tiv thaiv txuas ntxiv uas cais cov hlau los ntawm cov xov xwm corrosive hauv ib puag ncig, yog li ua tiav lub hom phiaj ntawm kev tiv thaiv corrosion. Anti- cov xim pleev xim yog tsim los ntawm cov yeeb yaj kiab- tsim cov tshuaj, cov xim, cov kuab tshuaj, thiab cov tshuaj ntxiv. Cov yeeb yaj kiab- cov khoom tsim ua cov xim tawv tawv tom qab ziab, muab kev tiv thaiv; pigments txhim khu kev hnav tsis kam, huab cua tsis kam, thiab opacity ntawm cov xim zaj duab xis; cov kuab tshuaj pab cov xim pleev xim rau qhov sib npaug; thiab additives txhim kho daim ntawv thov kev ua tau zoo thiab tiv thaiv - cov nyhuv corrosion ntawm cov xim.

• Kev tsim kho

Surface Pre-kev kho mob: Qhov no yog ib kauj ruam tseem ceeb ntawm cov xim txheej, cuam tshuam ncaj qha rau adhesion ntawm txheej. Cov txheej txheem xws li sandblasting thiab txhaj tshuaj blasting feem ntau yog siv los tshem tawm xeb, zeb nplai, roj stains, thiab lwm yam impurities los ntawm cov hlau nto, ua tiav qee qhov kev ntxhib los mos (feem ntau yuav tsum tau roughness ntawm 40-75 μm) kom muaj qhov sib cuag ntawm cov txheej thiab cov hlau.

Primer Txheej: Cov primer yog nyob rau hauv kev sib cuag ncaj qha nrog cov hlau thiab nws lub luag haujlwm tseem ceeb yog tiv thaiv xeb thiab txhim kho adhesion. Cov primer tsim nyog raug xaiv raws li cov hlau qhov chaw pabcuam thiab tiv thaiv- cov kev xav tau corrosion, xws li epoxy zinc-nplua nuj primer lossis inorganic zinc- nplua nuj primer. Cov primer yog siv sib npaug ntawm kev siv tshuaj tsuag, txhuam, lossis cov txheej txheem txheej txheej, feem ntau hauv 1-2 lub tsho tiv no, nrog rau cov yeeb yaj kiab qhuav tuab ntawm 50-80 μm.

Intermediate Coat Application: Lub tsho loj nruab nrab plays lub luag haujlwm sib txuas, ua kom cov txheej txheej tuab thiab txhim kho kev tiv thaiv - corrosion thiab mechanical zog. Feem ntau siv cov txheej txheem nruab nrab xws li epoxy micaceous hlau oxide nruab nrab cov xim, siv rau hauv 1-2 lub tsho, nrog rau cov yeeb yaj kiab qhuav tuab ntawm 80-150 μm.

Daim ntawv thov Topcoat: Lub topcoat tsuas yog muab kho kom zoo nkauj thiab tiv thaiv, tiv thaiv yaig los ntawm ultraviolet rays, dej nag, thiab tshuaj lom neeg. Qhov tsim nyog topcoat yog xaiv raws li qhov chaw pabcuam, xws li acrylic topcoat lossis polyurethane topcoat, siv rau hauv 1-2 lub tsho, nrog rau cov yeeb yaj kiab qhuav tuab ntawm 60-100 μm.

• Qhov zoo thiab siv tau Scenarios

Qhov zoo: Kev tsim kho yooj yim thiab yooj yim, tuaj yeem nqa tawm ntawm -site; muaj ntau yam txheej txheej, tso cai rau kev xaiv cov txheej txheem tsim nyog raws li qhov chaw sib txawv thiab cov kev xav tau; tus nqi qis, haum rau me me thiab nruab nrab - steel qauv tej yaam num.

Cov xwm txheej siv tau: Sab hauv steel qauv, ib puag ncig uas tsis muaj zog corrosiveness, xws li cov nroj tsuag kev lag luam zoo tib yam thiab cov qauv hlau sab hauv ntawm cov tsev lag luam; qhov chaw uas muaj kev xav tau siab rau kev zoo nkauj zoo nkauj.

