'Yan kwangila galibi suna kallon fentin zinc a matsayin babban caca. Kullum kuna jin labaran masana'antu game da bala'i bazuwar da gazawar mannewa da ke faruwa a cikin watanni na kammala aikin. Ana iya fahimtar shakka gaba ɗaya. Duk da haka, gaskiyar ta bayyana a fili: a, zaka iya samun nasarar fenti shi. A cikin aikace-aikacen kasuwanci da masana'antu, ƙwararru suna kiran wannan tsari 'Tsarin Duplex.'
Rikicin ya yi yawa. Lokacin da kuka aiwatar da shi daidai, fenti da galvanizing suna haifar da ingantaccen tsarin tsaro na aiki tare. Lokacin da kuka aiwatar da shi ba da kyau ba - sau da yawa ta hanyar dogaro da daidaitaccen yashi na inji da na al'ada - yana ɓata kasafin kuɗin ku kawai kuma yana haɓaka lalatawar gida. Fentin ku zai zame da gaske daga karfe.
Mun tsara wannan jagorar don kawar da zato. Manufarmu ita ce samar da ƴan kwangila, ƙayyadaddun bayanai, da ƙungiyoyin sayayya tare da gaskiyar sinadarai marasa daidaituwa. Za ku koyi ainihin matakan shirye-shiryen da ake buƙata, gami da mahimman ka'idojin ASTM. Hakanan zaku gano dabarun zaɓin shafi da ake buƙata don tabbatar da tabbataccen tabbaci, mara aibi, da ƙarewa mai dorewa.
Key Takeaways
Adhesion yana dogara ne akan sinadarai na saman, ba kawai rashin ƙarfi ba: Daidaitaccen yashi na inji yakan lalata layin zinc ba tare da tabbatar da riko da fenti ba.
Shekaru yana ƙayyadad da tsari: Sabbin galvanized, ɗan yanayin yanayi, da cikakken yanayin tutiya yana buƙatar ƙa'idodin shirye-shirye daban-daban.
Kada a taɓa amfani da alkyd ko abubuwan da ke tushen mai: Suna amsawa tare da zinc (saponification), suna jujjuya ƙirar farko zuwa layin sabulu mai zamewa, wanda ke haifar da kwasfa.
Yi kimanta hanyoyin da wuri: Don ingantattun majalisu masu saurin jujjuyawar zafi, manyan abubuwan da ke da wadatar zinc akan karafa na iya ba da mafi kyawun ROI fiye da galvanizing mai zafi (HDG) da fenti.
Shari'ar Kasuwanci don 'Tsarin Duplex'
Dole ne mu fara ayyana Tsarin Duplex don fahimtar ƙimar sa. Yana da dabarun hade da zafi-tsoma galvanized (HDG) shafi da wani musamman ruwa ko foda topcoat. Don cimma wannan daidai, dole ne gabaɗayan tsarin ya ci gaba da bin ƙa'idar ASTM D6386. Wannan ma'auni yana sarrafa shirye-shiryen tukwane na zinc don zanen.
Babban fa'idar wannan tsarin yana cikin sakamakon haɗin kai. Fim ɗin fenti na waje yana aiki azaman shamaki. Yana kare abin da ke ciki na zinc daga amfani da wuri wanda gurbataccen yanayi ke haifarwa. A sakamakon haka, tushen zinc yana ba da babbar kariya ta cathodic. Idan fenti ya taso ko ya gouged, zinc yana aiki azaman anode na hadaya. Yana hana fashewar tsatsa a ƙarƙashin fim, yana tabbatar da lalacewa ya kasance a cikin gida.
Wannan tsarin tsaro na Layer Layer yana tsawaita tsawon rai sosai. Jimlar rayuwar sabis na tsarin duplex yawanci shine sau 1.5 zuwa 2.5 jimlar adadin rayuwar mutum ɗaya na zinc da fenti kaɗai. Ba kawai ka sami matakan kariya guda biyu ba; kuna samun sakamako mai yawa.
