Dab tsi cuam tshuam rau cov corrosion tsis kam ntawm SGCC Kub - dip phab ntsa galvanized steel?
Lub corrosion tsis kam ntawm SGCC kub - dip galvanized steel los yog ib qho ntawm cov nyhuv steel yog ib qho ntawm cov nyhuv ntawm galvanized txheej ntawm substrate (steel ntawv). Cov nyhuv tiv thaiv no yog cuam tshuam los ntawm ntau yam, suav nrog cov hauv qab no:
1. Zinc Txheej Thickness thiab kev sib xyaw
Zinc Txheej Thickness: Qhov no yog qhov tseem ceeb tshaj plaws cuam tshuam rau corrosion tsis kam. Lub thicker lub zinc txheej, ntau zinc nws tuaj yeem dissipate (tiv thaiv cov ntawv hlau los ntawm "kev txi), thiab lub neej ntev dua. Piv txwv li, cov xeb tsis kam ntawm z27 (275g / m²) yog qhov zoo dua li ntawm Z08 (xws li ib puag ncig corrosive (xws li ntug dej hiav txwv thiab chaw muaj kev thaj chaw).
Kev sib txuam: tsis sib xws zinc txheej faib tuaj yeem ua rau tsis txaus Xub yuav xum tsim nyob rau hauv cov chaw no, nrawm corrosion ntawm substrate. Qhov ruaj khov ntawm kub - pa taws galvanizing (xws li siv cov txheej txheem hluav taws xob saum zinc) {3}
Zinc Txheej Txheej Txheem: kub {- dim galvanizing feem ntau yog cov txheej txheem rau saum npoo av: fe}}}}}}}}} Ntau dhau cov txheej tuab tuab yuav ua rau cov txheej zinc me ntsis los ua tus brittle (yooj yim heev Ib qho kev sib txuam tsim nyog piv txwv yog qhov tseem ceeb rau kev ua kom corrosion tsis kam.
Zinc purity: impurities xws li hmoov txhuas, cadmium, thiab hlau nyob rau hauv lub zinc introchemical kev ua si, ua rau muaj kev sib zog hauv zos, ua rau muaj kev sib zog hauv zos. Cov txheej txheem niaj hnub no txo qhov cuam tshuam ntawm cov impurities los ntawm kev tswj hwm zinc daws kev huv (zinc cov ntsiab lus ntau dua lossis sib npaug ntawm 98%).
3. Ib puag ncig cov khoom siv
Corrosive Media:
Ib puag ncig muaj cov av noo thiab cov ntsev nyob rau thaj chaw dej hiav txwv (zinc hydroxide) ntawm zinc nto, nrawm nrawm zinc sib txawv.
Cov tshuab hluav taws xob (muaj cov sulphures Av lossis dej Ph: Zinc Kev pov thawj zoo heev corrosion tsis zoo rau hauv ib qho nruab nrab alkaline (pH <
Qhov kub thiab txias thiab UV: High Kub Kub Kev Ntsuas Cov Tshuaj Txhuam Cov Tshuaj Txhuam Tej Zaum Yuav Ua Rau Cov Laus thiab Kev Ua Yeeb Yaj Kiab, tsis ncaj qha txo corrosion.
4. Steel substrate cov yam ntxwv
Qhov xwm txheej saum npoo ntawm cov txheej txheem (txias {{ Cov chaw no muaj feem ntau rau Zinc Detachment, tawm hauv lub substrate nthuav tawm rau corrosion.
Substrate muaj pes tsawg leeg: ntau dhau silicon (si) thiab phosphorus (p) (SGCC tus qauv muaj kev txwv nruj rau Si thiab P.) 5. Post - kev thiab saib xyuas
Cov txheej saum npoo av xws li cov txheej txheem SKCC, txo kev sib cuag corrosion thiab piv txwv, cov cuab yeej siv hauv tsev feem ntau tau pleev xim).
Cov khoom puas tsuaj: yog tias zinc txheej puas los ntawm kev sib tsoo lossis kev sib txhuam, cov zinc ntawm cella yuav tsim lub galvanic cell nrog lub meej (cov zinc ua raws li anode thiab tab tom noj). Txawm li cas los xij, kev puas tsuaj ntau dhau yuav ua kom nrawm dua corrosion thiab yuav tsum tau kho sai.
Kev tu thiab kev txij nkawm: ntev -}}}}}}}}}}}} yuav nqus tau cov dej noo, kev tsim ib puag ncig corrosive. Kev tu tsis tu ncua tuaj yeem txo cov nqi corrosion.
Hauv cov ntsiab lus, cov corrosion tsis kam ntawm SGCC yog qhov ua haujlwm ntawm zinc txheej uas muaj cov khoom siv, cov txheej txheem tswj, thiab tshaj tawm {{0} Taug kev tu. Hauv cov ntawv thov tiag tiag, cov txheej zinc uas tsim nyog yuav tsum tau xaiv raws li qhov hnyav ntawm cov kev tiv thaiv corrosion, thiab kev tiv thaiv kev tiv thaiv tsim nyog tau siv kom txuas lub neej pabcuam.