Koj pom cov lus nug no tshwm sim hauv specs thiab RFQs txhua lub sijhawm. Cov lus teb luv luv yog feem ntau yog, nws yog zinc-coated, nws zoo. Tab sis yog tias koj tau nyob rau ntawm qhov chaw saib lub hnub nyoog qauv, los yog phem dua, cuam tshuam nrog kev hu rov qab ntawm kev sib txuas ua tsis tiav, koj paub tias nws tsis tshua yooj yim. Cov lus teb tiag tiag nyob rau hauv cov ntsiab lus ntawm ib puag ncig, qhov zoo ntawm plating, thiab hais ncaj ncees, qhov ua tau zoo txhais tau li cas rau qhov project lifespan piv rau tsuas yog ib lo lus ntawm kev siv tshuaj ntsuab. Cia peb qhib qhov ntawd.

Lub Allure thiab Qhov Tseeb ntawm Zinc Txheej

Electro-galvanizing yog qhov txaus nyiam rau qhov laj thawj. Nws feem ntau siv nyiaj ntau dua li kub-dip galvanizing thiab muab ib qho huv, du tiav uas zoo li zoo nkauj tawm ntawm lub thawv. Cov txheej txheem cuam tshuam nrog electroplating txheej ntawm zinc rau ntawm cov hlau fastener. Qhov kev ntsuas tseem ceeb txhua tus cuam tshuam ib puag ncig yog txheej tuab, feem ntau tsom rau thaj tsam 5-8 microns rau cov qauv electro-galvanized bolts. Cov txheej no muab kev tiv thaiv kev tiv thaiv. Nws lub cev tiv thaiv cov hlau los ntawm ya raws thiab huab cua.

Tab sis ntawm no yog thawj lub tswv yim hiccup: txheej ntawd nyias. Thiab nws tsis yog metallurgically sib raug zoo li hauv kub-dip. Kuv tau pom cov khoom siv uas cov txheej txheem tsis sib xws, tshwj xeeb tshaj yog nyob rau hauv cov xov thiab hauv qab lub taub hau - qhov chaw muaj kev ntxhov siab heev. Ib tus neeg xa khoom tuaj yeem thov ua raws li ASTM B633, hais tias, SC Hom 2, tab sis tsis muaj cov txheej txheem tswj hwm, koj tau txais qhov tsis muaj zog. Ib lub tuam txhab zoo li HANDAN ZITAI FREWER RAUG UA MOV., Ltd.Raws li Tuam Tshoj lub chaw tsim khoom loj hauv Yongnian, Hebei, yuav muaj peev xwm ua haujlwm loj, tab sis lub luag haujlwm yog nyob ntawm tus neeg yuav khoom los xyuas qhov zoo sib xws rau cov khoom siv sab nraum zoov, tsis yog xav tias nws.

Yog li, rau lub vaj tsev nyob rau hauv ib qho kev nyab xeeb qhuav? Tej zaum zoo rau xyoo. Rau ib tug ntug dej hiav txwv railing, ib tug choj accessory nyob rau hauv ib tug rainy cheeb tsam, los yog ib tug qauv nrog tas li ntub-qhuav cycles? Qhov nyias nyias, uas muaj feem cuam tshuam tsis zoo yuav dhau los ua qhov tsis muaj zog tshaj plaws. Daim ntawv thov kev ruaj ntseg pib tawg thaum cov khoom xav tau hloov hauv 5 xyoos.

Corrosion Mechanisms: Nws tsis yog xeb xwb

Cov neeg xav tias sab nraum zoov thiab daim duab tsis zoo li xeb. Qhov kev muaj tiag yog qhov chaw nyob thiab vicious. Ob lub ntsiab killers rau electro-galvanized fasteners sab nraum zoov yog xeb dawb thiab galvanic corrosion.

