Ee, zaku iya samun nasarar foda gashi galvanized karfe don ƙirƙirar ƙaƙƙarfan tsarin 'duplex' yana ba da ingantaccen juriya na lalata. Haɗa waɗannan nau'ikan kariya guda biyu yana haifar da ƙayyadaddun ƙaya mai iya tsira da munanan yanayin masana'antu.
Duk da haka, sabon saman galvanized ba a shirye yake don shafa foda kai tsaye daga wanka ba. Ba tare da tsayayyen shiri na zahiri da sinadarai ba, ba makawa rufin kariyar ka zai sha wahala daga fitar da iskar gas, tarwatsewa, da bala'i. Ba za ku iya kawai fesa foda a kan zinc ba kuma kuyi tsammanin zai ci gaba da dogon lokaci.
Wannan jagorar ya rushe dalilin aikin injiniya a bayan suturar duplex da kuma ramukan gama gari dole ne ku guje wa. Za mu bincika tsauraran ka'idojin shirye-shiryen ASTM da ake buƙata don mannewa mai ƙarfi. Za mu kuma samar da ma'auni na kimantawa don taimaka maka da kyau ƙayyade kayan da aka yi da foda don aikin gine-gine ko masana'antu na gaba.
Key Takeaways
2.5x Multiplier: Haɗa murfin foda tare da galvanizing mai zafi-tsoma yana samar da tasirin daidaitawa, yana ƙara tsawon rayuwar ƙarfe har zuwa sau 2.5 fiye da kowane shafi kadai.
Barazana Gas: Tarko da danshi da iskar gas a cikin tukwane na zinc zai faɗaɗa yayin maganin foda, yana haifar da ramuka. Dole ne 'kafin yin burodi' shine kawai abin dogaron ragewa.
Window Oxidation: Zinc yana da ƙarfi sosai. Da zarar an bayyana bayanan, dole ne a lulluɓe abubuwan da aka haɗa da galvanized a cikin canjin aiki guda ɗaya (mafi dacewa a ƙarƙashin sa'o'i 12) don hana samuwar zinc oxide marar ganuwa.
Daidaitaccen Yarjejeniya: Aikace-aikacen da aka yi nasara yana buƙatar bin ƙa'idodin ASTM D7803 da SSPC-SP 16.
1. Shari'ar Kasuwanci: Me yasa ake saka hannun jari a cikin Tsarin Duplex?
Fahimtar ma'amala tsakanin suturar foda da yadudduka na zinc yana da mahimmanci. Kuna ƙirƙirar tasirin kariya na aiki tare lokacin da kuka haɗa su. Polyester ko epoxy foda yana aiki azaman shinge na jiki mai tauri. Yana tunkude danshi, matsananciyar sinadarai, da shanyewar jiki. Idan karce mai zurfi ya keta wannan shingen, Layer na zinc da ke ciki yana kunna. Yana ba da kariya ta anodic hadaya, da farko lalata don kiyaye danda karfe daga tsatsa.
Wannan tsarin na'ura mai nau'i-nau'i yana rage mahimmancin sake zagayowar rayuwa. Farashin farko na aikace-aikacen ya fi girma fiye da tsarin shafa guda ɗaya. Koyaya, raguwa mai tsauri a cikin kulawa mai gudana yana sa tsarin duplex yayi tsada sosai. Ayyukan ababen more rayuwa da gine-gine suna amfana sosai daga wannan tsayin daka. Da kyar ba za ku buƙaci rufe ayyuka don gyara ba zato ko tsatsa ba.
Dorewa kuma yana taka muhimmiyar rawa a ƙayyadaddun zamani. Rufe foda yana haifar da hayaƙi kusan sifili Volatile Organic Compound (VOC). Bugu da ƙari, duk wani abin da ya wuce gona da iri ana samun sauƙin kamawa kuma a sake yin fa'ida. Yin amfani da kayan da aka yi da foda zai iya ba da gudummawa kai tsaye zuwa ƙididdige takaddun shaida na LEED, musamman don ingancin muhalli na cikin gida. Masu tsarawa suna daraja waɗannan kayan gini masu ƙarancin hayaki sosai.
A ƙarshe, tsarin duplex yana ba da ɗimbin kayan aiki. Aikace-aikacen yana da ma'auni da kyau a cikin girman aikin daban-daban. Kuna iya amfani da shi zuwa manyan katako mai rufin tsari na tsari. Hakanan zaka iya amfani da shi zuwa ci gaba galvanized karfe nada aiki. Yawancin layukan masana'anta masu sarrafa kansu sun dogara galvanized karfe sheet kayan da suka isa pre-rufi da shirye don ƙirƙira.
