Iinjineli kunye nabakhi badumisa ngokubanzi Intsimbi yeGalvanized ngenxa yokuziphilisa, idini le-zinc coating. Lo mqobo uchukumisayo wesinyithi usebenza njengokhuselo oluphambili kumhlwa. Nangona kunjalo, ayikhuselekanga ngokupheleleyo ekuthotyweni. Ubume bemichiza enobundlongondlongo kunye neemeko ezishushu ezigqithisileyo zinokudiliza lo maleko okhuselayo ngokukhawuleza.
Abaninzi abenzi bezigqibo bajongana nengxaki efihlakeleyo entsimini. Ukulungiswa komphezulu okungalunganga, ukugqithiswa okungahambelaniyo, okanye iindlela zokulungisa ezingafanelekanga zinokukhupha ngokusebenzayo i-zinc layer. Xa oku kusenzeka, ukhawulezisa umhlwa kunokuba uwuthintele. Kuya kufuneka uqonde i-chemistry ethambileyo ye-zinc ukunqanda ukusilela kweprojekthi eyintlekele.
Eli nqaku libonelela ngesakhelo esingqongqo sokuvavanya iingubo ezikhuselayo. Siza kuseka iiprothokholi zogcino ezicacileyo kwiziko lakho. Uya kufunda kwakhona ukwenza ukulungiswa komphezulu womgangatho weshishini wezinto ezikrwada ezifana ne Ishiti lentsimbi ekhandisiweyo kunye nezixhobo ezenziweyo ezenziweyo.
Izinto eziphambili zokuThatha
I-patina ye-zinc yokukhusela idinga iinyanga ezi-6 ukuya kwezi-24 kwimozulu epheleleyo; ukugquma i-zinc engenaweather ngaphandle kokulungiselela okukhethekileyo kuqinisekisa ukusilela kokuncamathela.
Iimeko ezingqongileyo ezigqithisileyo (kufuphi ne-100 ° C + nokufuma okuphezulu) kunokubangela 'ukuguqulwa kwepolarity,' okubangela ukuba i-zinc ikhawuleze-kunokuthintela-intsimbi ye-corrosion.
Ukucoca okuqhelekileyo kufuneka kusebenze ngokungqongqo ngaphakathi kuluhlu lwe-pH lwe-6 ukuya ku-12; imvula eneasidi okanye ibleach yealkaline iya kunyibilikisa i-zinc layer.
Ukukrazuka koomatshini (okufana nokubrasha ucingo okanye ukugalela ngaphezulu kwesanti) kususa umaleko we-zinc osebenzayo, obangela i-atmospheric oxidation ekhawulezileyo.
I-industrial overcoating ifuna ukuthotyelwa okungqongqo kwimigangatho yokutshayela (SSPC-SP 16) kunye nokuqinisekiswa ngovavanyo lwechromate (ASTM B 201).
Isiseko: Ukuqonda ukuthotywa kunye 'ukuBuyiswa kwePolarity'
Awukwazi ukukhusela i-metallic substrate ngaphandle kokuqonda i-chemistry yayo esisiseko. Izibophelelo zeekhemikhali ze-zinc eziqhelekileyo zinemida eyahlukileyo. Kufuneka sichonge le mida ukwenza isicwangciso esifanelekileyo sokukhusela.
Indlela yokuZiphilisa
I-Zinc isebenza njenge-anode yombingelelo. Kwi-electro-chemical reaction, i-zinc ibeka phambili i-oxidation yayo. Inika ngokukhawuleza ii-electron zayo ukukhusela i-core steel core. Ukuba umntu ukrwela umphezulu, i-zinc ejikelezileyo iya kusabela ukuvala ulwaphulo. Oku ngokomzimba kunye ne-electrochemically ikhusela intsimbi esengozini ngaphantsi.
Imida yokusiNgqongileyo (Xa iZinc isilela)
Ngaphandle kokuqina kwayo, le ndlela ye-anode yedini inemida engqongqo yokusingqongileyo. Ukuwela le miqobo kuphazamisa izinto ngokukhawuleza.
