Iibholiti ze-Electro-galvanized: zizinzileyo kusetyenziso lwangaphandle? 

Uyabona lo mbuzo uvela kwii-specs kunye nee-RFQs ngalo lonke ixesha. Impendulo emfutshane, ehendayo ihlala ithi ewe, igqunywe ngezinc, ilungile. Kodwa ukuba ubukwisiza ubukele ubudala besakhiwo, okanye okubi ngakumbi, ujongana nokufowuna kunxibelelwano olungaphumeleliyo, uyazi ukuba kunqabile ukuba kube lula ngolo hlobo. Impendulo yokwenyani ihlala kwiinkcukacha zokusingqongileyo, umgangatho wokwalekwa, kwaye ngokungafihlisiyo, oko kuzinza kuthetha ntoni kubomi beprojekthi xa kuthelekiswa nokuba ligama lokuhlambela eluhlaza. Masiyikhuphe loo nto.

Umtsalane kunye neNyaniso yoMaleko weZinc

I-Electro-galvanizing inomtsalane ngenxa yesizathu. Ngokuqhelekileyo ineendleko ezingaphezulu kune-hot-dip galvanizing kwaye ibonelela ngokucocekileyo, ukugqiba okugudileyo okukhangeleka kakuhle ngaphandle kwebhokisi. Inkqubo ibandakanya i-electroplating umaleko we-zinc kwi-fastener yentsimbi. I-metric engundoqo wonke umntu ayigibiselayo bubunzima bokugquma, amaxesha amaninzi ijolise kwi-5-8 ye-microns kwiibholithi eziqhelekileyo zombane. Lo maleko ubonelela ngokhuseleko lomqobo. Ikhusela ngokwasemzimbeni intsimbi kubumanzi kunye nomoya.

Kodwa nantsi i-hiccup yokuqala ebonakalayo: olo luhlu luncinci. Kwaye ayibotshwanga ngokwesinyithi njengakwidiphu eshushu. Ndibone iibhetshi apho i-coating ingalingani, ngakumbi kwimicu kunye naphantsi kwentloko-ezona ndawo zoxinzelelo zigxininisa. Umthengisi unokubanga ukuhambelana ne-ASTM B633, yithi, i-SC Type 2, kodwa ngaphandle kolawulo lwenkqubo olungaguqukiyo, ufumana iindawo ezibuthathaka. Inkampani efana I-Sunnian Zitai Festener Fishaner Comment Com., esekelwe kwi-hub enkulu yokuvelisa i-fastener yase-China e-Yongnian, e-Hebei, iya kuba namandla okuqhuba okukhulu, kodwa i-onus iphezu komthengi ukuqinisekisa ukuhambelana komgangatho wezinto zangaphandle, kungekhona nje ukucinga.

Ke, kwishedi yegadi kwindawo eyomileyo? Mhlawumbi kulungile iminyaka. Ngomzila we-balcony yonxweme, i-accessory yebhulorho kwindawo enemvula, okanye nasiphi na isakhiwo esinemijikelo eyomileyo emanzi? Olo mqobo ubhityileyo, onokuthi ube nokungafezeki uba lelona khonkco libuthathaka. Ibango lokuzinza liqala ukuqhekeka xa imveliso ifuna ukutshintshwa kwiminyaka emi-5.

Iindlela zokuRhakala: AyingoMhlwa nje

Abantu bacinga ngaphandle kwaye bafanekisela umhlwa ofanayo. Ubunyani buhlala kwindawo kwaye bukhohlakele. Ababulali ababini abaphambili kwizibophelelo ze-electro-galvanized ngaphandle yirust emhlophe kunye negalvanic corrosion.

Umhlwa omhlophe ngumgubo wediphozithi oyibona kwi-zinc. Kwenzeka xa i-coating ye-zinc ihlala imanzi kwaye ayikwazi ukwenza i-patina yayo ekhuselekileyo yokukhusela (i-zinc carbonate). Kwiindawo ezikhuselweyo zangaphandle apho amanzi ahlala khona-njephakathi kweendawo ezivaliweyo okanye kwimingxuma yebholiti engavulwanga-i-zinc idla ngokuzincama kwaye ngokukhawuleza. Ndiye ndahlula unxibelelwano emva kwamaxesha amabini onyaka ukufumana i-zinc ubukhulu becala iguqulelwe ekubeni ngumgubo omhlophe, ishiya intsimbi iphantse yaze.

