1.Vim li cas galvanizing nyuaj nyob rau hauv seawater ib puag ncig?
Corrosion ceev heev:
Nyob rau hauv ib txwm atmospheric tej yam kev mob, zinc txheej muaj peev xwm muab kev tiv thaiv ntau xyoo. Txawm li cas los xij, hauv dej hiav txwv, qhov corrosion ntawm zinc yog nrawm heev, uas tuaj yeem txo qhov kev tiv thaiv lub neej mus rau ob peb xyoos lossis tsawg dua.
Chloride ions rhuav tshem cov yeeb yaj kiab tiv thaiv ruaj khov (piv txwv li zinc carbonate) tsim rau ntawm zinc nto, ua rau tsis tu ncua thiab ceev corrosion.
Bimetallic Corrosion:
Yog tias galvanized steel txuas ncaj qha rau lwm cov hlau (xws li stainless hlau lossis tooj liab) hauv dej hiav txwv, cov ntaub ntawv galvanic cell. Vim nws cov khoom siv tshuaj ntau dua, zinc ua raws li anode, ua kom muaj zog corrosion thiab tiv thaiv lwm yam hlau.
Kev Tiv Thaiv Kev Tiv Thaiv Tsis Muaj Tsawg thiab Tsis Muaj Peev Xwm:
Thaum cov zinc txheej yog kiag li corroded, lub hauv paus steel substrate yuav sai sai xeb, ua rau cov yam ntxwv puas.
Cov dej hiav txwv kub, cov ntsiab lus oxygen, qib sib kis, thiab cov dej tshaj tawm tag nrho cuam tshuam rau tus nqi corrosion, ua rau kev kwv yees tseeb ntawm corrosion lifespan nyuaj.
2.Dab tsi yog daim ntawv thov scenarios ntawm galvanized coils hauv marine aquaculture?
Khoom siv superstructures lossis chaw qhuav:
Piv txwv li, saum toj no - dej txhawb nqa, txoj kev taug kev, tes tuav, lub thawv cuab yeej, thiab lwm yam. Cov cheeb tsam no tsis raug dej hiav txwv rau lub sijhawm ntev thiab feem ntau raug rau ntsev tsuag corrosion, ua rau lub neej ntev dua li cov dej hauv qab.
Luv - lub sij hawm los yog cov khoom hloov pauv tau:
Rau cov chaw ua haujlwm ib ntus uas muaj kev pabcuam luv luv lossis tsis yog -cov khoom tseem ceeb uas tau kuaj xyuas thiab hloov tau yooj yim, galvanizing yuav raug siv vim yog vim li cas.
Galvanized qhov chaw nrog kev kho deg ntxiv:
Yog tias galvanizing ua raws li qhov hnyav -lub luag haujlwm tiv thaiv- txheej txheej corrosion (xws li, epoxy zinc-nplua nuj primer + epoxy midcoat + polyurethane topcoat), tsim kom muaj kev tiv thaiv kev sib xyaw, kev pabcuam lub neej hauv marine ib puag ncig tuaj yeem txuas ntxiv. Txawm li cas los xij, qhov no nce nqi thiab txheej txheem complexity.
3.Dab tsi cov ntaub ntawv yog tsim nyog rau marine aquaculture khoom?
Marine-qib aluminium alloys (xws li 5-series thiab 6-series):
Qhov zoo: Lub teeb yuag, zoo heev seawater corrosion kuj, siab zog, thiab tsis - polluting.
Daim ntaub ntawv: Hulls, tawb thav duab, superstructures, thiab lwm yam. Nws yog tam sim no ib qho ntawm cov khoom tseem ceeb rau marine aquaculture.
Marine - qib stainless hlau (xws li 316 / L, 2205 duplex stainless hlau):
Qhov zoo: siab zog thiab zoo heev corrosion kuj (tshwj xeeb tshaj yog 316L muaj molybdenum, uas muaj zog pitting kuj).
Disadvantages: Tus nqi siab, thiab muaj peev xwm rau crevice corrosion thiab pitting corrosion nyob rau hauv anoxic ib puag ncig.
Daim ntaub ntawv: Cov khoom sib txuas uas xav tau lub zog siab, lub twj tso kua mis, thiab qee yam tseem ceeb hauv lub tawb.
Cov ntaub ntawv sib xyaw (xws li fiberglass reinforced yas / FRP):
Qhov zoo: Tsis muaj xeb- pov thawj, lub teeb yuag, yooj yim rau kev tsim, thiab kev saib xyuas qis.
Daim ntawv thov: Buoys, pipelines, thiab me me workboat hulls.
4.Qhov kev ceev faj yog dab tsi?
Txheeb xyuas qhov kev npaj siv: Tsis txhob siv rau ntawm qhov tseem ceeb ntawm kev thauj khoom-cov kabmob uas muaj kev cuam tshuam ntev rau hauv dej hiav txwv lossis hauv thaj chaw uas muaj kev hloov chaw ntub dej thiab qhuav ntuav.
Xaiv cov txheej tuab: Yog tias siv tsis tau, xaiv kub -dip galvanized coil nrog cov txheej tuab (xws li, ib qho uas ua tau raws li ASTM A123 tus qauv) txhawm rau tiv thaiv nws.
Muab kev tiv thaiv theem nrab: Siv cov xim ntxiv rau ntawm qhov chaw galvanized yog ib txoj hauv kev zoo los txuas ntxiv nws txoj sia. Xyuas kom zoo adhesion ntawm txheej rau lub galvanized nto (ib tug tshwj xeeb primer yuav tsum tau).
Tsis txhob sib cuag nrog hlau: Thaum lub sij hawm tsim, xyuas kom meej tias galvanized steel tsis ua rau hluav taws xob sib cuag nrog lwm yam hlau (xws li, stainless hlau los yog tooj liab). Yog tias qhov kev sib cuag no tsim nyog, siv insulating spacers.
Tsim kom hloov tau yooj yim: Tsim cov khoom siv galvanized kom yooj yim tshuaj xyuas, tu, thiab hloov.
5. Feem ntau, galvanized coils tuaj yeem siv rau hauv cov khoom siv dej hiav txwv marine?
Galvanized coils tuaj yeem siv rau hauv thaj chaw ntawm cov khoom siv dej hiav txwv marine uas qhov kev pheej hmoo ntawm corrosion qis dua (xws li cov chaw qhuav saum dej) los yog luv luv -lub sij hawm, tsawg- cov nqi daws. Txawm li cas los xij, rau cov khoom siv tseem ceeb uas siv tau ntev thiab raug rau cov cheeb tsam uas muaj corrosive heev (tshwj xeeb yog thaj chaw hauv qab dej), kev nqis peev hauv aluminium alloys, marine- qib stainless hlau, los yog cov ntaub ntawv sib xyaw yuav yog qhov kev xaiv pheej yig dua thiab muaj kev nyab xeeb dua, vim tias lawv muab kev pabcuam ntev dua thiab qis dua - cov nqi tu lub sijhawm.