Ngatichekei kudzingirira: kana iwe uchifunga kuti akajairwa emagetsi gaskets ndeye yakavimbika kwenguva refu gadziriso yekupfapfaidza munyu, kufumurwa kwemakemikari, kana hunyoro hwepamusoro, unenge urikuzvigadzirira kutadza kwemunda kunodhura. Mubvunzo chaiwo hausi wekuzviputira pachawo, asi nezve chaiyo yekutadza modes inoregeredzwa kusvika yanyanya kunonoka.

Kusavimbika Kwakashata muMicron-Thin Layer

Ndakaona izvi kakawanda. Iyo spec inodaidzira galvanizing, uye electrogalvanizing inowana kudzungudza nekuti yakachipa uye inotaridzika zvakanaka kubva pasherufu-yakanaka uye inopenya. Iko fungidziro ndeye yese zinc, saka inofanirwa kupa chengetedzo yakafanana. Ndiwo musungo wekutanga. Electrogalvanizing inonyanya kuita electrolytic process iyo inoisa mutete, kunyange layer, kazhinji kutenderedza 5-10 microns. Yakanakira kutaridzika uye inopa yakadzikama base dziviriro kubva pakuoma kwemuchadenga corrosion. Asi mune chokwadi nharaunda yakaoma- funga mapuratifomu emahombekombe egungwa, mitsara yekugadzira makemikari, kana kutakurwa kwemakina munzvimbo dze de-icing - chivimbo ichocho chinoputika nekukurumidza. Iyo layer yakangotetepa zvakanyanya kuti ipe chibayiro cheanode chiitiko kana chakanganiswa.

Iko kukundikana hakuwanzotanga se general rusting. Kazhinji inzvimbo yepitting kurwisa. Kukwenya panguva yekumisikidza, micro-crack kubva pakuumbwa, kana kunyange kumucheto uko iyo yekupfekedza inogara yakatetepa inova nzvimbo yekutanga. Mukupisa-dip galvanizing, iyo yakakora coating uye iron-zinc alloy layers inogona kuramba ichidzivirira simbi pakatanga. Muzvikamu zve electrogalvanized, kuputsa kunosvika pasimbi yepasi pakarepo. Kubva ipapo, pasi pefirimu corrosion inokambaira, uye zingi haigone kuchengetedza nekuzvipira nzvimbo yakakura nekuti hapana huwandu hwakakwana hwezinc. Iwe unopedzisira waita ngura kubuda ropa kubva pasi peiyo ichiri-yakasimba-yakatarisa zinc layer, inova inotyisa yekuongorora.

Takaita bvunzo padivi-ne-padivi makore kumashure, kwete kunyange nesainzi, tichingoturika masampuli pafenzi padhuze negwenzi rekuchenesa mvura. Iyo inopisa-dip samples yakaratidza chena ngura (zinc oxide) mushure memwedzi mitanhatu asi pasina ngura tsvuku. The Electrollvaned gasket samples? Vakatanga kuratidza nzvimbo dzvuku dzendara pamakomba ebhaudhi uye vakacheka micheto mukati memazuva makumi mapfumbamwe. Pakasvika mwedzi wechi8, ngura yakanga yapararira. Iyo yakatetepa, yakapfeka yunifomu muvengi wayo pachayo-hapana kuwedzera ukobvu pamapendero asina njodzi.

Iko Electrogalvanized Inogona Kusimudza (Uye Kwaisingazoiti)

Hakusi kuparara kwese uye kusuruvara. Kune nzvimbo dzakadzorwa uko electrogalvanizing yakakwana uye inodhura-inoshanda. Zvishandiso zvemukati zvine hunyoro, hunyoro hwakadzikama, kana mumagungano akavharirwa kubva mumhepo (semukati memamwe mavhavha emagetsi ane gasketed seals). Chinokosha kusavapo kwehunyoro hunoramba huripo kana hukasha hwemakemikari. Ini ndakazvitsanangudza yemukati yekubatanidza zvimiro musherufu yekuchengetera, semuenzaniso. Zvakanaka.

