Ikhoyili yentsimbi eyenziwe ngesinyithi ime njengomgangatho wehlabathi wokumelana nokuthotywa kweendleko ezisebenzayo kuwo wonke amacandelo okuvelisa kunye nokwakha. Ngokudibanisa i-zinc layer ekhuselayo kwi-substrate yensimbi, le nto inika ukhuseleko olubalulekileyo kwizinto ezifunekayo, ukuqinisekisa ukunyaniseka kwesakhiwo apho isinyithi esingaphathwayo siya kusilela. Nangona kunjalo, ukukhetha ngokulula 'intsimbi ekhandiweyo' kunqabile ngokwaneleyo ukuqinisekisa ukusebenza. Owona mceli mngeni ulele ekujongeni umsantsa woncedo: ngelixa uninzi lwabathengi beqonda ukuba i-zinc ixhathisa umhlwa, bambalwa abazibamba ngokupheleleyo iimpembelelo zobunzima obuthile bokugquma (ezifana ne-G60 ngokuchasene ne-G90) okanye ukuhluka kwenkqubo eyahlukileyo phakathi kweendlela ezishushu zokuntywila kunye ne-electro-galvanizing.
Ukungaphumeleli ukungqamanisa iinkcukacha zobugcisa kwindawo ekujoliswe kuyo kudla ngokukhokelela kwiziphumo zeprojekthi eyintlekele, kubandakanywa ukuthotywa kwangaphambi kwexesha kunye nobuthathaka besakhiwo. Esi sikhokelo sijonge ukuvala eso sikhewu ngokuqhagamshela iimeko ezithile zokusetyenziswa kwemizi-mveliso ngokuthe ngqo kwiinkcukacha zobugcisa ezifunekayo ukuze kuphumelele. Ngokuqonda i-nuances yobunzima bokugquma, imigangatho yokubumba, kunye nemiqobo yokusingqongileyo, unokuqinisekisa ubude bezinto eziphathekayo kunye nokwandisa imbuyekezo kutyalo-mali kumgca wakho wokuvelisa okanye iprojekthi yokwakha.
Izinto eziphambili zokuThatha
Ixabiso eliPhambili: I-galvanized steel balance balance upfront cost kunye nokuqina kwexesha elide ngokukhuselwa kwedini (i-zinc ibingelela ngokwayo ngentsimbi).
Ulawulo lweCandelo: Okubalulekileyo kulwakhiwo (ukwenza isakhelo/uphahla), iimoto (iipaneli), kunye nezolimo ngenxa yokunyamezelana okuthe ngqo kokusingqongileyo.
Umngcipheko wokuKhetha: Ukusebenzisa ubunzima bokugquma obungalunganga (umzekelo, i-G60 kwindawo enomhlwa ophezulu) kukhokelela ekungaphumeleli kwangaphambi kwexesha; iindawo eziselunxwemeni zihlala zifuna ezinye iindlela ezifana neGalvalume okanye iAluminiyam.
Ingcebiso yokuThenga izinto: Ukukhethwa kwezinto eziphathekayo kufuneka kuchazwe ngumgangatho we-ASTM A653 kunye neemfuno ezithile zokwenza (i-lock-forming vs.
Izicelo ezingundoqo zoShishino kunye neeMfuno zokuSebenza
Ukuguquguquka kwe-Galvanized Steel Coil kuyivumela ukuba isebenze njengomqolo kumashishini ahlukeneyo. Nangona kunjalo, icandelo ngalinye lifuna iseti eyodwa yeepropathi zoomatshini kunye neenkcukacha zokugquma ukuze zimelane nemeko ethile yokusebenza kwayo.
Ulwakhiwo kunye nezibonelelo (Umqhubi weVolume)
Ulwakhiwo lungowona mthamo mkhulu wokusetyenziswa kwentsimbi enamazinki kwihlabathi jikelele. Kweli candelo, izinto zisebenza imisebenzi emibini eyahlukeneyo: inkxaso yesakhiwo kunye nokukhusela okusingqongileyo.