Wannan dabarar tana amfani da aikace-aikacen scalability da yawa. Kuna iya kula da ƙarfe mai nauyi bayan kerawa don filin wasa na waje. Akasin haka, zaku iya amfani da fentin da aka riga aka yi galvanized karfe nada da galvanized karfe takardar kayan don high girma na gine-gine masana'antu. Mahimman sinadarai da ka'idodin kariya sun kasance iri ɗaya ba tare da la'akari da sigar kayan aiki ba.
Tantance Yanayin Rufe: Matakai 3 na Yanayi
Tsarin kimanta saman ku yana nuna nasara ko gazawa. Tsarin shirye-shiryen ya dogara gaba ɗaya akan tsawon lokacin da Karfe Galvanized zuwa yanayi. An fallasa Ba za ku iya kula da tsohon zinc da sabon zinc iri ɗaya ba.
Sabbin Galvanized (0 zuwa 48 hours)
A cikin wannan taga na farko, yanayin ƙarfe yana da santsi sosai kuma yana haskakawa sosai. Kusan babu sinadarin zinc da ya samo asali a saman tukuna. Ƙarfe ɗin gaba ɗaya ba ya lalacewa. Domin ba shi da rubutu, fenti ba shi da wani abin da zai kama. Aiki ya zama wajibi. Filayen yana buƙatar tsaftataccen tsaftacewa da ingantaccen sinadarai ko bayanan injiniya. Dole ne ku kwatankwacin saman don ƙirƙirar maki na anga ƙananan ƙananan don mannewa.
Wani Sashe na Yanayi (Kwana 2 zuwa Shekara 1) - Matsayin Haɗari Mafi Girma
Wannan shine mataki mafi haɗari don aikace-aikacen shafa. A cikin waɗannan watanni, yanayin saman yana canzawa da sauri. Ya zama an rufe shi da tukwane da zinc oxides da zinc hydroxides. Sau da yawa kuna ganin wannan a matsayin farar tsatsa ta foda akan karfe. Waɗannan sinadarai masu kwance suna tsoma baki tare da manne fenti. Idan ka yi fenti a kansu, fentin ya manne da foda, kuma foda yana janye daga karfe. Aiki yana buƙatar tsaftacewa mai tsauri da bayanin martaba. Dole ne ku cire gaba ɗaya waɗannan ma'ajin alli kafin amfani da kowane nau'i na al'ada.
Cikakken Yanayi (Shekara 1+)
Bayan shekara guda na fallasa, ƙarfe ya daidaita. Yanayin saman yana canzawa yayin da yake ɗaukar carbon dioxide daga iska. Yana samar da zinc carbonate. Wannan wani fili ne mai mannewa, wanda ba shi da ruwa. Zinc carbonate haƙiƙa yana da kyau kwarai, ta halitta m substrate ga fenti. Mataki a nan yana buƙatar taka tsantsan. Kuna buƙatar tsaftacewa mai laushi kawai ta amfani da ruwan dumi da mai ragewa mai laushi. Yana da mahimmanci kada ku cire Layer carbonate na zinc yayin tsaftacewa.
Matsayin yanayi |
Lokaci |
Yanayin saman |
Ayyukan da ake buƙata |
Sabon Galvanized |
0 zuwa 48 hours |
Santsi, mai sheki, mara fa'ida |
Tsabtace sosai; shafa sinadaran ko inji etching. |
Wani Sashi Mai Wuyi |
Kwanaki 2 zuwa Shekara 1 |
Farin tsatsa na foda (zinc oxides/hydroxides) |
Cire duk abubuwan da aka sako-sako da bayanan martaba. |
Cikakken Yanayi |
Shekara 1+ |
Stable zinc carbonate Layer |
M rage ragewa kawai; kiyaye zinc carbonate. |
Shirye-shiryen Fasa: Rage Hadarin Kasawa
Ko da kun gano daidai lokacin yanayin yanayi, mummunan kisa yayin shirye-shiryen zai lalata tsarin duplex. Dole ne ku bi tsauraran ka'idoji don rage haɗarin gazawa.
