Corrosion Protection Technology thiab Environmental Adaptation of Fishplates
Dab tsi yog cov kauj ruam tseem ceeb ntawm kub -dip galvanizing los tiv thaiv- txheej txheem corrosion rau ntses phaj?
Cov kauj ruam tseem ceeb ntawm kub-dip galvanizing los tiv thaiv- txheej txheem corrosion rau ntses phaj suav nrog peb theem: ua ntej- kho, kub-dip galvanizing thiab tom qab- kho. Ua ntej- kev kho mob yog qhov txuas tseem ceeb. Ua ntej, lub phaj ntses yuav tsum tau degreased kom tshem tawm cov roj stains thiab impurities ntawm qhov chaw, thiab tom qab ntawd pickling yog siv los tshem tawm cov nplai oxide thiab xeb kom ntseeg tau tias zinc txheej tuaj yeem ua kom nruj. Tom qab pickling, dej ntxuav thiab ziab yuav tsum tau kom tsis txhob residual acid corrosion ntawm substrate. Nyob rau hauv lub kub-dip galvanizing theem, cov ntses qhuav yog immersed nyob rau hauv molten zinc tov ntawm li 450℃rau 1-2 feeb, thiaj li hais tias ib tug uniform zinc- hlau alloy txheej thiab ntshiab zinc txheej yog tsim nyob rau saum npoo ntawm ntses phaj. Tom qab-kev kho mob suav nrog kev ua kom txias, ua kom muaj zog thiab tshuaj xyuas. Kev kho mob Passivation tuaj yeem tsim cov yeeb yaj kiab tiv thaiv rau saum npoo ntawm zinc txheej los txhim kho corrosion kuj ntawm zinc txheej. Thaum kawg, cov nyhuv anti-corrosion yog ua kom tau raws li tus qauv los ntawm cov tsos thiab thickness nrhiav tau.
Dab tsi yog qhov zoo ntawm cov txheej txheem sherardizing piv nrog kub -dip galvanizing?
Thawj qhov kom zoo dua ntawm cov txheej txheem sherardizing piv nrog kub -dip galvanizing yog tias cov txheej txheem sherardized yog ruaj khov ua ke nrog cov substrate. Thaum lub sij hawm sherardizing txheej txheem, zinc atoms yuav diffuse mus rau hauv cov hlau los tsim ib tug zinc - hlau alloy txheej, nrog ib tug sib txuas lub zog ntawm ntau tshaj 200MPa, thiab zinc txheej tsis yooj yim rau poob. Qhov thib ob kom zoo dua yog tias cov uniformity ntawm sherardized txheej yog zoo dua. Rau qhov nyuaj xws li threaded qhov thiab cov ces kaum ntawm fishplates, cov txheej txheem sherardizing tuaj yeem ua tiav tag nrho, thaum kub -dip galvanizing yog qhov tsis txaus zinc txheej tuab hauv cov khoom no. Qhov thib peb qhov zoo dua yog tias cov txheej sheerardized muaj zog corrosion kuj. Nyob rau hauv tib lub thickness, lub ntsev tsuag corrosion kuj lub sij hawm ntawm lub sherardized txheej yog 1.5-2 zaug ntawm kub-dip galvanized txheej. Tsis tas li ntawd, qhov kub ntawm cov txheej txheem sherardizing yog qis dua, uas tsis tshua muaj kev cuam tshuam rau cov cuab yeej cuab tam ntawm cov phaj ntses thiab yog qhov tsim nyog rau kev tiv thaiv kev tiv thaiv kev tiv thaiv kev tiv thaiv corrosion ntawm high-strength fishplates.
Dab tsi los tiv thaiv - cov txheej txheem corrosion yuav tsum raug xaiv rau cov ntses hauv cov ntug dej hiav txwv?
