1.What yog qhov kev phom sij ntawm qhov tsis txaus ntseeg (saum npoo uas yog ib yam nkaus thiab du)?
Txhua yam siv hluav taws xob tsis ua hauj lwm: Cov khoom sib tsoo tsis tuaj yeem muab cov khoom siv hluav taws xob rau hauv tog hluav taws xob feem ntau yog cov txheej txheem sib xyaw ua ke, thiab cov quab yuam sib xyaw yog qhov tsis muaj zog.
Tsis pub ntsuas kub ntxhov siab lossis kev cuam tshuam tshuab, txheej yog yooj yim rau tev tawm ntawm lub interface (manifested li loj-thaj chaw delamination).
Tsis zoo Interface Wettabness nto lub zog yog tsawg, thiab cov kua txheej yog qhov yooj yim los tsim cov motrobubles lossis shrinkage qhov, tsim kev sib thooj.
Ntsev tsuag tsuage kuaj kev ua tau zoo: tus ntoo khaub lig-Hatch Adhesion ntsuas yuav tsim nyog, tab sis cov ntug blistering tus nqi nce ntau dua 50% tom qab 500h ntawm cov tshuaj tsuag ntsev.
2.What yog tus tseem ceeb tus nqi ntawm kev tsim nyog roughness?
Neeg kho tshuab ntsuas phoo nyhuv: qhov zoo tshaj plaws roughning cov qauv ib qho kev hnav khaub ncaws thiab ntom micro-peak-Valley qauv. Tom qab cov txheej txheej ua kua rau hauv lub hav hauv qab thiab solidifies, nws tsim "hook-tshuab interlocking, thiab adhesion nce los ntawm 3 txog 5 zaug.
Ua kom tau thaj chaw tiv tauj zoo dua: Rougening nce qhov chaw tiag tiag thaj tsam ntawm thaj tsam ntawm 30% mus rau thaj chaw pom zoo, muab cov chaw sib txawv ntau dua rau cov tshuaj lom neeg rau cov tshuaj lom neeg.
Txhim kho cov anti-permeability ntawm txheej: Qhov kev ntsuas ntsuas hluav taws xob txuas ntxiv ntawm cov tshuaj pleev ntsev rau hauv qab ntsev los ntawm ntau dua 40%.
3.Qhov dab tsi cuam tshuam ntawm kev sib tw dhau ntau (ntau dhau ntawm qhov chaw ntawm qhov ntev dua)?
Cov txiaj ntsig zoo ua rau corrosion: thaum lub vojvoog ntawm curvature txheej me me, nws dhau los ua thawj txheej nws tus kheej yuav tau noj sai dua.
Cov khoom tsis tiav txheej npog cov kev pab them sib sib zog nqus: Muaj qhov sib sib zog nqus tsis txaus xim zaj duab xis, tsim cov ntsiab lus hauv zos tsis muaj zog. Kev txiav txim siab ntxhov siab ua rau tawg: qhov txheej ntawm cov ntse micro-peaks yog raug rau cov kev ntxhov siab thiab kev ntsuas hluav taws xob lossis kev co.
4.What yog tus tseem ceeb tswj cov ntawv thov engineering?
Roughnence Kuaj Txuj Ci: RA thiab RZ Dual parameter tswj tau teev nyob rau hauv ISO 4287 yog nyiam.
Kev tshuaj xyuas zoo tsuas yog siv tsuas yog kuaj pom lossis daim kab xev txwv tsis pub.
Nto Kho Ua Ntej Painting
Sandblasting qib: SA 2.5 yog pom zoo rau kub-dip galvanized, thiab lub hom phiaj roughning yog RA 2.5μm.
Tshuaj lom neeg tshuaj lom neeg: phosphaating lossis passivation tsim kev hloov pauv cov kev hloov pauv hloov dua siab tshiab, kev siv ntxhib nce ntxiv los ntawm txog 0.5μm thiab kev ua yog txhim kho.
Txheej Txheej Xaiv
For high roughness surfaces (Ra>4μm), cov khoom lag luam loj Epoxy (muaj zog permeability) yog xaiv;
Rau cov chaw mos tsis tshua muaj (RA<1.5μm), modified primer containing silane coupling agent (enhanced chemical bonding) is selected.
5.Qhov yog "ntau ntau" ntawm roughness?
Muaj ib qho zoo tshaj plaws rau cov npoo roughness ntawm galvanized steel - ra 1.0μm (lossis rz 10 ~ 25μm). Hauv cov kab no: kho tshuab siv tshuab anchoring thiab tshuaj lom neeg muaj feem sib npaug, thiab adhesion yog maximized;
Cov txheej txheej txheej tuab yog tswj tau thiab muaj zog tiv taus nruab nrab rau kev nkag nruab nrab;
Zam kev corrosion hauv zos tshwm sim los ntawm ntau dhau kev ntxhib.
Hauv kev tsim khoom, nws yog qhov tsim nyog tswj hwm kev ntxhib los ntawm sandblasting / tshuaj kho cov txheej txheem tiv thaiv ntawm galvanized steel-txheej system rau ntau tshaj 30 xyoo.