Rage Hatsari (Gwajin Chromate)
Kayan aiki galibi suna tsoma sabon ƙarfe da aka haƙa a cikin baho na chromate. Waɗannan ma'aikatan wucewa suna hana rigar ajiya tabo yayin jigilar kaya. Duk da haka, chromates suna ƙunshe da fenti. Dole ne koyaushe ku gwada ma'aikatan wucewa ta amfani da ka'idar ASTM B201. Idan gwajin ya nuna chromates, ba za ku iya fentin karfe nan da nan ba. chromates dole ne ta dabi'a ta nisa, ko kuma dole ne ku cire su da ƙarfi ta hanyar bayanan injiniya.
Ka'idojin Tsaftacewa
Kafin yin roughing sama, dole ne a cire duk datti, mai, da gurɓataccen yanayi. Bi waɗannan matakan da aka binne don ingantaccen tsaftacewa:
Aiwatar da maganin tsabtace alkaline ko acidic (yawanci diluted 25:1) zuwa saman.
Yi amfani da goga mai laushi mai laushi don tayar da ƙazantattun ƙwayoyin cuta.
Kurkura saman sosai da ruwa mai tsafta don kawar da abubuwan tsaftacewa.
Bada ƙarfe ya bushe gaba ɗaya kafin a ci gaba zuwa matakin bayanin martaba.
Don sabbin filaye masu ɗorewa, wani farin vinegar na masana'antu yana goge ƙasa zai iya samar da ingantaccen tasiri, ƙanƙara mai ƙarancin acid yayin cire mai mai haske a lokaci guda.
Bayanan Bayani (Kirƙirar Tsarin Anchor)
Fenti yana buƙatar ƙananan kwari da kololuwa don kulle su. Muna kiran wannan ƙirar anga. Kuna da wasu hanyoyi don cimma wannan ba tare da lalata karfe ba.
Sweep Blasting (SSPC-SP 16): Wannan shine ma'auni na masana'antu don bayanan injiniya. Dole ne ku yi amfani da dabarar fashewar ƙananan kusurwa. Rike bututun ƙarfe tsakanin digiri 30 zuwa 60. Yi amfani da abin sha mai ƙarancin ƙarfi. Abrasive dole ne matsayi a taurin Mohs na 5 ko ƙananan (kamar goro, masara, ko takamaiman yashi na ma'adinai). Rike girman barbashi tsakanin 200 da 500 microns.
Haɗarin Ƙarfafawa: Dole ne ku guje wa daidaitattun yashi-digiri 90 a kowane farashi. Daidaitaccen fashewar zazzagewa zai cire tutiya mai laushi gaba ɗaya. Wannan yana lalata kariyar anode ta hadaya, yana mai da dukkan tsarin galvanizing mara amfani. Idan fashewar fashewa yana jin haɗari sosai ga ma'aikatan filin ku, tsoho zuwa hanyoyin sinadarai.
Wash Primers/Acrylic Pretreatment: Waɗannan su ne nau'ikan acidic da aka tsara don canza yanayin tashin hankali na tutiya ta hanyar sinadarai. Suna tilasta zinc don karɓar fenti ba tare da buƙatar wani ɓarna ba. Wannan yana kawar da haɗarin wuce gona da iri gaba ɗaya.
Zaɓin Rufe: Chemistry Wanda Ainihin Tsaya
Shirye-shiryenku na iya zama mara aibi, amma yin amfani da sinadarai mara kyau har yanzu zai haifar da gazawar bala'i. Zinc karfe ne na alkaline, kuma yana maida martani da karfi tare da wasu nau'ikan fenti.
Dokokin Cardinal (Abin da za a Guji)
Dole ne ku haramta tsayayyen fenti na tushen alkyd da madaidaitan tushen mai. Lokacin da zinc ya ci karo da resins na alkyd, wani nau'in sinadari wanda ba a iya sarrafa shi yana faruwa. Wannan ana kiransa saponification. Zinc na alkaline yana amsawa tare da mai don ƙirƙirar sabulu na zahiri a ƙarƙashin fim ɗin fenti. Da zarar saponification ya faru, suturar za ta kwashe a cikin manyan, zanen gado masu sassauƙa. Wannan yana bada garantin gabaɗayan gazawar sutura.
