Corrosion Protection Classification thiab Life Cycle Protection Technology rau Rail Cheebtsam
Dab tsi yog qhov ntsuas kev txiav txim siab tseem ceeb rau kev tiv thaiv- kev tiv thaiv kev tiv thaiv kev sib cais ntawm cov khoom siv taug qab?
Cov kev txiav txim siab tseem ceeb rau kev tiv thaiv kev tiv thaiv - kev tiv thaiv kev tiv thaiv kev tiv thaiv kev tiv thaiv kev sib cais ntawm cov khoom siv taug qab tau teeb tsa nyob ib puag ncig corrosion ntawm qhov chaw pabcuam, feem ntau suav nrog plaub qhov ntsuas:ib puag ncig txheeb ze humidity, ntsev tsuag cov ntsiab lus, sulfur dioxide concentration thiab kub variation ntau yam, thiab ib qho kev txiav txim siab yog ua nrog rau hom ib puag ncig. Tus txheeb ze cov av noo yog qhov qhia tau yooj yim: C1 me me corrosion ib puag ncig muaj cov txheeb ze cov av qis dua lossis sib npaug li 60%, feem ntau cov chaw nres tsheb hauv tsev thiab thaj chaw qhuav hauv av; C2 nruab nrab corrosion muaj cov av noo ntawm 60%-80%, cov kab qhib zoo tib yam thiab tsis yog{11}} thaj chaw ntug hiav txwv; C3 hnyav corrosion muaj cov av noo ntau dua los yog sib npaug li 80% thiab cov ntsev tsuag cov ntsiab lus ntawm 0.05-0.2mg/m³, nyob rau hauv 30km ntawm ntug dej hiav txwv thiab maj mam tshuaj- thaj chaw muaj kuab paug; C4 huab cua corrosion muaj cov av noo Ntau dua lossis sib npaug li 90%, cov ntsiab lus tshuaj ntsev ntau dua lossis sib npaug ntawm 0.2mg / m³ lossis sulfur dioxide concentration Ntau dua lossis sib npaug li 0.15mg / m³, hauv 10km ntawm ntug dej hiav txwv, hnyav tshuaj lom neeg{25}} paug, muaj av noo thiab los nag. Qhov kub hloov pauv ntau yam yog qhov ntsuas ntsuas. Hauv cov cheeb tsam uas qhov kev hloov pauv txhua xyoo yog siab dua lossis sib npaug li 40 degree, tus nqi corrosion yuav nce 15% -20%, thiab qib kev tiv thaiv yuav tsum tau nce kom tsim nyog raws li qhov kev faib tawm thawj zaug. Tsis tas li ntawd, cov yam ntxwv xws li muaj cov dej hauv pas dej thiab cov plua plav paug yuav cuam tshuam rau kev faib tawm, thiab cov khoom siv hauv qhov chaw hauv pas dej yuav tsum muaj kev tiv thaiv kev tiv thaiv ntxiv.
Dab tsi yog cov txheej txheem kev tiv thaiv tseem ceeb ntawm kev taug qab cov khoom siv hlau hauv qab qib tiv thaiv sib txawv -corrosion qib?
