Q: Dab tsi yog qhov sib txawv ntawm corrosion tsis kam ntawm Q195 thiab Q235 nyob rau ib puag ncig atmospheric?
A: corrosion tshuab: feem ntau cuam tshuam los ntawm oxygen, dej me me ntawm plua plav, ntawm} {) {{1}.
Kev ua tau zoo ntawm Galvanized Txheej:
Kub-dip galvanized txheej (60-85 μm):} galvanized yuav tsis pib corrode kom txog thaum lub zinc txheej yog noj .
Electropated Zinc Txheej (8-15 μm): Lub neej ntev yog {}}} Cov khoom siv hauv tsev) {}}
Qhov sib txawv: Tsis muaj qhov sib txawv ntawm ob . Cov txheej txheem corrosion ntawm txheej thiab tsis muaj ib yam dab tsi nrog lub zog ntawm av steel {}}
Q: Dab tsi yog qhov sib txawv ntawm corrosion tsis kam ntawm Q195 thiab Q235 hauv cov chaw muaj chaw nyob ib puag ncig?
A: corrosion mechanism: acidic roj xws li so kua qaub (ntau dua lossis sib npaug ntawm 85μm)} {1} Mus txog 10-20} xyoo, thiab kev ncaj ncees ntawm cov txheej txheem yuav tsum tau kuaj xyuas cov tsev thiab muaj teeb meem chimney) {}} € œ electrogalvanizing (<15μm): The service life is less than 5 years, and "white rust" (zinc oxide corrosion product) is prone to occur, and paint needs to be applied.
Q: Nyob rau hauv lub marine cua ib puag ncig (muaj kev mob siab), dab tsi yog qhov sib txawv ntawm corrosion tsis kam ntawm Q135?
A: corrosion tshuab: cov tshuaj tsuag ntsev (ua kom muaj cov txheej txheem ntawm cov hlau galvanemical:}} {{{{{{{{{{{{{{{{{{{{{{1} yog hais txog 8-15} xyoo (xws li cov chaw nres nkoj, tab sis cov xim zinc<20μm): Service life is <3 years, not recommended for marine environment. • Alternative: If long-term salt spray resistance is required, hot-dip galvanized aluminum-magnesium alloy coating (such as Zn-Al-Mg) can be selected, and the corrosion resistance is 3-5 times that of ordinary galvanized layer.
Q: Nyob rau hauv ib puag ncig dej ntshiab (kev mob siab), dab tsi yog qhov sib txawv ntawm corrosion tsis kam ntawm Q195 thiab Q235?
A: Corrosion System: Cuam tshuam los ntawm yaj oxygen, microorganisms thiab cov zaub mov hauv qab zib ntau dua li cov roj galvanized ({60-85 μm): ob qho tib si ua ke (pH Epoxy-coated steel kav yuav tsum tau siv hloov .
Q: Nyob rau hauv ib puag ncig dej hiav txwv (siab corrosion), dab tsi yog qhov sib txawv ntawm corrosion tsis kam ntawm Q195 thiab Q235?
A:Corrosion mechanism: High concentration of Cl⁻ destroys the passivation film of the zinc layer, forming pitting, and the corrosion rate can reach 30-60μm/year. • Performance of galvanized layer: ◦ Hot-dip galvanizing (≥100μm): The service life is only 5-10 years (such as offshore bridge pile foundations and ship structures), and cathodic protection (such as sacrificial anodes) is required. ◦ Not recommended scenarios: Deep sea environment (>50 meters dej tob) lossis cov khoom siv ntev ua haujlwm, nws raug nquahu kom ncaj qha siv cov cua dav hlau (xws li Q355Snh) lossis stainless hlau (316L) {4 4}}