Amintattun Tsarukan Farko
Dole ne ku ƙididdige filaye a bayyane waɗanda aka tsara don mu'amala da zinc. Masana'antar ta gane nau'ikan farko guda biyu.
Ƙwararren Ƙwararren Ƙwararren Kai: Waɗannan an ƙirƙira su ne musamman don filaye masu zafi na galvanized. Sun dace da ƙayyadaddun bayanai kamar SSPC Paint 27. Suna cizon ƙarfe da sinadarai.
Ƙarfe na Ƙarfe na Ƙarfe: Ƙaƙwalwar acrylic masu inganci masu inganci suna nuna kyakkyawan mannewa akan tsabtace zinc da kyau. Suna kasancewa masu sassauƙa kuma suna tsayayya da saponification gaba ɗaya.
Topcoats masu inganci
Da zarar kun fara firamare, kuna buƙatar ƙwanƙarar rigar saman don jure cin zarafin muhalli. Muna ba da shawarar fenti na acrylic latex na Direct-To-Metal (DTM) ko DTM acrylic enamels don yawancin aikace-aikacen gine-gine na waje.
Don mahalli masu ban tsoro, dole ne ku haɓaka ƙayyadaddun bayanan ku. Yi la'akari da manyan cibiyoyin ruwa na chlorine. Daidaitaccen suturar foda na polyester suna kasawa da sauri lokacin da aka fallasa su zuwa tururi na cikin gida. A cikin waɗannan al'amuran, ƙididdige fenti-mataki ɗaya na masana'antu. Waɗannan ƙwararrun fenti na masana'antu suna ƙetare buƙatun keɓancewar etching saboda suna haɗin kemikal kai tsaye zuwa Layer zinc.
Rufi Category |
Misalai / Nau'i |
Hukunci na Duplex Systems |
Abubuwan da aka haramta |
Alkyd enamels, daidaitattun kayan aikin mai |
Gujewa Tsaye. Yana haifar da saponification (samuwar sabulu) da kwasfa baki ɗaya. |
Amintattun Maɗaukaki |
SSPC Paint 27, acrylic karfe primers, wash primers |
Nasiha sosai. Yana ba da tsayayyen mannewar sinadarai ba tare da mayar da martani mara kyau ba. |
Ideal Topcoats |
DTM acrylic latex, DTM enamels, masana'antu mataki daya-mataki fenti |
Nasiha sosai. Yana samar da shinge mai dorewa, mai sassauƙa, mai jure yanayi. |
Hujja: Lokacin Tsallake Galvanizing + Paint
Dole ne mu magance ainihin aiwatarwa mai mahimmanci. Galvanizing mai zafi mai zafi wanda ke biye da zanen abu ne mai ban sha'awa mai rikitarwa, tsarin ciniki da yawa. Yana ɗaukar babban gefe don kuskure. Wani lokaci, tsarin duplex shine zaɓi mara kyau don aikin ku.
Haƙiƙanin Aiwatarwa & Kula da Inganci
Kera da kyar ke tafiya daidai. gyare-gyaren filin yana buƙatar walda a kan wurin. Welding nan take yana lalata Layer HDG. Lokacin da ƴan kwangila suka gyara waɗannan walda a cikin filin tare da sanyin zinc, gyaran ya yi ƙasa da ƙanƙan da masana'anta mai zafi mai tsomawa. Kuna ƙirƙirar hanyar haɗi mai rauni a cikin sarkar hana lalata.
Hadarin Karyawar Thermal
Dole ne ku kuma yi la'akari da tsananin zafin wanka na galvanizing. Haɗaɗɗen gine-ginen ƙarfe ko madaidaicin tsarin gine-ginen ƙarfe suna da sauƙin kamuwa da yaƙe-yaƙe da murdiya yayin aikin tsomawa. Idan ƙirar gine-ginen ku na buƙatar ainihin haƙuri, dole ne ku tuntuɓi jagororin ASTM A384 don murɗawar thermal. Sau da yawa, haɗarin zafi yana da girma sosai.
