Q1: Puas yog ua kom cov tuab ntawm cov txheej galvanized tiag tiag txhim kho corrosion tsis kam?
A1: Yog, nyob rau hauv ib tug tej yam ntau yam, ua rau lub thickness ntawm cov galvanized txheej yuav ho ncua lub corrosion tiv thaiv lifespan. Raws li ib tug sacrificial anode, lub thicker lub galvanized txheej, qhov ntau corrosion nws muaj peev xwm tiv taus, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam uas cov txheej puas, xws li txiav thiab khawb, muab kev tiv thaiv ntau ruaj. Rau cov cheeb tsam hauv av, nce los ntawm Z80 (80g / m²) mus rau Z120 tuaj yeem ua kom lub neej ntev dua 2-3 xyoos; nyob rau hauv ntug dej hiav txwv ib puag ncig, nce los ntawm Z180 mus rau Z275 tuaj yeem txuas ntxiv kev tiv thaiv lifespan los ntawm 5-8 xyoo. Txawm li cas los xij, nws tseem ceeb heev uas yuav tsum nco ntsoov tias qhov kev nce no tsis yog linear. Tshaj li qhov "tsim nyog sab sauv txwv" sib haum rau qee qhov chaw, qhov txiaj ntsig ntawm qhov nce thickness yuav txo qis heev.
Q2: Vim tias nws tuaj yeem txhim kho corrosion, vim li cas ho tsis thicker ib txwm zoo dua?
A2: Vim tias txheej txheej zinc plating ntau dhau ua rau peb qhov teeb meem tseem ceeb:
Tus nqi nce ntxiv: Zinc yog cov khoom siv hlau uas muaj nqi siab heev. Rau txhua 1g / m² nce hauv zinc txheej, tus nqi nce linearly. Piv txwv li, Z275 tus nqi kwv yees li 15-20% ntau dua Z180, tab sis qhov nce hauv corrosion kuj yog deb tshaj qhov nce ntawm tus nqi.
Kev ua haujlwm tsis zoo: Ib txheej zinc tuab heev txo cov tawv nqaij, ua rau nws yooj yim rau tawg thiab tev tawm (lub npe hu ua "powder" lossis "peeling") thaum khoov, stamping, thiab yob txoj kev. Qhov no cuam tshuam cov txheej adhesion thiab ua rau corrosion ntxov ntxov.
Txheej adhesion txaus ntshai: Ib txheej txheej zinc plating ntau dhau ua rau qhov roughness, cuam tshuam qhov sib txuam ntawm cov organic coatings thiab muaj feem ua rau blistering thiab tev ntawm cov xim txheej thaum lub sij hawm ntev - siv.
Q3: Puas muaj "qhov zoo tshaj plaws thickness ntau"?
A3: Yog lawm, feem ntau lees txais kev lag luam tsim nyog rau kev siv sib txawv thiab ib puag ncig. Cov hauv qab no yog cov lus pom zoo:
Daim ntawv thov scenarios|Pom zoo Zinc Txheej Nyhav (ob -sided)|Vim li cas Thicker Tsis pom zoo
General Sab Hauv Tsev Kho Kom Zoo Nkauj, Qhov Cuab Yeej Cuab Yeej|60-80 g/m²|Tshaj 80 g / m² yog qhov hnyav heev rau qhov chaw sab hauv tsev, nkim nqi.
General Industrial Cog, Warehouses|100-140 g/m²|140 g / m² yog txaus rau 10-15 xyoo lifespan; thicker thicknesses yuav tsum tau tshwj xeeb dabtsi yog khoov txheej txheem.
Kev ua liaj ua teb tsiaj txhu, siab-Qhov kub thiab siab-Kev cob qhia av|140-180 g/m²|Tshaj 180 g / m² ua rau muaj kev pheej hmoo ntawm zinc txheej tawg thaum ua.