Iwo mhedziso-asingaende nzvimbo chero anosanganisira chlorides, anogara achinyorova-kuoma kutenderera, kana acidic/alkaline fumes. Ndinoyeuka purojekiti inobatanidza ductwork mufekitari yekugadzira chikafu ine yakapfava acidic condensate. Injiniya yakataura electrogalvanized flat gaskets kune ese maflange. Vaitarisa zvakakwana panguva yekuisa. Mukati megore, takanga tave nekudonha pamajoini akawanda. Magasi akange aita ngura zvekusvika pakurasikirwa nesimba rekusunga nekusimbisa kuvimbika. Iyo corrosion chigadzirwa (ngura) zvakare yakagara yakawanda vhoriyamu, iyo inogona ne theoretically kuwedzera bolt mutoro, asi muchokwadi, yakangopwanya yakaderedzwa gasket zvinhu. Kugadzirisa kwaive kuvharika kwakazara uye kutsiva ne316 simbi isina tsvina gaskets-chidzidzo chinorwadza mumutengo wakaiswa wakakwana.

Chimwe chinhu chinowanzo kuregererwa ndeye galvanic kuenderana. Pair an Electrollvaned gasket nesimbi isina tsvina flange uye bhaudhi munzvimbo ine mvura, uye iwe wakagadzira bhatiri. Iyo zinc (anodic) ichaora zvakanyanya kuchengetedza iyo isina tsvina (cathodic). Izvi zvinogona kukurumidzira kudyiwa kweiyo zinc layer yakatetepa pamwero unotyisa. Mukugadzirisa kwakadai, iwe unogona kunge uri nani kune yakajeka kabhoni simbi gasket uye uchivimba nestainless's passivation, kana zviri nani zvakadaro, inoenderana nezvose. Iyo poindi ndeyekuti, iyo gasket haigone kusarudzwa iri yega.

Maonero eMutengesi uye Zvinhu Zvechokwadi

Kutaura nevagadziri kunojekesa zvipingamupinyi zvinoshanda. Kune yakakwirira-vhoriyamu, yakajairwa zvikamu, electrogalvanizing ndimambo nekuda kwekumhanya, mutengo, uye zvekushongedza kupera. Kambani yakadai Handan Zitai Fastener Kugadzira Co, Ltd., yakavakirwa muChina's hombe fastener yekugadzira hub muYongnian, Hebei, inogona kumhanya makuru mabheji emagaskets akajairwa kuburikidza nemitsetse yemagetsi zvinobudirira. Nzvimbo yavo iri padyo nemigwagwa mikuru yekufambisa seBeijing-Guangzhou Railway uye National Highway 107 mukana wekupa zvinhu izvi zvisingadhure, zvemhando yepamusoro pasi rose. Iwe unogona kutarisa yavo yakajairwa zvinopihwa pane yavo saiti pa https://www.zitafornasteers.com. Kwavari, inzira yakajairika inosangana nechikamu chikuru chezvido zvemusika.

Nekudaro, kana iwe ukarovera pasi mune zvinodiwa zvehunyanzvi zvehutsinye sevhisi, hurukuro inochinja. Iwo vatengesi vakafanana vanowanzokurudzira kusimuka kubva kune yakachena electrogalvanized kune yakakosha maapplication. Vanogona kupa mazano ekurapa kwepashure senge chromate kushandura coatings (yero, bhuruu, kana kujeka) iyo inowedzera dhizaini yekupokana nekupodza iyo zinc pamusoro. Izvi zvinobatsira kunonoka kutanga kwekuchena uye, kusvika pamwero muduku, tsvuku tsvuku. Asi iko kunonoka, kwete shanduko yakakosha kune ukobvu hwejasi kana kugona kwechibayiro. Kune imwe mutengo wakawedzera, zinc-flake coatings (seGeomet kana Delta Protekt) inopa kushanda kwepamusoro-soro, sezvo ivo vachivaka yakakora, yakawanda inodzivirira-inodzivirira layer iyo ine zvakare aluminium flakes. Asi ikozvino iwe uri kusiya nzvimbo yekuchipa yezvigadzirwa zvekusimbisa.

The takeaway? Iyo yekugovera cheni yakagadziridzwa kune mwero. Kutsanangudza nharaunda dzakakasharara zvinoreva kuti iwe unofanirwa kushingaira kusaruta chiyero uye kazhinji kuita mune yakakosha kurongeka, iyo inokanganisa yekutungamira nguva uye mutengo. Iko kutengeserana-off mapurojekiti mazhinji anotadza muchikamu cheinjiniya kukosha.