Ukwaphulwa kwe-pH: I-Zinc idinga indawo ye-pH ezinzileyo. Ukonakala ngokukhawuleza ngaphandle kwefestile ye-pH ekhuselekileyo ye-6 ukuya kwi-12. Ungcoliseko olunzima lwemizi-mveliso kudala imvula eneasidi, yehla amanqanaba e-pH okusingqongileyo ukuya kwi-4 okanye ngaphantsi. Ngokwahlukileyo, iikhemikhali zokucoca i-alkaline ezinobunzima zidlula i-pH 12. Zombini ezigqithisileyo zichitha umqobo wokukhusela.
I-Galvanic Corrosion: Ukudibana ngokuthe ngqo komzimba phakathi kweentsimbi ezingafaniyo kuyonakalisa kakhulu. Ukuba ubeka isinyithi esingaphantsi, njengobhedu okanye ubhedu, ngokuchasene ne-zinc layer, ibangela ukusetyenziswa kwe-electro-chemicals ngokukhawuleza. I-zinc izinikela ngokupheleleyo ukukhusela ubhedu olusondeleyo, ishiya intsimbi engaphantsi ingenanto ngokupheleleyo.
I-Polarity Reversal Phenomenon
Ubushushu kunye nokufuma zazisa imowudi yokusilela eyingozi kakhulu eyaziwa ngokuba yi-polarity reversal. Oku ngokuqhelekileyo kwenzeka kwiindawo ezinobushushu obuphezulu obusondela kwi-100 ° C kunye nokufuma okuphezulu. Iindawo zokuhlala zezolimo, iindawo zokucoca umphunga, kunye nemizi-mveliso eshushu yokwenziwa kwemizi-mveliso idla ngokuhlangabezana nale nto.
Ngaphantsi kwezi meko ezithile ze-thermal, i-surface chemistry iyatshintsha. I-zinc isabela kwi-zinc oxide (ZnO) kunye ne-zinc hydroxide (Zn (OH) ₂). Ezi zixhobo zitshintsha amandla ombane we-zinc layer ngokupheleleyo. I-zinc iguqula ibe yi-cathode, kwaye intsimbi engaphantsi iba yi-anode. Isixokelelwano sibaleka ngokusisiseko. Esikhundleni sokuzincama, i-zinc ikhawuleza ngokukhawuleza ukurusa kwentsimbi.
Isakhelo seSisombululo: Ukuphonononga iiNgqungquthela eziKhuselekileyo zeSekondari
Ngamanye amaxesha isiseko se-zinc layer sidinga ukuqiniswa kwesibini. Abathengi kufuneka bakhethe izisombululo ze-overcoat ezifanelekileyo ze i-coil yensimbi ene-galvanized okanye iphepha eligqityiweyo. Isigqibo sematriksi silandelayo sahlulahlula iindidi ezintathu zokugquma.
1. Iidyasi ezicacileyo (Ubuhle kunye nomsebenzi wokukhanya)
Imeko yokusetyenziswa: Iidyasi ezicacileyo zisebenza kakuhle xa ufuna ukugcina ubuhle bentsimbi yoqobo ngelixa usongeza i-UV kunye nokumelana ne-oxidation.
Iinqobo zoVavanyo:
Iglosi kunye nokuNgafihli: Khangela iimveliso ezichaza inqanaba leglosi elingaphezulu kwe-90. Oku kuqinisekisa ukuba iimfuno zokukhanya okuphezulu zihlala zibonakala. Imilinganiselo yeglosi esezantsi iya kwenza buthuntu ukugqiba kwesinyithi.
Ulwakhiwo: Kuya kufuneka ukhethe phakathi kweedyasi ze-High-Solids kunye needyasi zeTurbo ezomisa ngokukhawuleza. Iinketho ze-High-Solids zibonelela ngefilimu engqindilili kunye ne-low volatile organic compounds (VOC). Ngokuqhelekileyo bafuna ixesha lokunyanga iiyure ezingama-36 ukuya kwezingama-48. Iidyasi zeTurbo zomile ngokukhawuleza kodwa zibonelela ngokhuseleko oluncinci lomqobo.
Unyino: I-zinc entsha esebenza kakhulu ihlala isala iidyasi ezicacileyo ezisemgangathweni. Ngaphandle kwee-agent ezikhethekileyo zokubambisana, idyasi ecacileyo iya kukhupha nje kumaphepha amakhulu.