 

Kub-Dip Galvanizing: Kev daws teeb meem Classic rau Ntev-Tsev Tiv Thaiv Kev Tiv Thaiv

• Txoj Cai Tiv Thaiv Corrosion

Kub-dip galvanizing yuav immersing lub derusted steel qauv nyob rau hauv molten zinc, ua ib tug ntom zinc- hlau alloy txheej thiab ib tug ntshiab zinc txheej ntawm steel nto. Zinc txheej reacts nrog oxygen nyob rau hauv cov huab cua los tsim ib tug zinc oxide zaj duab xis, tiv thaiv ntxiv oxidation ntawm zinc txheej. Nyob rau tib lub sijhawm, zinc yog reactive dua hlau; Thaum cov zinc txheej puas lawm, zinc yuav corrode ua ntej, tiv thaiv cov hlau los ntawm corrosion, yog li ua tiav ntev - tiv thaiv corrosion.

• Kev tsim kho

Ua ntej-kev kho mob: suav nrog degreasing, pickling, thiab yaug. Degreasing tshem cov roj thiab roj los ntawm cov hlau nto; pickling siv hydrochloric acid los yog sulfuric acid tov kom tshem tawm xeb thiab nplai los ntawm cov hlau nto; rinsing cleans residual acid tov los tiv thaiv nws los ntawm kev nqa mus rau cov txheej txheem tom ntej.

Kub-dip galvanizing: Lub pre- kho steel qauv yog immersed nyob rau hauv molten zinc ntawm qhov kub ntawm kwv yees li 450-480℃rau ib lub sij hawm (nyob ntawm seb cov hlau thickness, feem ntau yog ob peb feeb mus rau kaum feeb), tso cai rau cov zinc molten kom tag nrho cov hlau los tsim ib tug zinc-hlau alloy txheej txheej.

Tom qab-kev kho mob: suav nrog dej txias, passivation, thiab ua tiav. Dej txias kom txias sai sai rau cov hlau, tiv thaiv oxidation ntawm zinc txheej; passivation ua ib zaj duab xis tiv thaiv rau saum npoo ntawm zinc txheej, txhim kho corrosion kuj; thiab ua tiav tshem tawm zinc nodules thiab slag los ntawm steel nto, ua rau saum npoo du thiab aesthetically pleasing.

• Qhov zoo, qhov tsis zoo, thiab siv tau Scenarios

Qhov zoo: Kev tiv thaiv zoo heev - kev ua haujlwm corrosion; zinc txheej tuaj yeem kav ntev li 20-30 xyoo lossis ntev dua nyob rau hauv ib puag ncig huab cua; zinc txheej yog ruaj khov rau cov hlau, muaj zog hnav tsis kam thiab cuam tshuam tsis kam; tsis tas yuav tsum muaj kev saib xyuas tas li, txo cov nqi khiav haujlwm ntev.

Cov xwm txheej uas siv tau: Cov qauv hlau raug nthuav tawm sab nraud rau lub sijhawm ntev, xws li txuas hniav, cov kav xa hluav taws xob, thiab kev loj guardrails; loj - nplai steel qauv tej yaam num nrog siab tiv thaiv - corrosion yuav tsum tau thiab kev kho nyuaj.

 

Hlau Txau: Ib qho kev daws teeb meem rau siab -Kev Ua Haujlwm Los Tiv Thaiv- Corrosion

• Kev tiv thaiv-Txoj cai ntawm kev xeb

Cov tshuaj tsuag hlau siv cov cua sov (xws li hluav taws xob arc, nplaim taws, lossis ntshav) los ua kom sov cov hlau xaim lossis hmoov rau lub molten lossis semi-molten lub xeev, thiab tom qab ntawd atomizes thiab tshuaj tsuag rau hauv cov qauv hlau siv lub siab - cua nrawm los tsim cov hlau txheej. Feem ntau siv tshuaj tsuag hlau muaj xws li zinc, aluminium, thiab lawv cov alloys. Cov hlau no tsim cov yeeb yaj kiab oxide rau ntawm qhov chaw, muab kev tiv thaiv- tiv thaiv corrosion. Cov txheej kuj tseem muaj qee qhov porosity, uas tuaj yeem sau nrog cov tshuaj tiv thaiv -corrosion txheej ntxiv los txhim kho kev tiv thaiv- kev ua haujlwm corrosion.