Case in Point: Retrofit Yakatidzidzisa Zvakawanda Kupfuura Kukundikana Kwekutanga

Taive nebasa rekudzorera papombi dzepanze mune imwe nzvimbo yepetrochemical. Iwo ekutanga gaskets aive plain carbon steel, uye aive akaita ngura akasimba kumaflange, achida kuti mwenje ubvise. Mabvi-gerk reaction yaive yekusimudzira kune electrogalvanized kudzivirira iyo inonamira. Takadaro. Makore maviri gare gare, panguva yekuchinja, takawana ma gaskets matsva akanga asina kunamatira, asi akanga akaora zvakanyanya, nekurasikirwa kukuru. Nzvimbo dzekuvharira dzakange dzakakombama uye dzisina kuenzana.

Mamiriro ezvinhu aiuraya combo: inopindirana mupfuhwira (kupisa nehunyoro), ambient sulfur compounds mumhepo, uye munyu wemahombekombe. Iyo electrogalvanized coating yakanga yapera kare. Iyo post-mortem kuongororwa yakagumisa kuti iyo yakaonda zinc layer yakapedzwa nekukurumidza mugore rekutanga. Simbi yepasi yakasara yakabva yaita ngura pamwero wekukurumidza, zvichida nekuda kwekutanga galvanic chiitiko uye nharaunda ine hukasha. Kukwidziridzwa kwacho kwakatipa pfungwa yenhema yekuchengetedzeka uye kwakatungamira kune yakanyanyisa kuvharwa chisimbiso kupfuura dai takashandisa yakakora, yakatsiga jasi kubva pakutanga, kana chimwe chinhu chakasiyana zvachose.

Kukundikana ikoko kwakatisundidzira kutsanangura inopisa-dip galvanized (nekutarisira kwakakodzera kwedimensional kushivirira uye madrips) kana zinc-flake yemasevhisi ane hutsinye akadaro. Panyaya dzakanyanya kuoma, takasvetuka simbi yakavharwa nekabhoni zvachose uye takatamira kune aruminiyamu kana simbi isina gaskets, kunyangwe mutengo wakakwira. Mutengo wakakwana wekuvuza kana kuvharwa zvisina kurongwa unoderedza mutengo wezvinhu zvegasket.

Zvinoshanda Kutora uye Kutsanangura neMeso Akavhurika

Saka, mutongo uri papi electrogalvanized gasket durability? Iine zvimiro hongu, ine zvinorema caveats. Iwe unofanirwa kutsanangura hasha zvakanyanya. Iri apo neapo condensation, kana kuti yakananga spray? Iyo pH isina kwayakarerekera, kana zvishoma kure? Chii chinonzi tembiricha kutenderera? Aya madeti ane basa kupfuura iro rakafara label.

Mutemo wangu wakakasharara wechigunwe izvozvi: Kana nharaunda ichiora zvekuda rinopfuura basa rependi pane zvakatenderedza zvivakwa zvesimbi, ipapo magetsi ega ega pane yakakosha yekuisa chisimbiso ibheja. Funga seyekushongedza kana kupfava kwekudzivirira kupedzisa, kwete yakasimba yekudzivirira ngura system. Nguva dzose funga nezvemigumisiro yekukundikana. A gasket kutadza pane yekupinda panhizha inogumbura. Iro gasket rimwechete rinokundikana pamutsetse wemafuta ane simba guru injodzi.

Pakupedzisira, nyora nharaunda mune yako spec. Usangonyora galvanized. Rondedzera maitiro (electrogalvanized per ASTM B633, Type I, Fe/Zn 5), uye kana zvichibvira, inoda chromate conversion coating (Type II) kuti iwedzere kuramba. Kana, zvirinani zvakadaro, tsanangura iyo inodiwa munyu yekupfapfaidza maawa ekutadza (semuenzaniso, ASTM B117). Maawa 96 asina ngura tsvuku yakasiyana zvikuru nemaawa 500. Izvi zvinomanikidza kutaura kwakanyanyisa nemutengesi wako, angave ari mugadziri muhombe senge ambotaurwa Handan Zitai kana muparidzi wepano. Inofambisa nhaurirano kubva kune zvigadzirwa kuenda kune yakagadziridzwa chikamu, izvo chaizvo izvo gasket munzvimbo ine hutsinye inofanira kunge iri.