I-Galvanic corrosion ngumbulali othuleyo. Dibanisa ibholiti yensimbi ye-electro-galvanized kunye ne-aluminium framing, okanye ngakumbi, ubhedu okanye insimbi engenasici, phambi kwe-electrolyte (amanzi emvula anele), kwaye udala ibhetri. I-zinc, ekubeni i-anodic ngakumbi, i-corrodes ngokukhawuleza ukukhusela enye isinyithi. Ndikhumbula iprojekthi ndisebenzisa I-bolts ye-electro-golts ukukhusela i-copper flashing trim. I-spec yakhawuleza. Kwiinyanga ezili-18, iintloko zeebholiti zamoshwa kakhulu, nto leyo ebeka esichengeni ukulungiswa. Ukulungiswa kwakugcwele, ukutshintshwa kwexabiso eliphezulu kunye nentsimbi ye-insulated stainless. Ugcino lokuqala lwacinywa.

Ukugquma ingqibelelo kunye nengxaki ye Thread

Indawo ethile yentlungu yimisonto. Inkqubo ye-electroplating inokushiya i-brittle, i-high-building coating kwi-thread crests. Ngexesha lofakelo, le nto yokugquma inokugqabhuka okanye igqabhuke. Ngoku unesikhuseli soxinzelelo esinokhuseleko lwe-zero corrosion. Saqala ukucacisa iingubo zokuguqula i-chromate (i-iridite ephuzi okanye ecacileyo eluhlaza okwesibhakabhaka) kwiibholiti ze-electro-galvanized zokukhusela ngakumbi, kodwa naloo nto nje i-passivation layer kwi-zinc, kungekhona ukulungiswa komonakalo womatshini. Ukubethelela ibholiti kunokuyikhuhla kwi nut okanye umngxuma ocofayo.

Imeko kwindawo: IProjekthi yokuBiyela ngexabiso eliphantsi

Umzekelo obambekayo osuka kwiminyaka embalwa edlulileyo. Ipaki kamasipala yayifuna ukufakela amakhulu eemitha zocingo lwentsimbi ye-tubular. Uhlahlo lwabiwo-mali lwaluqinile. I-spec ibize iibholithi zegalvanized. Unokontraka, ejonge elona xabiso liphantsi, ufumene iibholiti ze-electro-galvanized ezifikelelekayo, ekunokwenzeka ukuba zivela kumvelisi omkhulu. Babonakala bekhazimla xa befakela.

Ukuqhubela phambili iminyaka emithathu, kwindawo enomoya ophakathi kwimizi-mveliso kunye nendlela yokutshiza ngetyuwa ebusika. Izakhelo zocingo zazilungile (i-hot-dip galvanized), kodwa yonke ibholiti yentloko kunye nendongomane yayibubumdaka berusi obubomvu kunye noqweqwe olumhlophe. I-corrosion yayimbi kakhulu kangangokuba amanye amandongomane abanjwa, efuna ukuba ii-angle grinders zisuswe ngexesha lokubuyisela. Inkalo yozinzo yayiyi-zero-inkunkuma enkulu yabasebenzi kunye nezixhobo zokulungiswa kwangaphambi kwexesha. Ukuba i-spec ibize ngokucacileyo iziqhoboshi ze-hot-dip galvanized (HDG) ukuze zingqinelane nelaphu locingo, okanye nangcono, ukugalela ngomatshini ukugquma kwentambo engaguqukiyo, umjikelo wobomi ubunokuphinda kabini okanye kathathu ngokulula.