2. IiPolymer eziSebenza ngokuPhezulu kunye neeNgqungquthela zePolyester
Imeko yokusetyenziswa: Udinga ezi zogquma ngenxa yokufuma okugqithisileyo kunye nemimandla yobushushu. Ukuba ukuguqulwa kwe-polarity ngumngcipheko owaziwayo kwiziko lakho, iipeyinti eziqhelekileyo ziya kusilela.
Iikhrayitheriya zoVavanyo: Ipolymer okanye inkqubo yepolyester isebenza njengesithintelo esipheleleyo somzimba kunye ne-thermal. Inqumla ngokupheleleyo ukufuma kunye nokushisa okubangela. Ngokuhlukanisa isinyithi kwindawo ye-100 ° C, ugcina iimpawu zedini ze-zinc ngokukhuselekileyo.
3. IiNkqubo zePaint yeShishini kunye neZinc-Rich Primes
Imeko yokusetyenziswa: Khetha ezi zixokelelwano zokhuselo lwesakhiwo esinzima kwindawo yemizi-mveliso eyonakalisa kakhulu.
Iikhrayitheriya zoVavanyo: Ukuba iinkcukacha zeprojekthi zigunyazisa ukupeyinta, kufuneka usebenzise iiprimers ezityebileyo ze-zinc ngokuthe ngqo. Iipeyinti ezisemgangathweni zorhwebo azikho ikhemikhali yokubamba eyimfuneko kule substrate. Iipeyinti eziqhelekileyo ziya kukhupha ngokukhawuleza ngenxa ye-reactivity ephezulu ye-zinc.
Itshathi yokuthelekisa yoMtyalo weSekondari
Category Coating |
Ityala lokuSebenzisa eliPhambili |
Uncedo olungundoqo |
Umda obalulekileyo |
Iidyasi ezicacileyo |
Ukugcinwa kobuhle, ukusetyenziswa kwezakhiwo zangaphakathi |
Igcina inkangeleko yentsimbi, ukuxhathisa kwe-UV |
Ihlala ikhatywa yizinc entsha engafakwanga |
Polymer / Polyester |
Iindawo zokuhlala, iindawo zokuhlambela ezishushu |
Ikhusela ukuguqulwa kwe-thermal polarity |
Ifuna usetyenziso lwefektri oluchanekileyo |
Zinc-Rich Primes + Ipeyinti |
Ishishini elinzima, isakhelo sentsimbi yolwakhiwo |
Ubuninzi bomqobo womzimba kunye neekhemikhali |
Ifuna ulungiselelo lokutshayela ngokungqongqo |
ULungiselelo loMphezulu weShishini: I-Adhesion Bottleneck
Iprofayile yomphezulu engalunganga yeyona ndawo ixhaphakileyo yokusilela kwizicelo ze-B2B. Unokuthenga eyona nto ibiza kakhulu yokugquma ipolymer ekhoyo. Iya kusilela ukuba i-substrate ayinalungiselelo olufanelekileyo.
Ixesha lokuguga (Omtsha vs. Weathered)
Isinyithi esitsha siziphatha ngendlela eyahlukileyo kunesinyithi esidala. Izinto ezisanda kuveliswa ziqulethe ii-oxides eziphazamisayo. Abavelisi basoloko bethi nkxu intsimbi kwiibhafu zokucima ikhromathi ukunqanda ukuba buthuntu kwangoko. Kufuneka uvavanye lo maleko wechromate ungabonakaliyo usebenzisa umgangatho we-ASTM B 201. Ukuba ichromate ikhona, iipeyinti aziyi kuncamathela.
Sichaza imeko 'yemozulu' njengeyona meko ifanelekileyo yokwaleka. Kuthatha iinyanga ezi-6 ukuya kwezi-24 zokuvezwa kwangaphandle kumphezulu ukwenza i-zinc carbonate patina ezinzile. Le patina yendalo irhabaxa kancinane kwaye yamkela lula iicoats zesibini ngaphandle kokulungiswa koomatshini.
Ukunyamezelwa kweProfayili yoMphezulu (SSPC-SP 16)
Ukuba awukwazi ukulinda iinyanga ezingama-24 kwimozulu yendalo, kufuneka wenze iprofayile yomphezulu owenziweyo. Umgangatho we-SSPC-SP 16 uyalela ngokuthe ngqo ukutshayela imigqaliselo eyimfuneko kwimathiriyeli ephakathi kwemozulu.