2. Babban Kalubalen Injiniya: Fitar da Gas da Zinc Reactive
Aiwatar da foda akan karfen galvanized mai zafi-tsoma yana gabatar da takamaiman matsalolin injiniya. Batun da ya fi fice shi ne abin da ya faru na fitar da iskar gas. A lokacin aikin galvanizing, ƙananan aljihu na danshi da iskar gas sun zama tarko a cikin saman tutiya mai ƙarfi. Daga baya, ɓangaren yana shiga cikin tanda mai warkewa don narke murfin foda. Wannan tanda yawanci yana gudana a kusa da 180°C (356°F).
Yayin da ƙarfen ya yi zafi, iskar gas ɗin da ke makale suna faɗaɗa cikin sauri. Suna tilasta hanyarsu ta waje ta hanyar polyester mai narkewa ko Layer epoxy. Wannan tserewar tashin hankali yana haifar da kumfa, ramuka, da ramuka. Waɗannan ramukan suna lalata ƙaƙƙarfan ƙayatarwa. Mafi muni, suna ba da tashoshi kai tsaye don danshi don ƙetare shingen foda mai karewa.
Wani babban ƙalubale ya haɗa da tarkon zinc oxide marar ganuwa. Zinc karfe ne mai saurin amsawa. Yana fara oxidizing nan da nan bayan bayyanar da iskar oxygen na yanayi. Yawancin mutane sun gane 'farar tsatsa' a matsayin alamar zinc oxidation. Duk da haka, ƙananan yadudduka na zinc oxide suna samuwa da daɗewa kafin farar tsatsa ya bayyana. Wannan Layer marar ganuwa yana aiki kamar garkuwar ƙurar ƙura. Yana lalata gaba ɗaya mannewa foda idan ba a kula da shi ba.
Canjin tsufa yana ƙara dagula dabarun shirye-shiryen ku. Dole ne tsarin ku ya canza dangane da ainihin shekarun saman tutin. Sabon galvanized karfe (a kasa da awanni 48) yana buƙatar kulawa daban-daban fiye da ɗan gajeren yanayi na zinc (wanda aka fallasa har zuwa shekara guda). Sabbin zinc yana buƙatar bayanin martaba mai ƙarfi. Zinc mai sanyi yana buƙatar tsaftataccen tsabtace sinadarai don cire taurin hydroxides da carbonates kafin ma fara bayanin martaba.
3. ASTM D7803 Ka'idodin Shirye don Rage Hatsari
Don hana delamination da pinholing, dole ne ka bi daidai matakan da aka zayyana a cikin ASTM D7803. Wannan ma'auni yana tsara shirye-shiryen da ya dace na kayan shafa galvanized mai zafi don aikace-aikacen foda.
Mataki na 1: Sinadari da Tsabtace Soyayya
Dole ne ku fara cire duk wani gurɓataccen yanayi, mai, da mai. Lalacewar jiki kamar bumps, gudu, da ɗigon zinc suma suna buƙatar niƙa a hankali. Yi amfani da raunin alkaline ko raunin acidic mafita don wanke sinadaran. Kada a taɓa amfani da sinadarai masu tsauri. M strippers za su narkar da m Layer na zinc gaba daya. Koyaushe kurkure saman sosai da ruwa mai tsabta kuma tabbatar da bushewa gaba ɗaya kafin a ci gaba.
Mataki na 2: Bayanan Bayani na Surface (SSPC-SP 16)
Tsarin tutiya mai santsi mai santsi ba zai iya riƙe fenti na foda ba. Dole ne ku ƙirƙiri bayanin martabar anga ɗan ƙarami. Koyaya, daidaitaccen nauyi mai ƙura mai ƙarfi yana lalata ƙarfe galvanized. Yana yaga da zinc daidai daga karfen karfe.
Madadin haka, ma'aunin SSPC-SP 16 yana buƙatar takamaiman dabarar 'Sweep Blasting'. Masu aiki dole ne su yi amfani da maras ƙarfe, ƙananan taurin abrasives (Taurin sikelin Mohs ≤ 5). Gilashin da aka murƙushe ko bawoyi na goro suna aiki daidai. Bututun fashewar dole ne ya kasance a kusurwar 30° zuwa 60° mara zurfi. Wannan aikin share fage a hankali yana ɓata haske sosai. Yana haifar da madaidaicin maki ba tare da cire mahimmin madaidaicin babban Layer na zinc (Eta). Wasu wurare kuma suna amfani da bayanan sinadarai ta hanyar jiyya na zinc ko baƙin ƙarfe phosphate a matsayin ingantaccen madadin share fashe.