Cov txheej txheem kev tiv thaiv tseem ceeb ntawm cov khoom siv hlau hauv qab sib txawv los tiv thaiv- qib corrosion yog hloov kho gradiently los ntawm cov txheej txheem yooj yim rau kev tiv thaiv kev sib xyaw raws li kev tiv thaiv corrosion, kom ntseeg tau tias cov nyhuv tiv thaiv yog txuam nrog cov qib corrosion. Rau C1 qib corrosion me me, cov tub ntxhais siv tauelectro-galvanizing + passivation kev kho mobtxheej txheem, nrog rau electro-galvanizing txheej thickness ntawm 8-10μm. Passivation kev kho mob txhim kho cov adhesion ntawm zinc txheej, uas yog feem ntau siv rau bolts, siab daim hlau thiab lwm yam khoom nyob rau hauv lub tsev chaw nres tsheb yards kom tau raws li cov kev xav tau los tiv thaiv corrosion. Rau C2 nruab nrab corrosion qib, lubkub-dip galvanizingtxheej txheem yog saws, nrog zinc txheej thickness ntawm 60-80μm. Lub compactness thiab hnav tsis kam ntawm zinc txheej yog zoo dua li electro-galvanizing, muaj feem xyuam rau cov ntses daim hlau, rail spikes thiab lwm yam khoom nyob rau hauv zoo tib yam qhib kab, uas yuav tiv taus txhua hnub cua thiab los nag corrosion. Rau C3 hnyav corrosion qib, lubkub-dip galvanizing + kaw txheejCov txheej txheem sib xyaw tau txais yuav, thiab cov txheej txheem epoxy kaw yog txau los ntawm kub -dip galvanizing, nrog rau tag nrho cov txheej tiv thaiv tuab ntawm 100-}120μm, muaj feem xyuam rau cov pob qij txha thiab cov hlua khi hauv cov ntug dej hiav txwv ntsev tsuag, nrog rau ntsev tsuag thiab hnav tsis kam. Rau C4 siab corrosion qib, cov txheej txheem high-end composite ntawmDacromet txheej + fluorocarbon topcoatyog saws. Lub Dacromet txheej muaj cov tshuaj tsw qab ntsev ntau tshaj 1000h, thiab cov fluorocarbon topcoat muaj cov huab cua zoo heev, nrog rau tag nrho cov tuab ntawm 150-200μm, muaj feem xyuam rau tag nrho cov hlau Cheebtsam nyob rau hauv ntug dej hiav txwv hnyav ntsev tsuag thiab tshuaj lom thaj chaw, ua tiav ntev - lub sij hawm los tiv thaiv corrosion.
Txoj kev tiv thaiv -kev tiv thaiv corrosion ntawm cov ntsia hlau sib txawv li cas ntawm lwm cov khoom siv hlau, thiab cov kev tiv thaiv tseem ceeb yog dab tsi?
Qhov sib txawv tseem ceeb ntawm kev tiv thaiv kev tiv thaiv - kev tiv thaiv corrosion ntawm cov ntsia hlau thiab cov khoom siv hlau xws li cov ntsia hlau thiab cov phaj ntses yog los ntawm cov yam ntxwv ua haujlwm uas cov ntsia hlau yuav tsum tau dais rov qab log - tsheb ciav hlau dov thiab kev sib txhuam, thiab tsis tuaj yeem tiv thaiv los ntawm cov txheej tuab. Nws yog ib qho tsim nyog yuav tsum ua raws li lub hauv paus ntsiab lus ntawm"kev tiv thaiv lub teeb hauv qhov chaw hnav, tiv thaiv hnyav hauv qhov tsis yog- hnav". Kev tiv thaiv tseem ceeb yog plaub ntu: qhov tsis yog -qhov chaw ntawm lub taub hau tsheb ciav hlau, lub vev xaib tsheb ciav hlau, lub hauv paus tsheb ciav hlau thiab cov pob qij txha. Piv nrog rau lwm cov khoom, cov txheej tuab ntawm qhov hnav ntawm lub taub hau tsheb ciav hlau yuav poob sai sai vim yog lub log tsis tu ncua - kev tsheb ciav hlau kev sib txhuam, thiab yuav cuam tshuam rau kev sib tw ntawm lub log - kev sib cuag. Yog li ntawd, tsuas yog nyias los tiv thaiv - xeb roj yog siv los tiv thaiv lub teeb, tsom rau kev tiv thaiv xeb es tsis yog los tiv thaiv - corrosion; thaum lwm yam khoom siv tsis muaj qhov yuav tsum tau hnav, cov txheej tuab tuaj yeem siv los ua kom tiav ntev -lub sij hawm tiv thaiv- corrosion. Cov kev tiv thaiv tseem ceeb ntawm txoj kev tsheb ciav hlau yog thawj qhov tsis yog{11}} hnav thaj