Dawb xeb yog cov hmoov dawb tso nyiaj uas koj pom ntawm zinc. Nws tshwm sim thaum cov zinc txheej ntub dej tas li thiab tsis tuaj yeem tsim nws ruaj khov tiv thaiv patina (zinc carbonate). Hauv cov chaw nyob sab nraum zoov uas cov dej zaum-xws li nruab nrab ntawm qhov chaw clamped lossis hauv qhov uas tsis muaj qhov dej-drained-lub zinc corrodes sacrificially thiab sai sai. Kuv tau sib cais kev sib txuas tom qab ob lub caij nyoog kom pom cov zinc feem ntau hloov mus rau cov hmoov dawb, tawm hauv cov hlau ze li liab qab.

Galvanic corrosion yog tus neeg tua neeg uas ntsiag to. Ua ke ib qho electro-galvanized steel bolt nrog aluminium framing, los yog phem dua, tooj liab los yog stainless hlau, nyob rau hauv lub xub ntiag ntawm ib tug electrolyte (dej nag txaus), thiab koj tsim ib lub roj teeb. Cov zinc, ua ntau anodic, corrodes sai heev los tiv thaiv lwm yam hlau. Kuv nco qab ib qhov project siv Electro-galvanized bolts kom ruaj ntseg tooj liab flashing trim. Cov spec tau maj. Tsis pub dhau 18 lub hlis, lub taub hau ntsia liaj qhov rooj tau raug pov tseg loj heev, cuam tshuam qhov kho. Kev kho yog tag nrho, kim hloov nrog insulated stainless hlau. Thawj cov nyiaj khaws cia tau raug tshem tawm.

Txheej Integrity thiab xov teeb meem

Ib qho mob tshwj xeeb yog threads. Cov txheej txheem electroplating tuaj yeem tawm nkig, tsim txheej txheej ntawm cov xov crests. Thaum lub sij hawm installation, cov txheej no yuav nti los yog flake tawm. Tam sim no koj muaj kev ntxhov siab riser nrog xoom corrosion tiv thaiv. Peb pib qhia cov txheej txheem chromate hloov dua siab tshiab (daj iridite lossis xiav xiav) ntawm electro-galvanized bolts rau kev tiv thaiv me ntsis ntxiv, tab sis txawm tias tsuas yog txheej txheej passivation ntawm zinc, tsis yog kho rau kev puas tsuaj. Torquing down ib tug ntsia liaj qhov rooj tuaj yeem txhuam nws tawm ntawm lub txiv ntoo los yog lub qhov taub.

Case in Point: The Low-Cost Fence Project

Ib qho piv txwv ntawm ob peb xyoos dhau los. Ib lub tiaj ua si hauv nroog xav kom nruab ntau pua meters ntawm tubular steel fencing. Nyiaj txiag nruj. Cov spec hu rau galvanized bolts. Tus neeg cog lus, tsom rau qhov kev sib tw qis tshaj plaws, tau txais cov khoom pheej yig electro-galvanized bolts, yuav los ntawm cov neeg tsim khoom loj. Lawv saib ci ntsa iab ntawm kev teeb tsa.

Ceev ceev rau peb xyoos, nyob rau hauv ib cheeb tsam uas muaj kev lag luam nruab nrab thiab txoj kev ntsev tsuag rau lub caij ntuj no. Lub laj kab thav ntawv tau zoo (kub-dip galvanized), tab sis txhua lub taub hau thiab cov txiv ntoo yog qhov tsis sib haum ntawm cov xim liab thiab cov pob zeb dawb. Qhov corrosion tsis zoo heev uas qee cov txiv ntoo raug ntes, xav tau lub kaum sab xis kom tshem tawm thaum lub sij hawm retrofit. Lub luag haujlwm tseem ceeb yog xoom - pov tseg ntau ntawm kev ua haujlwm thiab cov khoom siv rau kev kho ntxov ntxov. Muaj qhov tshwj xeeb hu ua kub-dip galvanized (HDG) fasteners kom phim lub laj kab ntaub, los yog zoo dua, mechanical galvanizing rau zoo tib yam xov txheej, lub neej voj voog yuav yooj yim ob npaug los yog tripled.

Qhov no yog qhov uas cov ntsiab lus tseem ceeb. Ib lub chaw tsim khoom lag luam, zoo li Zitai Fastener nyob ib sab ntawm txoj kev thauj khoom loj (Beijing-Guangzhou Railway, Expressway), hais txog kev ua haujlwm zoo, tsis yog khoom tsim nyog. Koj yuav tsum tau khawb rau hauv lawv cov txheej txheem tshwj xeeb rau sab nraum zoov-qib electro-galvanizing, yog tias lawv txawm muab nws ua cov khoom lag luam siab.