Mataki na 3: Maganin zafin jiki (Kafin yin burodi)
Wannan shine muhimmin matakin kula da haɗarin ku don hana fitar da iskar gas. Kafin yin amfani da kowane foda, dole ne a fara yin gasa danda, ƙarfe mai siffa. Dole ne a saita zafin tanda 30°C (~ 50°F) sama da zafin zafin foda na ƙarshe. Dole ne ku riƙe ƙarfe a wannan yanayin zafi na akalla sa'a ɗaya.
Wannan matsananciyar zafi yana tilasta danshi da iskar gas da ke danne su fadada da tserewa yayin da karfen yake babu. A lokacin da kuka yi amfani da ainihin foda, ƙananan pores ba su da komai. Ba za su fashe ba yayin lokacin magani na ƙarshe.
Mataki na 4: Aikace-aikacen gaggawa (Tagar Lokaci)
Lokaci shine babban abokin gaba da zarar saman ya kasance mai tsabta kuma an bayyana shi. Kuna fuskantar tagar lokaci mai tsauri don yin amfani da farfagandar hana fitar da iskar gas da rigar saman ƙarshe. Matsayin masana'antu na buƙatar aikace-aikace a cikin sa'o'i 12 na bayanin martaba. Da kyau, ya kamata ku kammala dukkan tsari a cikin daidai wannan canjin aikin. Jinkirta aikace-aikacen yana ba da damar zinc oxide mara ganuwa don yin gyare-gyare, wanda nan take zai lalata mannewar ku.
Takaita Chart: ASTM D7803 Shiri Guda
Mataki |
Sunan tsari |
Maɓalli Aiki |
Manufar Farko |
1 |
Chemical Cleaning |
Aiwatar da raunin alkaline/acid mafita |
Cire mai, kwayoyin halitta, da ɗigon zinc na zahiri. |
2 |
Tsara Tsawa |
Yi amfani da Mohs ≤ 5 abrasives a kusurwa 30°-60° |
Ƙirƙiri bayanan anga na inji ba tare da rasa zinc ba. |
3 |
Thermal Degassing |
Gasa a + 30 ° C sama da zafin jiki na tsawon awa 1 |
Ƙaddamar da iskar gas don hana ramukan gaba. |
4 |
Aikace-aikacen gaggawa |
A shafa foda a cikin awanni 12 |
Hana zinc oxide mara ganuwa daga lalata mannewa. |
4. Galvanized vs. Galvannealed Karfe: Ƙayyadaddun Substrate Dama
Ƙayyadaddun kayan aiki suna tasiri sosai ga nasarar tsarin duplex ɗin ku. Dole ne ku fahimci bambanci tsakanin daidaitaccen ƙarfe na galvanized mai zafi mai zafi da galvannealed karfe. Daidaitaccen galvanizing mai zafi-tsoma yana samar da keɓaɓɓen, tsantsa saman Layer na tutiya. Yawancin lokaci yana fasalta ƙirar spangle mai gani. Galvannealing yana ƙara ƙarin tsari (dumi) nan da nan bayan wankan zinc.
Wannan ƙarin zafi yana haifar da baƙin ƙarfe daga ƙarfen da ke ƙasa don yaduwa sama zuwa cikin zinc. Yana haifar da m tutiya-baƙin ƙarfe gami Layer. Wannan yana canza kamannin gani zuwa ƙarewar launin toka. Mafi mahimmanci, yana da matuƙar canza alaƙar murfin saman.
Karfe na Galvannealed yana da fasalin daɗaɗɗen ƙasa na halitta. Yana aiki kamar soso na microscopic. Paint da foda coatings sun danganta sosai ga wannan gami. Sakamakon haka, kayan galvannealed galibi suna buƙatar ƙarar fashewar fashewar abubuwa idan aka kwatanta da kayan tsomawa na gargajiya. Hadarin delamination yana raguwa sosai.
Dole ne masu siye suyi la'akari da waɗannan bambance-bambance a hankali yayin samowa. Ƙayyadaddun ma'auni Karfe Galvanized yawanci ana fifita don mahalli mai nauyi inda ake buƙatar matsakaicin kauri na tutiya na hadaya. Koyaya, idan kuna kera ingantattun fatun na'urori ko sassa na mota, saka kayan galvannealed maimakon. Yana ba da ingantaccen fenti kai tsaye daga layin, yana rage farashin shirye-shiryen sinadarai.