Ukusetyenziswa koLwakhiwo: Kwi-Light Gauge Steel Framing (LGS), ii-purlins, kunye neegirts, eyona mfuno iphambili kukuqina kwesivuno. Abavelisi ngokuqhelekileyo baxhomekeke kwiBanga le-33, i-50, okanye i-80 yensimbi yokuqinisekisa ukuba i-skeleton yesakhiwo inokuxhasa imithwalo ebalulekileyo. Okubaluleke kakhulu, la macandelo asebenzisa i-G60 ukuya kwi-G90 yobunzima bokugquma. Kuba la malungu ahlala evaleleke ngaphakathi kweendonga okanye kwiinkqubo zophahla, akhuselwe kwimvula ethe ngqo kodwa kufuneka axhathise ukufuma kunye nokuxinana okunokuthi kubeke esichengeni isidima solwakhiwo ekuhambeni kwexesha.
Imvulophu yokwakha: Uphahla kunye neepaneli ezisecaleni zijongene nokuvezwa ngokuthe ngqo kwimitha ye-UV, imvula kunye nekhephu. Ngelixa isetyenziswa rhoqo njenge-substrate ye-Pre-Painted Galvanized Iron (PPGI), i-zinc layer ihleli ibalulekile. Ukuba ipeyinti ikhutshwe, i-zinc inika umgca wesibini wokukhusela. Ukukhetha umgangatho ochanekileyo we-substrate kubalulekile apha; ukugqiba okugudileyo kuqinisekisa ukunamathela kwepeyinti efanelekileyo, ukuthintela ukuxobuka okanye ukugqabhuka iminyaka phantsi komgca.
Iziseko zophuhliso: Iindlela zokugada ezindleleni, iikholvethi, kunye neenxalenye zebhulorho zisebenza kwezona meko zinzima kakhulu onokucinga ngazo, zijongene neetyuwa ezindleleni, ubutyobo kunye nokufuma okungaguqukiyo. Ezi zicelo zifuna i-zinc-duty-duty coatings, ehlala idlula amabakala orhwebo asemgangathweni, ukubonelela amashumi eminyaka yenkonzo yokugcinwa kwempahla. Iinjineli zizibeka phambili ezi mathiriyeli kuba ukubuyisela iziseko zophuhliso kunzima kwaye kuyabiza.
Uveliso lweemoto (Umqhubi ochanekileyo)
Umzi-mveliso weemoto uqhuba iteknoloji entsha yokwenza itekhnoloji, ukutyhala izinto ezibonelela ngamandla aphezulu kumlinganiselo wobunzima ngaphandle kokuncama ukumelana nokudleka.
Iipaneli eziveziweyo: Amalungu angaphandle afana neefenders, iihoods, kunye neengcango zeengcango zifuna umphezulu ococekileyo wokupeyinta. Apha, abavelisi bavame ukusebenzisa 'i-Galvannealed' intsimbi. Olu tshintsho lubandakanya unyango lobushushu emva kokugquma oluguqula i-zinc coating ibe yi-zinc-iron alloy. Isiphumo singumgangatho we-matte owamkela ipeyinti ngokulula kwaye unikezela ngokugqibeleleyo ukuwelda, kubalulekile kwimigca yendibano ezenzekelayo.
Amacandelo angavezwanga: Amalungu angaphakathi anje nge-chassis, iziqinisekiso, kunye nefreyimu yokuhlala ayifuni imfezeko yobuhle kodwa ifuna ukhuseleko oluphezulu lomqobo. Intsimbi ecocekileyo yentsimbi eshushu-diphu yeyona nto ikhethwayo apha. Ivumela abenzi be-automakers ukuba basebenzise i-thinner, i-gauge lighter yentsimbi ephezulu yokunciphisa ubunzima besithuthi-ukuphucula ukusebenza kakuhle kwamafutha-ngelixa uqinisekisa ukuba isakhelo asiyi kugqwala kwi-spray yendlela okanye ukuqokelela ityuwa.