Thaum twg Electro-Galvanized Ua Haujlwm Sab Nraud?

Nws tsis yog txhua qhov kev puas tsuaj thiab kev ntxhov siab. Muaj niches. Kev txiav txim hu tuaj mus rau ib puag ncig hnyav thiab kev nkag tau yooj yim rau kev saib xyuas.

Rau sab hauv lossis sab nraum zoov cov ntawv thov (xws li nyob rau hauv lub ru tsev ventilated truss system tiv thaiv los ntawm huab cua ncaj qha), electro-galvanized yog zoo kawg nkaus txaus. Nws corrosion kuj yog txaus tiv thaiv atmospheric av noo ib leeg.

Lwm qhov xwm txheej yog rau cov qauv sab nraum zoov ib ntus npaj rau kev tshem tawm thiab rov siv dua hauv lub sijhawm luv luv, hais 1-3 xyoos. Qhov ua tiav du ua rau tuav tau yooj yim dua. Tsis tas li ntawd, yog tias lub fastener yuav tom qab pleev xim los yog hmoov-coated raws li ib feem ntawm lub rooj sib txoos, cov txheej electro-galvanized muab ib tug zoo, huv si tus yuam sij rau cov xim system thiab ntxiv ib txheej ntxiv ntawm kev tiv thaiv. Tab sis cov xim pleev xim yuav tsum tsis zoo thiab siv tau zoo - khawb thaum lub sijhawm teeb tsa lossis kev pabcuam yuav tsim cov ntsiab lus tseem ceeb rau kev xeb.

Kev Txiav Txim Siab: Kev Ncaj Ncees yog Kev Ua Haujlwm ntawm Lub Neej

Yog li, rov qab mus rau lo lus nug tseem ceeb. Puas yog electro-galvanized bolts ruaj khov rau kev siv sab nraum zoov? Kuv coj, los ntawm kev sib tw nrog qhov kev xaiv ntau zaus, yog qhov no: lawv tuaj yeem ua tau, tab sis tsuas yog nyob rau hauv cov txheej txheem nqaim heev uas feem ntau tsis tau ntsib hauv cov ntsiab lus sab nraum zoov.

Kev ruaj ntseg tiag tiag txhais tau tias xaiv cov khoom siv rau lub neej kev pab thiab ib puag ncig kom tsis txhob ua tsis tiav ntxov thiab hloov pauv. Rau feem ntau xav tau kev siv sab nraum zoov - ntug hiav txwv dej, cov av noo siab, kev lag luam, de-icing ntsev raug, lossis cov qauv ruaj khov - tus qauv electro-galvanized fasteners yog qhov kev xaiv muaj kev pheej hmoo siab. Cov kev xaiv ruaj khov dua yog kub-dip galvanized, mechanically galvanized, lossis stainless hlau (xws li 304 lossis 316, nyob ntawm qhov raug chloride). Lawv cov nqi nce siab dua yog amortized dua ntev dua, kev saib xyuas tsis pub siv lub neej.

Kev xav zaum kawg: ib txwm qhia nrog qhov tseeb. Tsis txhob cia li sau galvanized. Qhia meej txog cov txheej txheem (piv txwv li, ASTM A153 rau kub-dip), txheej thickness, thiab lwm yam kev kho mob ntxiv. Thiab rau cov pob qij txha tseem ceeb, xav txog kev tshuaj xyuas ntawm qhov chaw ntawm thawj pawg ntawm fasteners. Kev kuaj ntsev sai sai rau ASTM B117, txawm tias tsuas yog kuaj 96-teev, tuaj yeem qhia ntau yam txog tus neeg muag khoom qhov zoo piv rau daim ntawv thov. Nws txuag lub ntiaj teb kev mob taub hau tom qab, tig qhov kev thov theoretical sustainability thov mus rau qhov ua tau zoo, nyob rau hauv qhov tseeb.