Teburin Kwatancen Material
Siffar |
Standard Galvanized Karfe |
Galvannealed Karfe |
Abun ciki |
Zinc na waje Layer (Eta Layer) |
Zinc-iron gami saman Layer |
Bayyanar |
Mai sheki, sau da yawa yana fasalta spangle na bayyane |
Matte launin toka, irin nau'in rubutu |
Dangantakar Foda |
Yana buƙatar ƙwaƙƙwaran bayanin martabar share fage |
Na halitta micro-rough; mannewa mafi girma tushe |
Mafi kyawun Ga |
Abubuwan more rayuwa masu nauyi, buƙatun Layer na hadaya mai kauri |
Layukan sarrafa kai, samfuran fenti masu kyan gani |
5. Ƙimar Dillali: Yadda Ake Zabi Abokin Ciniki
Yin amfani da foda akan zinc yana buƙatar kayan aiki na musamman da zurfin ilimin fasaha. Tushen foda na gama-gari sukan lalata sassan da ba a daɗe ba saboda suna ɗaukar su kamar ƙaramin ƙarfe. Dole ne ku kimanta masu yuwuwar siyarwa kafin bayar da kwangila.
Yi tambayoyin QA masu mahimmanci yayin aikin tantancewar ku:
Shin suna da tanda da aka yi gasa kafin a gasa waɗanda za su iya kaiwa ga yanayin zafi da ake buƙata? Yawancin kananun shagunan kawai ba su da ƙarfin tanda don isa 30 ° C sama da daidaitaccen zafin magani.
Shin kayan aikin galvanizing da foda suna kasancewa tare ko haɗin gwiwa? Dabarun al'amura. Idan dillali dole ne ya tuka tulin tulin a duk faɗin jihar, ƙila za su yi hasarar madaidaicin tagar rufin sa'o'i 12.
Shin suna amfani da ƙwararrun matakan hana fitar da iskar gas? Masu siyar da inganci suna amfani da filaye na musamman yayin da ƙarfe ke da zafi. Wannan yana rufe pores kafin gashin launi na ƙarshe ya ci gaba.
Kula da jajayen tutoci nan take. Idan dillali ya ba da shawarar za su iya sutura sabon ƙarfe mai galvanized nan da nan ba tare da share fashe ba, tafiya. Idan sun yi da'awar thermal degassing ne wani ba dole ba ne karin kudin, nemo wani abokin tarayya. Gajerun hanyoyin hanya koyaushe suna kaiwa ga kwasfa.
Kammalawa
Rufe foda a kan galvanized karfe yana haifar da ingantaccen tsarin duplex, amma ya kasance wani tsari mara gafartawa. Ba za ku iya yin watsi da kimiyyar lissafi na faɗaɗa gas ko sinadarai na zinc mai amsawa ba. Ketare shirye-shiryen saman ba makawa yana haifar da gazawar kyan gani da kuma kariyar lalata.
Ɗauki matakai na gaba masu dacewa da aiki don ayyukanku masu zuwa:
Kulle ASTM D7803 da SSPC-SP 16 buƙatun shirye-shirye kai tsaye cikin Buƙatunku na Ba da shawarwari (RFPs).
Bukatar da aka rubuta tabbatacciyar hanyar yin gasa kafin gasa na awa 1 daga wanda kuka zaɓa.
Tabbatar da gaskiya, sadarwa ta ainihi tsakanin galvanizer mai zafi da foda don tabbatar da taga aikace-aikacen sa'o'i 12 ya cika.
Tabbatar cewa duk fashewar fashewar yana amfani da ƙananan taurin abrasives don kare mahimmancin shingen zinc.
FAQ
Q: Shin foda mai rufi galvanized karfe tsatsa?
A: Yana da matukar juriya ga tsatsa. Tsatsa yawanci yana faruwa ne kawai idan rufin ya yi zurfi sosai ya wuce duka shingen da Layer na zinc. Hakanan zai iya faruwa idan ci gaba da bayyanar da matsanancin yanayin zafi da ya wuce 250°C (480°F) ya sa zinc ɗin da ke cikin ƙasa ya gaza.
Q: Za ku iya foda gashi a kan tsofaffi, weathered galvanized karfe?
A: Ee, amma yana buƙatar tsaftace sinadarai mai nauyi. Dole ne a cire cikakken zinc hydroxides da carbonates (patina mai launin toka) ta amfani da ƙwararrun alkaline ko mafita na acid kafin ƙarfen ya kasance amintacce kuma a gasa shi.
Tambaya: Menene zai faru idan kun tsallake tsarin gasa kafin yin gasa?
A: Gas da aka kama da danshi za su saki da ƙarfi yayin maganin foda na ƙarshe. Wannan yana haifar da rarrabuwar rubutu, ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun fitilun fitilun da ake gani. Wadannan ramukan suna ba da damar danshi don ketare shingen foda gaba daya, yana cin nasara akan manufar tsarin duplex.