EzoLimo kunye nokuValelwa kweZilwanyana (Isixhasi seMichiza)
EzoLimo zibonelela ngocelomngeni olukhethekileyo lwekhemikhali olungeyomveliso eqhelekileyo: ubukho beammonia. Izisele zeenkozo, iishedi, neentlanti zezilwanyana zihlala zisesichengeni sokufuma nenkunkuma yezilwanyana.
Ngoxa i-Galvalume (i-aluminium-zinc alloy) iphezulu kwiimeko ezininzi ze-atmospheric, iqhuba kakubi kwiindawo zokuvalelwa kwezilwanyana. I-ammonia efunyenwe kwi-urea kunye nomgquba iphendula ngokukrakra kunye ne-aluminiyam, ibangele ukuhla okukhawulezileyo kokugquma. Ikhoyili yentsimbi eyiGalvanized iphumelela kule meko ikhethekileyo kuba i-zinc yayo ecocekileyo inika ukuxhathisa okuphezulu kwiikhompawundi zealkali. Kumafama kunye nabakhi bezolimo, ukukhetha intsimbi esemgangathweni ngaphezulu kwe-aluminiyam-based alternative ngumahluko phakathi kwe-silo ehlala iminyaka eyi-10 xa kuthelekiswa neminyaka engama-30.
I-HVAC kunye neeNdawo zoMbane
Kumacandelo oomatshini kunye nombane, ukubumba kunye neempawu ze-electromagnetic zihamba phambili ecaleni kokumelana nokubola.
I-Ductwork: I-HVAC yokudonsa ibandakanya ulwakhiwo oluntsonkothileyo, kubandakanywa iihem eziqinileyo kunye neecrimps. Olu setyenziso lufuna intsimbi ethi 'Tshixa-Ukwenza umgangatho' (LFQ). Izinto ze-LFQ zicutshungulwa ukuze kuqinisekiswe ukuba i-zinc yokugqoka ibambelela ngokuqinileyo kwisiseko sesinyithi nangona i-180 igobile. Ngaphandle kolu luhlu, i-zinc ibiya kugqabhuka okanye ixobuke kwindawo ekugoba kuyo, ishiya intsimbi ibekwe kwindawo ejiyileyo kunye nomhlwa ngaphakathi kwenkqubo yokuphefumla.
Iindawo ezivalekileyo zoMbane: Iitreyi zekhebhula, imibhobho ye-conduit, kunye neekhabhathi zeseva zisebenzisa intsimbi kwi-electromagnetic interference (EMI) yokukhusela amandla ayo. I-zinc layer ikhusela ezi nkqubo zibalulekileyo kwi-corrosion yendalo ngaphandle kokuphazamisa iimpawu zemagneti zentsimbi, ukuqinisekisa ukuba izinto zombane ezibuthathaka zihlala zikhuselekile kwaye zomile.
IiTekhnoloji zokuTyatshaniswa kokuTyatyholwa kokuphela kokusetyenziswa
Ayizizo zonke iingubo ze-zinc ezenziwe ngokulinganayo. Ukuqonda inkqubo yokwenziwa kwemveliso kunye neziphumo ezibalulwayo kubalulekile ekulungelelaniseni imathiriyeli kubomi obucetyiweyo kunye nokusingqongileyo.
I-Hot-Dip Galvanized (HDG) vs. Electrogalvanized (EG)
Indlela yokusetyenziswa itshintsha ngokusisiseko iimpawu zemveliso yokugqibela. IHot-Dip Galvanized (HDG) ibandakanya ukugqithiswa komcu wentsimbi ngokuthe ngqo kwibhafu yezinki etyhidiweyo. Oku kudala i-metallurgical bond phakathi kwe-zinc kunye nentsimbi, okukhokelela kwi-coating ebanzi, ehlala ixesha elide. I-HDG lolona khetho lukhethwayo kusetyenziso lwangaphandle, olunzima, kunye nolwakhiwo olufana ne-racking yelanga kunye nefreyim yolwakhiwo apho ukhuseleko oluphezulu lomqobo lungenakuxoxisana.
