Gusuru na sittali mai karya ya sa aiki don gudanen rarrabawa ta hanyar kofin zinki wanda ya daga cikin sittali ba ta hanyar kofin wanda za a iya fuskansa ba. Don abokan da suka rubuta gida a yankin da suka ƙara yaki, kuma yankin da suka ƙara tsohon ko yankin da suka ƙara al'adu, farko ne wannan farko ya kare waɗannan abubuwan da ke cikin gusuru ya zama daidai a cikin biyu goyin da uku kuma ya zama daidai a cikin biyu goyin da ashirin kuma daidai. Wannan matsala ya bayyana yadda ake gudanen rarrabawa, lokacin da ke cikin gudanen rarrabawa, kuma yadda ake gudanen rarrabawa ta hanyar karya da yawa.
Yadda Hot-Dip Galvanizing Ya Aiki
Abin da Gusuru na Sittali Mai Karya Ya Samu Daga Kofin Zinki
Tsarin galvanize na sika steel ya ke da wani tsari na yadda ya ke iya karewa a matsayin yadda ya ke amfani da shi a yau da kullum. Tsarin hot-dip yana cirewa steel mai kyau don zama a cikin zinc mai gaba a 450 °C. Yadda yake taimaka wajen samun tsari na iron-zinc alloy a cikin metal ta hagu, kuma tsari na zinc mai gaba a cikin kuma. Don haka tsarin yake cirewa a darajar molecule, yayi kuma yana canza da abu ne ya ke cirewa ba tare da kusursur ba. Wanda ke nufin cirewa ne ya ke karewa abu ne ya ke cirewa kuma ya ke aiki kamar tsarin yadda ya ke cirewa—kowace cut ya kare zinc na gaba don kusursur kuma kare steel ta hagu. Ba kamar paint, zinc ya rufe kowane kusursur kuma kowane karamin karamin da spray line suna fuskanta.
Tsarin Cirewa da Karamin Salt-Spray
Kwayar kuma na coating ya zama yadda ƙwayar kuma na shield ya dura, kuma kwayar kuma ya zama ƙarfi don raba wani abu ne da kwayar kuma na steel section. Abubuwan da suka dacewa da kwayar kuma kamar purlins suna samun coating mai gaba daya da abubuwan da suka dacewa da kwayar kuma kamar columns, amma suka dacewa da kwayar kuma da kwayar kuma na mass na section. A cikin salt-spray testing a matsayin neutral don ASTM B117, coating na 85 µm ta yawa ta tsaya da red rust don 700 zuwa 1,000 hours, amma a cikin yankin haɗa da hawayen da suka dacewa da al'ada yana dura sosai saboda kewayoyin haɗa da hawayen da suka dacewa da al'ada suna dacewa da kwayar kuma da kwayar kuma na mist. Abubuwan da suka dacewa da kwayar kuma suna bukata kuma da kwayar kuma na thickness ba tare da kuma da kuma da kwayar kuma na value a cikin frame ba. Abubuwan da suka dacewa da kwayar kuma suna kara zinc sosai saboda kwayar kuma na corrosion ta zama sama kuma ta cire kwayar kuma na layer don kowace shekara. Wani design da ke amfani da columns da suka dacewa da kwayar kuma yana bada kwayar kuma na margin a cikin yankin da suka dacewa da kwayar kuma ba tare da kuma da alloy.
Kwayar kuma na Service a cikin yankin da suka dacewa da al'ada
Coastal, Industrial da Rural Exposure
Farko na ƙaramin yanzu daga kai suna canza duk abu. Wani gida na gari mai zuwa cikin wuri ne zai iya samun farko na karamin yanzu ta hanyar 1–2 µm na zinc a cikin shekara, amma wani wuri na kai da salt zai iya taimaka wannan farko ta uku. Al’adu na industriya da suka cire yanzu da abubuwan da suka shiga su ke cikin bayanin biyu. Sai dai wani gida na galvanized steel da aka saita a 500 m daga kai ne zai iya ci gaba da wani gida mai sauƙi a cikin dock, saboda zinc zai iya karama da yawa kafin da salt zai iya cire a wani wuri. Wani hukuma na amfani zai ci gaba da gida a cikin karamin dune na farko inda salt zai iya cire a yau da kullum. Kadan karamin zuwa cikin wuri ne zai iya taimaka wajen karamin shekaru da yawa kafin da ake buƙatar rarraba a farko.
