Vim li cas "dawb xeb" tshwm ntawm galvanized steel ntawv? Nws kho tau li cas?
Answer: White rust is zinc hydroxide formed by oxidation of the zinc layer in a humid environment (relative humidity >85%). Cov teeb meem suav nrog: noo khaws cia nrog qhov cua tsis zoo; Nag thaum thauj. Kev Kho Mob: Yog tias muaj xeb dawb yog me, so nws nrog daim ntaub qhuav. Yog tias nws hnyav dua, so nws nrog daim ntaub dampened nrog dej sov, ces nws qhuav nws nrog rau nws cua qhuav nyob rau hauv ib qho chaw qhuav nyob rau hauv ib qho dej qhuav nyob rau hauv ib qho dej qhuav nyob rau hauv ib qho chaw qhuav nyob rau hauv ib qho chaw qhuav.
Kuv yuav kho li cas "liab xeb" ntawm galvanized steel ntawv?
Teb: Kev kho mob yog nyob ntawm qhov xwm txheej. Yog tias tus xeb liab yog me (tsuas yog cov zos hauv zos), ua ntej xuab zeb tawm ntawm cov xeb dawb (ua rau cov khoom siv huv si (ua kom zoo nkauj), tom qab ntawd kos zinc thiab todcoat. Yog tias cov xeb liab yog qhov ntau (tshaj li 5%), cov txheej zinc muaj qhov ua tsis tiav ntau, thiab nws pom zoo los hloov cov ntawv hlau. (Kho yog tus nqi thiab muaj lub sijhawm luv luv.)
Dab tsi ua rau "Zinc Nodules" thiab "Zinc Slag" kom tshwm rau saum npoo ntawm galvanized steel ntawv? Nws puas cuam tshuam dab tsi?
Teb: Zinc Nodules thiab Zinc Slag yog tsim thaum impurities (xws li hlau {}}}} dip galvanizing. Cov no feem ntau yog tshwm sim los ntawm cov kev tswj hwm qis zinc thiab tsis muaj tseeb. Kev cuam tshuam: Rau cov ntawv thov kom zoo nkauj), lawv tuaj yeem cuam tshuam cov khoom siv. Rau cov txheej txheem sib xyaw (xws li tus neeg zov me nyuam), lawv tsis cuam tshuam rau lub zog, tab sis lawv tuaj yeem ua xim ntau dua nyuaj (lawv yuav tsum tau polished du ua ntej).
Vim li cas thiaj li muaj xeb galvanized yog vim khoov tom qab khoov tom qab khoov?
Teb: Cov txheej zinc yog ncab thiab compressed thaum khoov, ua rau tawg lossis tev tawm, ua rau cov khoom siv hauv paus. Kev daws: Xaiv cov ntawv galvanized nrog cov khoom lag luam zoo (xws li qis -} ecloy galvanized ntawv) ua ntej khoov; Tswj cov khoom khoov (tsis txhob muaj khoov ntau dhau); Thiab thov zinc uas muaj primer rau cov khoov tom qab khoov.
Yuav muaj daim ntawv falvanized xeb yog tias nws tuaj ua kev sib tiv tauj nrog lwm cov hlau (xws li stainless hlau)? A: Muaj peev xwm. Yog tias ob qho yog sib chwv ncaj qha thiab hauv cov yas av muaj peev xwm: cathode) thiab ua rau muaj xeb nyob hauv zos lossis xim liab ntawm cov ntawv galvanized. Kev daws: Qhov chaw insulating cov khoom siv (xws li roj hmab lossis yas mats) qhov twg ob qho kev sib cuag kom tsis txhob muaj kev sib cuag ncaj qha.
Vim li cas thiaj li Galvanized daim ntawv xeb nrawm dua li xav tau thaum siv hauv kev siv tshuaj lom? A: Vim tias huab cua hauv cov tshuaj cog qoob loo muaj cov roj acidic (xws li so₂ thiab clr 0.) lossis alkaline plua plav. Cov tshuaj no rau kom sib tw zinc oxide thiab ua kom sai nrog cov zinc, nrawm nws hnav. Kev daws: Hloov daim ntawv nrog zinc - Alkali Corrosion (uas muaj cov tshuaj fluorocarbon (ib qho tshuaj lom neeg fluorocarbon) lossis siv cov tshuaj fluorocarbon (cov tshuaj lom neeg.