Ngokwahlukileyo, i-Electrogalvanized (EG) intsimbi iveliswa nge-electroplating zinc phezu kwentsimbi. Le nkqubo ivelisa isiqhamo esincinci kakhulu, esifana kakhulu, kunye nokugqitywa kwe-matte. Ngelixa inika ukhuseleko lokutya okuncinci kune-HDG, ibonelela ngomgangatho ophakamileyo wokupeyinta. I-EG ifanelekile kwizicelo zangaphakathi, ezifana nezixhobo zasekhaya, iikhomputha zekhomputha, kunye nezakhiwo zangaphakathi zezakhiwo apho ukuchaneka kunye nobuhle bodlula ukuxhathisa imozulu.
Ukutyeba koKutyunjwa (umlinganiselo we-G)
Kumgangatho we-ASTM A653, iintsimbi zokugquma zichongwa nge-'G' elandelwa linani elimele ubunzima obupheleleyo be-zinc kumacala omabini ephepha (ngekhulu le-ounce kwi-square foot). Ukuqonda esi sikali kubalulekile ekuthengeni izinto.
| Ukutyunjwa |
kweZinc Ukutyeba okuPhambili |
esiSiseko esiQinisekileyo |
kweSicelo |
| G30 / G40 |
Ukukhanya |
Izixhobo zangaphakathi, ifenitshala yeofisi, izixhobo |
Ukulawulwa yimozulu, iindawo ezomileyo zangaphakathi. |
| G60 |
Phakathi (Esemgangathweni) |
I-HVAC yoRhwebo, ukwakheka kwangaphakathi, iingcango zegaraji |
Ukufuma ngamaxesha athile, iindawo ezikhuselweyo zangaphandle. |
| G90+ |
Inzima |
Uphahla, izisele zezolimo, iziseko ezingundoqo zangaphandle |
Ukubonakaliswa okuthe ngqo kwimvula, ikhephu, kunye nezinto ezingcolisayo. |
Amanani aphezulu 'G' anxulumana ngokuthe ngqo nomaleko we-zinc ongqindilili. Ekubeni i-zinc corrodes kwizinga eliqikelelweyo, i-G90 yokugqoka iya kuhlala i-50% ixesha elide kune-G60 yokugqoka kwindawo efanayo ngaphambi kokuba i-rust ebomvu ibonakale kwisiseko sesinyithi.
Ukwahluka kweSpangle (Ubuhle vs. Ukusebenza)
'I-spangle' ibhekiselele kwipateni yekhephu elikhazimlisiweyo elibonakala kumphezulu wentsimbi enamanzi ashushu. Ngokomlando, i-spangle enkulu, enesibindi yayibonwa njengophawu lomgangatho. Namhlanje, ubukhulu be-spangle bulawulwa kwiimfuno ezithile zokusebenza.
I-Spangle eqhelekileyo: Ifaka inkangeleko yesiqhelo, ebonakalayo yekristale. Ifaneleke ngokugqibeleleyo kulwakhiwo oluqhelekileyo, iindawo ezingabonakaliyo, kunye nezicelo zangaphandle apho i-aesthetics iyisibini ekusebenzeni.
I-Zero okanye i-Spangle encinci: Iveliswe ngokuthintela ukukhula kwekristale ngexesha lenkqubo yokupholisa. Oku kugqitywa kuyafuneka kwiindawo zemoto okanye iipaneli zesixhobo eziya kupeyintwa. Umphezulu we-zero-spangle uqinisekisa ukuba i-crystalline texture ayifaki telegraph ngepeyinti, okukhokelela ekugqityweni okugudileyo, okukhazimlayo okuphezulu.