• Kev tsim kho

Surface Pre-kev kho mob: Zoo ib yam li cov xim txheej, cov hlau saum npoo yuav tsum tau tshem tawm cov xeb nruj thiab kev kho roughening siv txoj kev xws li sandblasting. Qhov chaw huv huv yuav tsum ncav cuag Sa2.5 lossis siab dua, thiab qhov roughness yuav tsum yog 75-125 μm.

Hlau Txau: Xaiv cov txheej txheem tsim nyog raws li cov khoom siv tshuaj tsuag thiab cov khoom siv, xws li tam sim no thiab voltage rau arc txau, thiab cov pa roj thiab oxygen txaus rau cov nplaim hluav taws. Tom qab cua sov thiab atomizing cov khoom siv hlau, nws yog sib npaug zos rau ntawm cov hlau nto, tswj cov txheej thickness. Feem ntau, lub thickness ntawm zinc thiab txhuas txheej yog 0.2-0.5 hli.

Pore ​​Sealing Treatment: Txhawm rau txhim kho cov kev tiv thaiv kev tiv thaiv - kev ua haujlwm corrosion ntawm txheej, kev kho qhov pore sealing yog xav tau tom qab txau. Cov txheej pores tau ntim nrog cov pore tshwj xeeb- tus neeg sawv cev sealing (xws li epoxy resin, silicone resin, thiab lwm yam), feem ntau yog siv rau hauv 2-3 lub tsho, nrog rau cov yeeb yaj kiab qhuav tuab ntawm 0.1-0.3 hli.

• Qhov zoo thiab siv tau Scenarios

Qhov zoo: Zoo heev corrosion kuj, nrog rau kev pab cuam lub neej ntawm ntau tshaj 30 xyoo; siab sib txuas lub zog ntawm txheej thiab hlau, zoo hnav tsis kam thiab corrosion kuj; txheej tuab thiab cov ntaub ntawv tuaj yeem hloov kho raws li qhov yuav tsum tau ua, muab qhov muaj zog yoog raws; haum rau steel qauv nrog ntau yam complex duab.

Cov xwm txheej siv tau: Cov qauv hlau nyob rau hauv ib puag ncig corrosive heev, xws li marine engineering (offshore platforms, chaw nres nkoj), thiab steel qauv hauv cov nroj tsuag tshuaj; ib qho tseem ceeb steel qauv tej yaam num yuav tsum tau heev heev corrosion kuj thiab qhov uas tus nqi saib xyuas tau txais.

Thaum xaiv cov txheej txheem tiv thaiv corrosion rau cov qauv steel, yam xws li kev pabcuam ib puag ncig, qhov tseem ceeb, pob nyiaj siv, thiab kev saib xyuas ntawm cov qauv steel yuav tsum raug txiav txim siab:

Rau cov qauv hlau sab hauv tsev zoo tib yam lossis cov phiaj xwm nkag siab rau cov nqi, xim txheej yog qhov kev xaiv pheej yig thiab siv tau.

 

Rau cov qauv hlau loj nthuav tawm sab nraum zoov hauv ib puag ncig corrosive, kub -dip galvanizing yog tus nqi- siv tau zoo.

 

Thaum cov txheej txheem steel nyob rau hauv ib puag ncig corrosive heev (xws li marine lossis tshuaj lom neeg thaj chaw), thiab cov kev xav tau siab heev tau muab tso rau ntawm kev tiv thaiv corrosion lub neej thiab kev ua haujlwm, hlau txau yog qhov tsim nyog.

 

Kev tiv thaiv corrosion ntawm steel qauv yog qhov tseem ceeb rau kev ruaj ntseg thiab kev pab lub neej. Xaiv cov txheej txheem tiv thaiv corrosion tsim nyog yog qhov tseem ceeb. Los ntawm kev nkag siab txog cov yam ntxwv ntawm peb txoj hauv kev- xim txheej, kub- dip galvanizing, thiab tshuaj tsuag hlau-thiab xav txog qhov xav tau tiag tiag, kev tiv thaiv corrosion txhim khu kev qha tuaj yeem muab rau cov qauv steel, txo cov nqi tu thiab ncua lawv lub neej kev pab cuam.