Kev tsim kho ntug dej hiav txwv, Chemical Area|180 -275 g/m²|275 g / m² yog qhov txwv siab tshaj rau feem ntau cov qauv. Cov txheej txheej ntau tshaj 275 g / m² (xws li Z350) tsis tshua muaj siv rau xim -coated coils vim muaj kev ua haujlwm nyuaj heev thiab muaj peev xwm siv aluminium-zinc plating los hloov.
Q4: Yog hais tias ib puag ncig yog corrosive heev, dab tsi yog cov kev daws teeb meem zoo dua yam tsis muaj zinc txheej thickness?
A4: Nyob rau hauv ib puag ncig hnyav heev (xws li cov Islands tuaj lossis cov chaw ua haujlwm muaj zog acid pos huab), tsuas yog ua kom cov zinc txheej tuab tsis pom zoo. Hloov chaw, hom substrate yuav tsum tau hloov pauv lossis txheej txheej txheej hloov kho dua tshiab:
Hloov mus rau kub-dip aluminium zinc (GL): Ntawm tib lub thickness, GL tus corrosion kuj yog 2-6 npaug ntawm GI. Piv txwv li, GL 120g / m² muaj qhov zoo corrosion kuj zoo dua li GI 275g / m², thiab nws kuj muaj kev ua tau zoo dua thiab qis dua.
Hloov mus rau zinc aluminium magnesium (ZAM): Cov txheej txheem tshiab no muaj zog ntawm tus kheej - kho lub peev xwm ntawm kev txiav, thiab nws cov corrosion kuj yog 5-10 npaug ntawm GI. Txawm tias ib txheej nyias nyias tuaj yeem ua tau raws li qhov xav tau siab heev.
Txhim kho cov txheej txheem txheej txheej: Siv lub siab- huab cua- tiv taus (HDP) lossis fluorocarbon (PVDF) txheej, ua ke nrog qhov nruab nrab - tuab, siab - txheej txheej zoo, yog qhov zoo dua li tsuas yog piling ntawm zinc txheej.
Q5: Raws li tus neeg yuav khoom, kuv yuav ua li cas tshawb fawb xaiv cov zinc txheej tuab thiab zam qhov kev xav tsis zoo tias "thicker zoo dua"?
A5: Ua raws li cov kauj ruam no:
** Qhia meej txog kev siv ib puag ncig thiab tsim lub neej: ** Ua ntej, txiav txim siab seb qhov project puas nyob hauv av, hauv thaj chaw muaj kev lag luam, lossis raws ntug dej hiav txwv. Puas yog 5-xyoo, 10-xyoo, lossis 20-xyoo tsis muaj xeb puas tsim nyog? Qhov no yog lub hauv paus rau kev xaiv.
** Xa mus rau qhov kev txwv qis ntawm cov qauv, tsis txhob ua qhov muag tsis pom qhov hnyav: ** Nrog lub teb chaws tus qauv GB / T 12754 lossis ISO 14713. Raws li koj qhov kev xav tau ntawm ib puag ncig thiab kev ua neej, xaiv qhov hnyav yam tsawg kawg nkaus uas ua tau raws li qhov xav tau. Piv txwv li, yog tias tus qauv xav tau 120g / m² kom tau raws li 10 xyoo, tsis tas yuav xaiv 180g / m².
** Tus nqi sib npaug thiab kev ua haujlwm: ** Yog tias daim ntawv duab yog qhov nyuaj (yuav tsum muaj ntau qhov khoov lossis kos duab sib sib zog nqus), nws yog qhov zoo dua los xaiv qhov nruab nrab tuab (piv txwv li, 140g / m²) nrog cov khoom ruaj khov (xws li zinc txheej, zoo adhesion) dua li cov khoom tuab heev (piv txwv li, 275g / m²) cov khoom uas ua rau tawg. Tsis tas li ntawd, paub meej tias qhov tsawg kawg yog dabtsi yog khoov vojvoog rau qhov hnyav nrog tus neeg muag khoom.