UVavanyo oluBalulekileyo: Apho ungaSebenzisi iNtsimbi yeGalvanized
Ukuhlola izinto eziphathekayo ngokunyanisekileyo kufuna ukwamkele ukusikelwa umda. Ngelixa iGalvanized Steel Coil inemisebenzi emininzi, ayingonyango lwendalo iphela. Iindawo ezithile ezingqongileyo ziya kuthoba i-zinc ngokukhawuleza, nto leyo ekhokelela kwiintsilelo ezibizayo.
Umda wonxweme
Amanzi etyuwa yikryptonite yentsimbi ekhandisiweyo. Kwiindawo ezinetyuwa eninzi-ngokuqhelekileyo echazwa njenge-1 ukuya kwi-3 yeemayile zonxweme-isitshizi setyuwa sikhawulezisa ukubola kwe-zinc kakhulu. Iikloridi ezikwizitshizi zolwandle zophula ipatina ekhuselayo edla ngokwenzeka kwizinc. Kwiiprojekthi kule mimandla, ukucacisa insimbi ye-galvanized kudla ngokuba yimpazamo. Endaweni yoko, amaqela okuthenga kufuneka acebise iAluminiyam okanye iStainless Steel, enika ukuxhathisa okungaphezulu kakhulu kumhlwa elwandle.
Iigalvanized vs. Galvalume (Al-Zn)
Abathengi bahlala bebhidanisa intsimbi yeGalvanized Galvalume, kodwa baneprofayili yokusebenza eyahlukileyo. I-Galvalume idibanisa i-aluminium, i-zinc, kunye ne-silicon. Kwiimeko eziqhelekileyo ze-atmospheric, i-Galvalume inokunikela ngamaxesha angama-2 ukuya kwe-4 ubude bentsimbi ye-galvanized ngenxa yokukhusela umqobo we-aluminium.
Nangona kunjalo, i-galvanized steel igcina i-advanteji ebalulekileyo 'kwi-edge creep.' Xa i-sheet isikwa, i-edge yentsimbi ekrwada iyavezwa. I-Zinc iyasebenza kakhulu kwaye iya kufuduka ukukhusela lo mgca wokusikwa (ukuziphilisa). I-Aluminiyam ayisebenzi kwaye inikezela ngokhuseleko oluncinci kwimiphetho eqingqiweyo. Ke ngoko, sebenzisa intsimbi yeGalvanized kwizicelo ezibandakanya ukubunjwa okubanzi, ukubetha, okanye ukucheba, kunye nokuvalelwa kwezilwanyana. Khetha i-Galvalume yophahla oluqhelekileyo lwemizi-mveliso kunye ne-perforations encinci.
Imingcipheko yokuGcina (iRust emhlophe)
Ukusilela okuqhelekileyo kwenzeka ngaphambi kokuba imveliso ifakwe. Ukuba iikhoyili ezenziwe ngegalvan zigcinwe kwindawo efumileyo, kwiindawo zokugcina ezingenamoya kakuhle, ukufuma kuyavaleleka phakathi kweeleya zentsimbi. Oku kuthintela i-zinc i-carbon dioxide efunekayo ukuze yenze umaleko wayo okhuselekileyo we-carbonate. Endaweni yoko, yenza i<em>zinc hydroxide—into emhlophe, engumgubo eyaziwa ngokuba yi- 'White Rust.' Lo monakalo unokuba sisigxina. Ukunciphisa oku, kufuna unyango lwe-passivation (i-chromating okanye i-oiling) ngexesha lokuthenga kunye nokuqinisekisa indawo yokugcina impahla elawulwa yimozulu.
Iingqwalasela zoRhwebo zokuFumana
Ukufumana icoil yentsimbi inzima kakhulu kunokufumana elona xabiso lisezantsi ngetoni nganye. Izinto ezininzi zorhwebo zinefuthe kwiiNdleko zizonke zoBunini (TCO) kunye nempumelelo yokwenziwa.