Alternative na Farko Mai Girma
Yi la'akari da buƙatun shirye-shiryen saman saman saman saman ku na ƙarshe. Wasu manyan riguna masu daraja na ruwa ko na masana'antu suna buƙatar bayanin martabar 'Kusa da Farin fashewa' don mannewa da kyau. Idan ka harba saman da aka yi da galvanized zuwa ma'auni na Kusa-Fara, wannan fashewar fashewar za ta lalata layin zinc gaba daya. Za ku lalata jarin ku zuwa ƙura.
Ra'ayin Yanke shawara
A cikin madaidaicin yanayin yanayi, ko a cikin manyan aikace-aikacen masana'antu masu buƙatar bayyana fa'ida mai ƙarfi, yana da matukar amfani a tsallake galvanizing mai zafi gaba ɗaya. Aiwatar da firikwensin arziƙin zinc kai tsaye zuwa ƙarfe mara kyau da ya fashe. Bi wannan tare da babban ƙoƙon saman ku. Za ku sami kwatankwacin tsawon rai, kawar da haɗarin gurɓataccen zafi, da sauƙaƙe sarkar samar da ku.
Kammalawa
Zanen tukwane na zinc yana da matukar tasiri, amma tsarin yana da matukar rashin haƙuri ga gajerun hanyoyi. Nasarar ku ta ta'allaka ne gaba ɗaya akan aiwatar da ingantaccen kimanta yanayin yanayi, aiwatar da ingantacciyar dabarar bayanin martaba, da kuma guje wa resin da ba su dace ba kamar alkyds.
Kafin ka ƙaddamar da aikin na gaba, ɗauki mataki don kare ƙayyadaddun bayanan ku. Ba da shawara ga ƙungiyoyin sayayya da injiniyoyi don bincikar ayyukan masu kaya da ƙarfi. Tabbatar sun tabbatar da cikakken yarda da ASTM D6386 don shirye-shiryen saman da SSPC-SP 16 don share fashe. Ta hanyar neman bin waɗannan ƙa'idodi, kuna canza ƙoƙarin zane mai haɗari zuwa tsarin tsinkaya, mai dorewa sosai.
FAQ
Q: Za a iya fenti madaidaiciya a kan galvanized karfe?
A: A'a. Ba a shirya ba, sabbin filayen galvanized suna da santsi sosai kuma suna amsawa da sinadarai don daidaitaccen mannewar fenti. Dole ne ku tsaftace ƙarfen sosai, ku yi bayanin shi ta amfani da etch sinadari ko ƙaramar ƙaramar fashewar matsi, sannan a fara fara amfani da ƙwararren ƙarfe na musamman.
Tambaya: Wane nau'in fenti ne zai manne wa karfe galvanized?
A: Ya kamata ka yi amfani da Direct-To-Metal (DTM) acrylic latex paints, acrylic enamels, ko masana'antu na musamman fenti mataki daya da aka tsara don zinc. Kada ku taɓa amfani da fenti na alkyd ko mai, saboda za su haifar da saponification kuma babu makawa bawo.
Tambaya: Ta yaya zan fenti karfen galvanized mai tsatsa (weathered)?
A: Idan kun ga 'farar tsatsa' (zinc oxide), dole ne ku cire shi sosai ta hanyar tsaftacewa da kuma lalata. Idan ka ga tsatsa ja, karfen da ke ciki yana fallasa. Dole ne ku yi gyaran tsatsa na al'ada kuma ku yi amfani da faci mai arzikin zinc kafin cikar rufe saman.
Tambaya: Ina bukatan firamare na musamman don galvanized karfe nada?
A: iya. Coils sukan ƙunshi jiyya na wucewa kamar chromates ko mirgina mai da ake shafa a masana'anta. Dole ne ku fara cire waɗannan matakan kariya ta hanyar sinadarai da farko. Bayan haka, dole ne ka yi amfani da abin da ya dace da kai ko acrylic na ƙarfe kafin yin amfani da rigar saman ka ta ƙarshe.
