1. Qhov twg yog qhov corrosiveness ntawm cov tub rog ib puag ncig mus rau galvanized txheej txheej txheem manifest nws tus kheej?
High salinity: siab concentration ntawm chloride ions hauv seawater muaj zog tob, rhuav cov neeg ua yeeb yaj kiab ntawm zinc thiab accelating electrochemical corrosion.
Hloov chaw ntub thiab qhuav: thaj chaw txaws (siab dua qhov nruab nrab ntawm huab cua theem siab + cheeb tsam sib xyaw. Hauv kev rov qab ntub-kom qhuav lub voj voog, cov ntsev saum npoo ntawm Galvanized cov txheej txheem, thiab kev siv tus nqi ntau dua li thaj chaw puv nkaus.
Lub neej ntawm Galvanized txheej nyob rau thaj chaw no tej zaum yuav tsawg dua 10 xyoo, uas tsis tuaj yeem ua tiav lub neej kev tsim nyog ntawm ntau tshaj li 25 xyoo rau cov khoom siv cua fais fab Pile Foundation.
Cov ntsiab lus Oxygen Cov Ntsiab Lus: Siab yaj oxygen acceler toodates ua kom nrawm thiab txhawb nqa kev noj ntawm zinc fij rau ntawm zuaj.
Microbial corrosion: Marine Organism Organism Txuas thiab Microbial metabolites accelere hauv zos corrosion.
2.Qhov dab tsi yog qhov tsis pom zoo ntawm galvanized txheej hauv kev ua tub rog marine?
Qhov kev fij tseg ntawm cov tshuaj tua fij tau ntau dhau lawm: tus qauv ntawm zinc yog qhov tsis zoo ntau dua li cov hlau, thiab nws tseem yuav yaj tawm hauv electrolyte los tiv thaiv cov hlau matrix.
Hauv kev coj ua tau zoo ntawm dej hiav txwv, kev siv tus nqi ntawm zinc muaj peev xwm ntau dua 10 zaug ntawm thaj av ib puag ncig. Txawm tias tuab tuab (ntau dua los yog sib npaug rau 150μm) yog qhov nyuaj txhawb nqa tau ntev.
Pitting thiab tsis sib xws: quav tsis xws luag (pores, khawb hauv cov keeb kwm ntawm pitting, thiab perforation hauv zos ua rau cov hlau matrix kom raug.
Qhov kev sib hloov qhuav thiab ntub cov xwm txheej hauv lub txaws thaj chaw yog nquag los ua ib qho "loj Cathode (Zinc Formed)" Galvanic.
Kev pheej hmoo ntawm cov coating shedding: lub zinc-hlau txheej yog qhov loj heev thiab tej zaum yuav tawg thiab tev tawm ntawm kev ntxhov siab, deformation lossis cuam tshuam ntawm cov pawg foundation.
3.Qhov yog tus qauv loj thiab cov txheej txheem txwv?
Qhov teeb meem ntawm Galvanizing Super-loj Cheebtsam: Lub cheeb tsam ntawm cua lub zog pawg yog feem ntau tshaj li 6 meters, thiab qhov hnyav yog txhiab tus tons. Muaj tsawg kawg nkaus ob peb galvanizing nroj tsuag hauv lub ntiaj teb uas tuaj yeem ua xws li cov khoom siv loj, thiab qhov loj me ntawm kub-dip galvaning tank tsis tau raws li cov cai.
Vuam puas cov txheej: nyob rau hauv seem vuam (xws li ntu grouting sib txuas thiab cov khoom siv galdized ib ncig ntawm weld, sib sau ib qho tsis muaj zog rau corrosion.
Nws yog qhov nyuaj rau kev kho kom zoo ntawm kev kho vajtse weld thiab tshuaj tiv thaiv kev tiv thaiv hauv qhov chaw ntawm ntug.
Lifting thiab tsheb thauj khoom puas tsuaj: thaum hoisting loj pawg ntawm cov hlua galvanized, thiab kev sib tsoo ntawm cov txheej txheem ntawm cov hlau nplaum ntxiv ntxiv kom muaj kev pheej hmoo ntawm kev puas tsuaj.
4.Qhov dab tsi muaj kev pheej hmoo cuam tshuam nrog kev tiv thaiv kev tiv thaiv?
Kev tiv thaiv dhau ntawm kev tiv thaiv kev pheej hmoo: thaj chaw hauv qab ntawm cov pawg pom zoo feem ntau lees txais kev tiv thaiv kev tiv thaiv ntawm kev tiv thaiv Cathodic ".
Yog hais tias lub galvanized txheej coexists nrog kev txi aluminium-raws li kev txi anode, lub peev xwm ntawm zinc yog nruab nrab ntawm cov hlau thiab txhuas, uas yuav ua rau:
Lub galvanized lev ua tau cathode thiab poob rau kev ua haujlwm ntawm kev coj ua;
Cov txhuas anode siv cov txheej txheem tsis zoo rau lub galvanized txheej, ua rau cov tshuaj tiv thaiv hydrogen evololution and tev ntawm galvanized txheej.
5.Qhov twg yog lub neej ncig thiab saib xyuas kev ua haujlwm?
Tus nqi high pib: galvanizing ua tus nqi ua rau cov khoom loj heev, thiab kev thauj mus los tsawg.
Kev tsim kho kom haum rau kev kho kho: Chav dej tsis tau tom qab corrosion tsis ua hauj lwm hauv thaj chaw txaws, tab sis lub zog yoj nyob rau thaj chaw no yog qhov chaw ua haujlwm loj thiab lub qhov dej dhia ua haujlwm luv luv. Kev kho ib txwm ua (txias galvanizing pleev xim + topcoat) muaj kev tsis txaus siab nyob hauv ib puag ncig marine thiab yuav tsum tau saib xyuas.