Iindleko zabaqhubi ngaphaya kwexabiso elisisiseko
I-invoyisi yokugqibela yekhoyili enezinki iphenjelelwa kakhulu ziintlawulo ze-zinc. Ekubeni i-zinc ithengiswa kwihlabathi jikelele kwi-LME (London Metal Exchange), ixabiso layo liyaguquguquka ngokuzimeleyo kwintsimbi. Iingubo ezityebileyo (i-G90 vs G60) zineentlawulo eziphezulu ze-zinc. Ukongezelela, amabakala aphezulu-amandla aphantsi alloy (HSLA) ayalela iiprimiyamu zamandla emveliso. Abathengi kufuneka bafakele kwiindleko zonyango olungaphezulu njengeengubo ezichasene neminwe okanye i-oyile enzima, ekhusela imathiriyeli ngexesha lokuhamba kodwa yongeza kumgca osezantsi.
UkuQeda kunye neeMetrikhi zokwenziwa
Ukukhetha ibakala lentsimbi engalunganga kunokumisa umgca wemveliso. Kubavelisi be-HVAC, **Umgangatho wokwenza ukutshixa (LFQ)** ubalulekile; iqinisekisa ukuba i-coating ayiqhekeki ngexesha lokugoba okunamandla. Ngokwahlukileyo, izitampu zeemoto kunye nezixhobo zombane zifuna ** Umgangatho woMzobo (DQ) ** okanye ** Umgangatho woMzobo onzulu (DDQ) ** intsimbi. La mabanga anolwakhiwo oluthile oluvumela isiseko sesinyithi ukuba solule kwiimilo ezintsonkothileyo (njengesitya sokuhlambela okanye i-fender yemoto) ngaphandle kokuqhekeka. Ukungahoyi ezi metrics kukhokelela kumazinga aphezulu okulahlwa kunye nenkcitho yempahla.
Uzinzo kunye ne-TCO
Nangona ixabiso eliphezulu eliphezulu xa kuthelekiswa nentsimbi 'emnyama' esemgangathweni, intsimbi enezibilini inika uhlalutyo olunyanzelekileyo lweendleko zoBomi. Ngokushenxisa imfuneko yokupeyintwa ngokutsha okanye ukulungiswa kangangeminyaka engama-20 ukusa kwengama-50, loo mbandela uyazihlawulela ngokwawo. Ngaphaya koko, i-zinc-steel composite i-100% inokuphinda isetyenziswe. Ekupheleni kobomi besakhiwo, intsimbi inokubuyiselwa kwaye inyibilike ukuvelisa iimveliso ezintsha ngaphandle kokulahlekelwa kwezakhiwo, ukulungelelanisa neenjongo zokuzinza zanamhlanje.
Ukuqukumbela
I-coil yensimbi ye-galvanized ayikho enye, imveliso ye-monolithic; luluhlu olubanzi lweenkcukacha ezilungiselelwe ukusebenzisana nemo engqongileyo ethile. Ukusuka kwiingubo ezinqabileyo, ezipeyintiweyo kumatshini wokuhlamba ukuya kukhuseleko olunzima lwe-G90 kwindlela yokugada uhola wendlela, impumelelo ixhomekeke ekuchanekeni. Umahluko phakathi kweprojekthi ehlala amashumi eminyaka kunye neyo engaphumeleliyo kwiminyaka embalwa ihlala ihla ekuqondeni umahluko phakathi kwe-hot-dip kunye ne-electro-galvanizing, okanye ukuqonda ixesha lokutshintshela kwi-aluminiyam kwiindawo eziselunxwemeni.
Ukuphunyezwa okuyimpumelelo kuqala ngokuchaza okusingqongileyo. Ngaba ikhona ammonia? Ngaba i-material iya kujongana nokufuma rhoqo okanye imitha ye-UV? Nje ukuba ezi ziguquguqukayo zifakwe kwimephu, ukukhetha ubunzima bokugquma obufanelekileyo kunye nebakala lentsimbi liba sisigqibo esiqhutywa yidatha endaweni yokuqikelela. Siyakukhuthaza ukuba ucele uthethwano ngemathiriyeli okanye ikhithi ethile yesampulu ukuze uqinisekise ukubambelela kubambelelo kunye nokugqiba komphezulu kumgca wakho wokuvelisa phambi kokuba uzibophelele kwiodolo epheleleyo.