Me ya sa farko na coating ya farka a cikin wuri
A cikin salinity, drainage da moisture mai zama a wani lokaci ta hanyar yadda ake amfani da shi yanzu suka yi tushen yadda ake amfani da shi a wani kari. Crevices na yadda ake samun ruwa, plates na yadda ake daga cikin kuma ba su da sealant, da ledges na yadda ake samun gaskiya suka yi micro-environments inda zinc ya zama mafi kyawu. Orientation kuma yana da matata: surfaces na yadda ake daga nasa na kudu a northern hemisphere suna zama mafi yawa. Don galvanized steel structure, mapping na wannan hali a lokacin design yana neman inganci don specify slightly heavier coatings idan environment ya bukatar, kuma yana gudan yadda ake amfani da shi a wani kari.
Design da Fabrication Choices
Drainage, Welds da Bolted Connections
Za a faru galvanizing mai kyau daga kudin rukuni. Kullum bayanai na gaba daya yana bukatar hole na foforo da hole na shiga don suka tashi zinku cikin kuma suka furo ta hanyar sauri; amma idan ba su da su, hawaye ko ruwa na gaba yana sanya alama. Idan an rubuta galvanized steel structure ta hanyar sauran foforo, duk wani abu ne ya zama da coating ta hanyar abu daya, kuma ba za a sami kamar da ba su da coating ba. Welds suka kashe kamar da kasa kuma suka dace, saboda welds mai kasa suna baiwa coating mai kusa. Bolted connections da 10.9S high-strength bolts suna kara yadda ake aiki a waje kuma suna iya kara coating a cikin workshop. Idan aka cut ko aka drill a waje bayan galvanizing, suka bare steel kuma yana bukatar repair da zinc-rich paint na muhimmi.
Material Grades da Standards
Kwalitasin bayanai ana amfani da standadun da suka gano. ISO 1461 yana tsarci karamin galvanizing na steel mai bincike, amma ASTM A123 yana kawo coating na zinc a North America; EN 1090 da ISO 3834 suna tsarci kwalitasin bincike da welding na frame, kuma ISO 9001 yana nuna sistematin kwalitasin factory. Kamar yadda zai iya ci gaba da kwallon galvanized steel structure, yana da muhimmanci cewa steel ya kashe wani abu—Q355B ko Q355D mai yawa da silicon zai yi amfani da galvanizing daidai kuma zai samu layer mai kyau da ke taka daidai. Yankin mill certificates da reports na coating-thickness zai kare amintattun da aka saba da shi ne a matsayin sabon bayani da aka duba. Wani yankin kwanaki ɗaya ko duba na al’umma na gaba daya a cikin factory yayi amfani da chemistry na bath da karamin dipping zai kare farko na bayani da kwalitasin actual.
Aikin da kuskuren
Ina duba muna baya
Kullum fayilur suka faru a karamin, shi da karamin bultu, da wani irin lokaci da ruwa ta zama. A cikin yanzu na gaba daya, ya kamata mu sanya tushen mu a karamin dukkanin, kuma karamin gutturu, karamin base plates a tsakiyar rashi, da karamin cuttin da aka saukar. Kujiya zinc da aka ba da karamin magnetic gauge a wadannan karamin yana nuna karamin da aka yi da zinc a cikin shekara kafin ruwa ta zama. Kada ku samu karamin da ke kara karamin kamar haka, kuma kada ku saukar karamin da ke kara karamin kamar haka. Kujiya wadannan karamin a cikin shekara kafin yana nuna karamin da aka yi da karamin da ke kara karamin kamar haka. Wadanda suka yi amfani da acidic runoff ko fertilizer dust, suka yi amfani da karamin da ke kara karamin kamar haka, saboda wadannan abubuwan da suka yi amfani da zinc da suka yi amfani da karamin da ke kara karamin kamar haka.
Saukaro mai yawa wanda ya taimaka wajen karamin zaman.