tsam ntawm lub taub hau tsheb ciav hlau, uas yog txau nrog cov tsheb ciav hlau tshwj xeeb los tiv thaiv - xeb xim nrog txheej txheej thickness ntawm 30-40μm los tiv thaiv corrosion los ntawm nag thiab dej; thib ob lub rail web thiab rail puag, uas yog kho nrog kub-dip galvanizing los yog epoxy txheej nrog ib tug tuab ntawm 80-100μm los tiv thaiv sab corrosion; thib peb lub tsheb ciav hlau cov pob qij txha, qhov chaw sib koom ua ke yog qhov yooj yim rau cov dej tsub zuj zuj thiab xeb, muaj cov tshuaj tiv thaiv{19}}corrosion sealant, thiab lub periphery ntawm lub qhov ntsia hlau yog ntug- kaw; Thaum kawg txoj kev tsheb ciav hlau xaus, kho nrog chamfering + anti-corrosion txheej los tiv thaiv kev nthuav dav ntawm qhov kawg corrosion. Tsis tas li ntawd, cov welded pob qij txha ntawm cov ntsia hlau yog cov ntsiab lus tsis muaj zog ntawm kev tiv thaiv corrosion, uas yuav tsum tau muaj kev tiv thaiv tshwj xeeb nrog cov vuam tshwj xeeb los tiv thaiv xeb.
Dab tsi yog cov kev cai tseem ceeb rau kev tiv thaiv kev tiv thaiv- kev tiv thaiv corrosion nyob rau hauv kev thauj mus los thiab chaw cia khoom ntawm cov khoom siv taug qab?
Kev tiv thaiv kev tiv thaiv - kev tiv thaiv corrosion ntawm cov khoom siv hauv kev thauj mus los thiab chaw cia khoom yog qhov tseem ceeb los tiv thaiv kev puas tsuaj thaum lub sijhawm thauj mus los thiab ya raws corrosion thaum khaws cia. Nws yog ib qho tsim nyog yuav tsum ua raws li peb qhov tseem ceeb ntawmanti-kev puas tsuaj, tiv thaiv- ya raws thiab tiv thaiv- tiv thaiv corrosionlos xyuas kom meej qhov kev ncaj ncees ntawm cov txheej txheem tiv thaiv thiab cov khoom ntawm lawv tus kheej. Hais txog kev tiv thaiv - kev puas tsuaj, cov khoom siv hlau yuav tsum tau muab tso rau hauv cov khaubncaws sab nraud povtseg nrog cov npuas dej thiab cov yas zaj duab xis qhwv thaum lub sijhawm thauj mus los kom tsis txhob muaj kev sib tsoo ua rau cov txheej tiv thaiv ntog. Cov kab tsheb ciav hlau yuav tsum tau thauj los ntawm cov tsheb thauj khoom tshwj xeeb, thiab tiv thaiv - lub kaus mom kev sib tsoo raug ntsia rau ntawm qhov kawg kom tiv thaiv kev deformation ntawm lub taub hau thiab lub hauv paus thiab txheej khawb. Cov khoom puas yuav tsum tau kov nyob rau lub sijhawm. Hais txog kev tiv thaiv - noo noo, cov khoom yuav tsum tau muab cia rau hauv qhov chaw qhuav thiab qhov cua nyob hauv tsev uas muaj qhov txheeb ze av noo tswj qis dua 60%. Rau kev qhib cia ib ntus, lawv yuav tsum tau npog tag nrho nrog cov ntaub los nag, nrog cov dej noo- cov ntaub ntawv pov thawj muab tso rau hauv qab thiab tsa siab dua los yog sib npaug li 30cm hauv av kom tiv thaiv corrosion los ntawm av noo rov qab. Kev tshuaj xyuas tsis tu ncua yog ua nyob rau tib lub sijhawm, thiab qhov cua thiab dehumidification yog nqa tawm nyob rau lub sijhawm yog tias pom muaj condensation. Hais txog kev tiv thaiv - tiv thaiv corrosion, cov khoom ntawm cov khoom sib txawv yog txwv tsis pub muab sib xyaw thiab khaws cia, xws li carbon steel bolts thiab stainless hlau siab daim hlau yuav tsum muab khaws cia nyias kom tsis txhob muaj hluav taws xob tiv thaiv corrosion; qhov sib cuag ntawm cov khoom thiab hauv av thiab cov kev txhawb nqa yuav tsum tau muab cais tawm nrog cov ntaub qhwv insulating los tiv thaiv kev sib cuag corrosion. Tsis tas li ntawd, cov khoom siv nrog lub sijhawm khaws cia ntau tshaj 6 lub hlis yuav tsum tau rov ua dua -txhaj tshuaj tiv thaiv - xeb roj kom ntseeg tau tias cov tshuaj tiv thaiv - cov nyhuv corrosion tsis txo qis.