Cov ntug hiav txwv dej muaj huab cua siab thiab muaj ntsev ntau, uas yog nyob rau hauv ib puag ncig corrosive heev. Fishplates yuav tsum nyiam siv cov sherardizing + kaw txheej txheej los tiv thaiv - txheej txheem corrosion. Cov txheej txheem sherardized tuaj yeem muab ntev - lub sij hawm cathodic tiv thaiv los tiv thaiv ntsev yaig, thiab cov txheej kaw kaw tuaj yeem cais cov huab cua thiab noo noo los txhim kho kev tiv thaiv kev tiv thaiv - corrosion. Piv nrog rau cov txheej txheem kub kub ib zaug -dip galvanizing, cov ntsev tsuag tshuaj tiv thaiv corrosion lub sij hawm ntawm cov txheej txheem tiv thaiv kev sib xyaw ua ke tuaj yeem txuas ntxiv mus rau ntau tshaj 2000 teev, uas tuaj yeem ua tau raws li kev tiv thaiv{10}} corrosion xav tau ntawm cov ntug dej hiav txwv rau ntau tshaj 15 xyoo. Yog tias lub phaj siv rau hauv hnyav- cov kab tsheb thauj khoom, cov cuab yeej tiv thaiv cathodic tuaj yeem raug ntxiv los ntawm kev sib xyaw ua ke los tiv thaiv{14}} xeb los ua ntau yam - txheej tiv thaiv - corrosion barrier. Xaiv qhov tsim nyog los tiv thaiv- txheej txheem corrosion tuaj yeem txo qhov zaus hloov ntawm cov phaj ntses hauv cov ntug dej hiav txwv thiab txo cov nqi tu.
Dab tsi yog qhov yuav tsum tau ua rau kev tiv thaiv -corrosion txheej ntawm fishplates?
Ua ntej tshaj plaws, cov tshuaj tiv thaiv -corrosion txheej ntawm fishplates yuav tsum muaj adhesion zoo heev. Qib adhesion ntawm txheej txheej thiab substrate yuav tsum mus txog qib 1 kom ntseeg tau tias nws yuav tsis poob rau hauv qhov kev txiav txim ntawm lub tsheb ciav hlau vibration load. Qhov thib ob yog qhov yuav tsum tau muaj kev tiv thaiv corrosion. Cov txheej txheem yuav tsum dhau qhov kev ntsuas ntsev ntsev ntau tshaj 1000 teev. Tom qab kev sim, lub txheej yuav tsum tsis txhob muaj blistering, xeb thiab tawg phenomena. Qhov thib peb yog qhov yuav tsum tau hnav tsis kam. Cov cwj mem hardness ntawm cov txheej yuav tsum ncav cuag siab tshaj 2H kom tiv thaiv kev sib txhuam kev puas tsuaj thaum lub sij hawm installation thiab siv. Tsis tas li ntawd, cov txheej txheem yuav tsum muaj huab cua zoo, thiab yuav tsis muaj chalk lossis discolor nyob rau hauv ultraviolet hluav taws xob thiab kub hloov. Rau ib puag ncig sib txawv, cov txheej yuav tsum muaj cov khoom tshwj xeeb sib xws, xws li kev kub siab ua haujlwm nyob rau hauv siab - qhov kub thiab txias chemical corrosion kuj nyob rau hauv acid- puag ncig thaj chaw.
Yuav ua li cas kuaj cov tshuaj tiv thaiv- kev kho corrosion ntawm fishplates?
Thawj kauj ruam los sim cov tshuaj tiv thaiv -corrosion kev kho mob ntawm fishplates yog kev soj ntsuam zoo li qub, saib seb puas muaj cov tshuaj tiv thaiv -corrosion txheej ntawm cov nplais ntses yog ib yam thiab du, thiab seb puas muaj qhov tsis xws luag xws li plating ploj, tev thiab npuas. Qhov thib ob kauj ruam yog nrhiav kom tau thickness. Ib lub tshuab nqus hlau nplaum yog siv los ntsuas ntau lub ntsiab lus ntawm qhov sib txawv ntawm cov phaj ntses. Lub thickness ntawm cov kub-dip galvanized txheej yuav tsum siab tshaj los yog sib npaug rau 85μm, thiab lub thickness ntawm sherardized txheej yuav tsum siab tshaj los yog sib npaug zos rau 60μm kom ntseeg tau tias cov thickness raws li tus txheej txheem. Qhov thib peb kauj ruam yog adhesion detection. Tus ntoo khaub lig- txiav txiav yog siv rau kev sim. Tom qab scribing txheej txheej, nws yog pasted thiab torn nrog daim kab xev, thiab lub tev ntawm txheej yog soj ntsuam los txiav txim lub adhesion qib. Qhov thib plaub yog kev kuaj xyuas corrosion. Qhov chaw corrosion yog simulated los ntawm kev kuaj ntsev ntsev, thiab xeb ntawm cov ntses tom qab ib lub sij hawm ntawm lub sij hawm raug soj ntsuam los soj ntsuam cov nyhuv tiv thaiv ntawm cov txheej txheem tiv thaiv -corrosion. Tsuas yog dhau los ntawm ntau qhov kev ntsuam xyuas ntau yam tuaj yeem txiav txim siab seb qhov kev tiv thaiv kev tiv thaiv - kev kho corrosion ntawm phaj ntses ua tau raws li tus qauv.