Kudin kariya yana zama ƙarami idan aka fara shi da farko. Kusantar abubuwa mai tsoro daga cikin kofin da kara koyaushe a matsayin wani hanyar da ke haifar da ruwan da ya ƙare kariya. Kusantar wurin da aka bincika ta hanyar rubutu na zinc paint ya saita kariya ta gaba daya. Wani gurbi na galvanized steel wanda ya samu wannan kariya mai yawa yana amfani da shi akan 30 zuwa 50 shekara a yankin da suka dace, kuma yankin da suka dace a kafin kusantar kuma yana samun 20 shekara kafin ina bukatar kariya mai yawa.
Za a zaɓi gurbin galvanized steel ba tare da lambar ƙarfafawa kuma tare da kuskuren karkara, alamun yanki da kuskuren kariya a cikin wani shirin. Ta hanyar hot-dip bonding, kuskuren koyaushe da kuskuren kariya ta shekara, gurbin ya ba da kariya mai yawa akan kusantar kariya da karamin kariya ta kowane shekara—wannan ne kamar yadda ma'aikin industriya suka neman daga wani gurbi da ke da kariya mai yawa.
Masu Sabon Gaskiya
Suyayi
Yadda hot-dip galvanizing an sanya shi a cikin gurbin na steel?
Amsa: Tsarin ya faru da karya da karya don fuskanta shi na steel mai kyau, bayan da suka yi karya da karya, suka gudan shi a zinc mai zama a 450 °C. Bayan haka, zinc mai zama ya daga abin da aka karya da karya ya zama a kowane yanki da aka gudan shi, wanda ke cikin kowane yanki da za a iya gudan shi idan aka sanya hole na karya da karya. Kuma galvanized steel structure ya fito daga bath ta hanyar barrier mai kyau da mai tsayi daidai wanda ya sa akwai jini da kowane yanki da kowane kaya wanda paint ba za ta iya samun su.
Suyayi
Yaya yanzu na amince ne galvanized coating zai iya bauta?
Amsa: A atmospheres na rural, frame mai kyau da aka karya da karya yana iya aiki 50 shekara ko karanci kafin amince na farko, amma a sites na industrial da urban yana iya samun 30 zuwa 40 shekara. A coastal locations da salt spray mai kyau zai rufe wannan yanzu zuwa 20 shekara. Yanzu na amince ya daga thickness na coating, pollution na lokaci da design na drainage ba daga abin da aka karya da karya alone.
Suyayi
Shin galvanizing ya cire bukatun amince?
Amsa: Galfa galfa yana kara kama babu aiki wanda ke cire aikin sa. Aikin da aka yi ta hanyar duba mai sau daya ga kulle, base plates da kulle irin cut edges suka nuna loss of zinc na farko kafin red rust ya faru. Kulle irin debris suka cire daga ledges da kulle irin downpipes suka taimaka wajen rufe kuma kamar yadda ruwa ba za ta kawo ba. Kullum kamar yadda suka dace suka taimaka wajen rufe da zinc-rich paint. Wannan aikin da kamar yadda suka dace ya kara tsawon aiki na coating da kamar yadda suka dace a matsayin karami.
Suyayi
Yaya a sani thickness na coating a lokacin da aka samu shi?
Amsa: Thickness an sani da magnetic gauge a many points a cikin columns, beams da purlins, sannan an compare shi da standard da aka specify kamar ISO 1461 ko ASTM A123. Minimum local da average values suka pass, ba kamar yadda suka dace a single spot ba. Masu amfani da karami suka bayyana coating-thickness report da mill certificates a cikin shipment. Yadda ake neman wannan documentation a lokacin da aka yi procurement yana kara kama disputes da kuma yana nuna cewa corrosion protection an samu shi.
Suyayi
Za a iya rufe galvanized areas da suka dace ba?
Amsa: Ee. Wani cut, weld ko scratch wanda ya bayyana steel mai zuwa a yanzu ya wasa, ya daga kuma ya rubuta da zinc-rich paint ko low-melt zinc solder stick. Alamar da aikin da suka saita kuma ya saita sababbin barrier a wani lokaci da yawa. Don hanyoyin karami, wannan shi ne aikin da yawa wanda ba za a bukata full re-coating. Karamin da yawa a cikin wani member mai zuwa ba ta kasance kamar yadda ake fahimta kuma zai sa mu gudanen ko mu saita shine galvanizing a cikin workshop.
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