Yuav ua li cas kom paub txog kev tswj hwm thiab kev tswj hwm ntawm tag nrho lub neej voj voog ntawm kev tiv thaiv- kev tiv thaiv corrosion ntawm cov khoom siv hauv kev ua haujlwm thiab kev saib xyuas theem?
Kev tswj hwm thiab tswj kev tiv thaiv kev tiv thaiv- kev tiv thaiv corrosion ntawm cov khoom siv hauv kev ua haujlwm thiab kev saib xyuas theem yog lub hauv paus ntsiab lus ntawmkev tshuaj xyuas tsis tu ncua, cais kev saib xyuas thiab kho raws sijhawm. Raws li kev txhim kho corrosion thiab kev pab cuam lub neej ntawm cov khoom siv, qhov sib txawv ntawm kev saib xyuas kev ntsuas yog tsim los kom paub txog tag nrho lub neej kev tswj hwm thiab kev tswj hwm los ntawm kev tso mus rau scrapping. Ua ntej, kev tshuaj xyuas tsis tu ncua: teeb lub voj voog tshuaj xyuas raws li qib tiv thaiv- qib corrosion, tshuaj xyuas qib C1/C2 txhua 1-2 xyoos, thiab qib C3/C4 txhua 6-12 lub hlis. Txais kev kuaj pom pom + txheej thickness ntsuas ntsuas, tsom rau kev kuaj xyuas cov teeb meem xws li txheej tiv thaiv ntog, corrosion thiab bulging, thiab sau cov corrosion thiab degree. Thib ob, cais kev saib xyuas: faib cov qib txij nkawm raws li kev soj ntsuam xyuas. Kev xeb me me (txheej txheej tiv thaiv ntog tawm ＜5%) yog kho nrog kov-cov xim tiv thaiv; nruab nrab corrosion (poob tawm 5%-20%) yog kho nrog kev sib tsoo thiab derusting + re- txau txheej; corrosion hnyav heev (poob tawm ＞ 20% lossis pitting) yog kho nrog cov khoom hloov pauv kom tsis txhob nthuav dav ntawm corrosion cuam tshuam rau lub zog ntawm cov qauv. Thaum kawg, kho raws sijhawm: tom qab pom muaj teeb meem corrosion hauv kev tshuaj xyuas, kev kho yuav tsum ua kom tiav hauv 7 hnub. Cov txheej txheem kho yog ua raws li cov txheej txheem kev tiv thaiv thawj, thiab cov txheej txheem tuab thiab cov khoom siv tsis yog qis dua tus qauv tsim qauv. Tom qab kho, cov ntaub ntawv raug tsim thiab muab tso rau hauv tag nrho cov ntaub ntawv lub neej ntawm cov khoom. Tsis tas li ntawd, rau cov khoom tseem ceeb ntawm cov khoom hnyav thiab cov kab ceev ceev, kev soj ntsuam hauv online yog siv los saib xyuas lub xeev corrosion hauv lub sijhawm tiag tiag, paub txog kev hloov kho los ntawm "kev saib xyuas tsis tu ncua" mus rau "kev saib xyuas kwv yees" kom ntseeg tau tias kev tiv thaiv corrosion ntawm cov khoom ib txwm ua tau raws li tus qauv.