Apha kulapho iinkcukacha zokukhangela zibalulekile. Indawo yomenzi, njengeZitai Fastener ikufuphi neendlela ezinkulu zezothutho (iBeijing-Guangzhou Railway, Expressway), ithetha ngobuchule bolungiselelo, hayi ukufaneleka kwemveliso. Udinga ukugrumba kwiinkqubo zabo zolawulo oluthile lwe-electro-galvanizing yangaphandle, ukuba bade banikezele njengomgca wemveliso ozinikeleyo.

I-Electro-Galvanized ingasebenza nini ngaphandle?

Asiyiyo yonke intshabalalo kunye nobumnyama. Kukho ii-niches. Ikhwelo lesigwebo lehla kubuqatha bemo engqongileyo kunye nokufikeleleka kogcino.

Kwizicelo zangaphandle zangaphakathi okanye ezikhuselwe ngokupheleleyo (njengangaphakathi kwenkqubo ye-truss yophahla olukhuselweyo kwimozulu ethe ngqo), i-electro-galvanized yanele ngokugqibeleleyo. Ukunganyangeki kwayo ku-corrosion yanele ngokuchasene nokufuma kwe-atmospheric kuphela.

Enye imeko yeyokwakhiwo zangaphandle zethutyana ezenzelwe ukuchithwa kwaye ziphinde zisetyenziswe kwixeshana elifutshane, masithi iminyaka eyi-1-3. Ukugqiba okugudileyo kwenza ukuphatha kube lula. Kwakhona, ukuba i-fastener iya kupeyintwa emva koko okanye i-powder-coated njengenxalenye yendibano, i-electro-galvanized layer ibonelela ngesitshixo esilungileyo, esicocekileyo senkqubo yepeyinti kwaye yongeza umaleko owongezelelweyo wokukhusela. Kodwa inkqubo yepeyinti kufuneka ihambelane kwaye isetyenziswe ngokufanelekileyo-imikrwelo ngexesha lofakelo okanye inkonzo iya kudala iindawo ezigxininisiweyo zokubola.

Isigwebo: Uzinzo nguMsebenzi weLifecycle

Ngoko, sibuyele kumbuzo ongundoqo. Ngaba iibholiti ze-electro-galvanized zizinzileyo ukuba zisetyenziswe ngaphandle? Ukuthatha kwam, ukujijisana nolu khetho ngokuphindaphindiweyo, yile: banokuba, kodwa kuphela phantsi kweemeko ezixinzelelekileyo ezihlala zingahlangabezwanga kwiinkcukacha zangaphandle eziqhelekileyo.

Uzinzo lokwenyani kuthetha ukukhetha imathiriyeli efanelekileyo kubomi benkonzo obulindelekileyo kunye nokusingqongileyo ukuphepha ukusilela kwangaphambi kwexesha kunye nokutshintshwa. Ubuninzi bezicelo zangaphandle ezifunayo-unxweme, ukufuma okuphezulu, i-industrial, i-icing ityuwa, okanye izakhiwo ezisisigxina-i-standard electro-galvanized fasteners lukhetho olusemngciphekweni omkhulu. Iinketho ezizinzileyo zishushu-dip igalvanized, mechanically galvanized, or stainless steel (njenge 304 okanye 316, kuxhomekeke kwi-chloride exposure). Iindleko zabo eziphezulu zangaphambili zihlawulelwa ixesha elide, ubomi benkonzo engahlawulelwayo.

Ingcamango yokugqibela: soloko ucacisa ngokuchanekileyo. Ungabhali nje ukhanyiswe. Cacisa inkqubo (umzekelo, i-ASTM A153 ye-hot-dip), ubukhulu bokugquma, kunye naluphi na unyango olongezelelweyo. Kwaye kumalungu abalulekileyo, qwalasela ukuhlolwa kwendawo yebhetshi yokuqala ye-fasteners. Uvavanyo olukhawulezayo lokutshiza ityuwa nge-ASTM B117, nokuba ngaba ukujonga iiyure ezingama-96, kunokutyhila okuninzi malunga nomgangatho womthengisi ngokuchasene nebango lekhathalogu. Igcina ihlabathi lentloko ebuhlungu kamva, ijika ibango lokuzinza kwethiyori ibe yinyani esebenzayo, esemhlabeni.