FAQ
Q: Uthini umahluko phakathi kwe-G60 kunye ne-G90 yentsimbi?
A: Umahluko ulele kubukhulu bengubo ye-zinc. I-G60 inobunzima obupheleleyo be-coating ye-0.60 oz / sq ft, ngelixa i-G90 ine-0.90 oz / sq ft. I-G60 iqhele ukusetyenziselwa urhwebo lwangaphakathi okanye oluphakathi, ngelixa i-G90 ingumgangatho wophahla lwangaphandle kunye neemeko ezingqongileyo ezirhabaxa.
Umbuzo: Ngaba icoil yentsimbi ingapeyintwa?
IMPENDULO: Ewe, kodwa ifuna ukulungiswa ngendlela eyiyo. Imiphezulu emitsha eyenziwe ngegalati ikholisa ukuba mtyibilizi kakhulu okanye isebenze ngokwekhemikhali ukuba incamathele ngepeyinti eqhelekileyo. Kufuneka usebenzise i-primer ethile okanye unyango lwangaphambili ukuze udibanise umphezulu. Kungenjalo, ungathenga intsimbi ye 'Galvannealed' okanye 'Bonderized' steel, ezinyangwa ngekhemikhali okanye zicutshungulwe ngobushushu kwindawo yokusila ngokukodwa ukubonelela ngomphezulu okhawulezayo, olungele ipeyinti ngaphandle komsebenzi owongezelelweyo wokulungiselela.
Umbuzo: Ngaba intsimbi ekhandisiweyo iyarusa?
A: Ekugqibeleni, ewe. Intsimbi ekhuniweyo ixhathisa umhlwa ngenkqubo 'yedini' apho i-zinc igqwala endaweni yentsimbi. Kwiminyaka emininzi, i-zinc layer iya kuncipha kancinci. Emva kokuba i-zinc idliwe ngokupheleleyo, i-substrate yensimbi ibonakaliswe, kwaye 'i-Red Rust' (i-iron oxide) iya kwenza. 'Irust emhlophe' ngumba owahlukileyo-ibala lokugcina elenzeka xa i-zinc ibonakaliswe kubumanzi ngaphandle kokuhamba komoya.
Umbuzo: Ngaba intsimbi efakwe igalvanized ifanelekile kwiindawo zaselwandle?
A: Ngokubanzi, hayi. Kwiindawo ezingaphakathi kwe-1-3 yeekhilomitha zamanzi etyuwa, umxholo ophezulu we-chloride emoyeni ukhawuleza i-zinc corrosion, ihlutha umaleko wokukhusela ngokukhawuleza. Ukuvezwa ngokuthe ngqo elwandle, intsimbi engatyiwa okanye ialuminiyam lukhetho olungcono kakhulu. Ukuba kufuneka kusetyenziswe intsimbi ye-galvanized, ifuna ubunzima obukhulu kakhulu bokugquma (G210 okanye ngaphezulu) okanye inkqubo yepeyinti eyongezelelweyo yokukhusela (i-duplex coating).
Umbuzo: Buthini ubomi bekhoyili yentsimbi?
IMPENDULO: Ubomi buyohluka kakhulu ngokusekwe kungcoliseko namanqanaba okufuma. Kwindawo eyomileyo, yasemaphandleni, umgangatho we-G90 wokugquma unokuhlala ngaphezu kweminyaka engama-50. Kwimizi-mveliso enzima okanye imeko yasedolophini enongcoliseko olungakumbi, kwaloo nto inye inokuhlala iminyaka engama-20 ukuya kwengama-25. Ubuninzi be-coating ye-zinc, ixesha elide ubomi benkonzo.