IiParameters ze-Abrasive: Kufuneka usebenzise ngokungqongqo i-200 ukuya kwi-500 micron (i-8 ukuya kwi-20 mils) i-media abrasive. Oku kudala iincopho eziyimfuneko ze-microscopic kunye neentlambo zokubambelela kwi-primer.
Uthintelo loMngcipheko: Ukuqhushumba kwesanti ngendlela eqhelekileyo akuvumelekanga ngokungqongqo. Ukugqithisa ngokugqithiseleyo kuya kuhluba i-zinc layer ngokupheleleyo. Le ntlekele ibuyisela izinto ezixabisa kakhulu kwintsimbi engenanto. Abasebenzi kufuneka basebenzise intshukumo ekhawulezayo, yokubrasha ngexesha lokuqhushumba.
Isicelo sePrimer kwangoko
I-zinc eveziweyo, eneprofayili isabela ngeoksijini yendawo ngoko nangoko. Awunakushiya umqadi osanda kugqabhuka uhleli eyadini ngobusuku. Iprimer kufuneka isetyenziswe kwishifti efanayo yokusebenza. Nakuphi na ukulibaziseka kuvumela i-microscopic oxides ukuba ihlaziye, iyonakalisa iprofayile yokuncamathela osandula ukuyidala.
UMgaqo woLondolozo: uThintelo lweMichiza kunye noLwakhiwo loMzimba
Abaphathi bamaziko bafuna isikhokelo esicacileyo sokuSebenza noLondolozo (O&M). Ukunyamekelwa ngokufanelekileyo kwesiqhelo kuthintela ukungcola okunobundlobongela ekutyeni ngokusebenzisa umqobo we-zinc.
IiParameters zokucoca ezisemgangathweni
Ukuhlanjwa rhoqo kususa iityuwa ezidliwayo kunye nothuli lwamashishini. Nangona kunjalo, iindlela zokucoca ezinobundlobongela zibangela umonakalo osisigxina.
Imida yokuhlamba ngoxinzelelo: Nciphisa izixhobo zakho zokuhlamba uxinzelelo ukuya kuthi ga kwi-1450 psi. Ukugqithisa olu xinzelelo kubangela i-delamination yomzimba we-zinc patina.
UKhetho lwesicoci: Sebenzisa izicoci ezithambileyo nezingathathi hlangothi zepH ngokukodwa. I-American Galvanizers Association (AGA) incoma izisombululo ezilula ezifana ne-Simple Green® okanye iviniga emhlophe ehlanjululweyo. Ezi zisusa ngokukhuselekileyo ukukhanya kokukhanya ngaphandle kokuguqula i-chemistry yesinyithi.
ULungiso oluNgcolisekileyo oluJolisiweyo
Amabala ahlukeneyo amashishini afuna unyango oluthile lwekhemikhali. Hlala usebenzisa ezi zisombululo ngononophelo kwaye uhlambulule indawo ngokukhawuleza.
Amabala Amanzi kunye namabala athambileyo: Faka i-ammonia yasekhaya ehlanjululweyo ukuphakamisa ibala. Udinga ukuhlanjululwa kwamanzi kwangoko emva koko ukuze unciphise umphezulu.
I-Rust Runoff kunye ne-Cement Splatter: Xa intsimbi ekrwada ekufutshane ithontsiza umhlwa kwintsimbi yakho egqunyiweyo, sebenzisa izicoci ezisekwe kwi-oxalic acid. Ezi asidi zijolise kwi-iron oxides ngaphandle kokuhlasela ngokukrakra i-zinc.
Igraffiti: Susa ipeyinti engafunekiyo usebenzisa i-non-alkaline peyinti yokuthambisa. Gcoba i-thinner kwaye ukhuhle ipeyinti ngobumnene usebenzisa iplastiki okanye izikrazu zomthi. Ungaze usebenzise iimela ze-metal putty.
Umthetho 'Akukho Mvumbo weMechanical'.
Kufuneka uthintele ngokungqongqo iibrashi zocingo okanye iipads zesanti ezirhabaxa ngexesha lolondolozo. Abasebenzi bezogcino bakholisa ukwenza impazamo yokuba umhlwa omhlophe ube nobumdaka baze bazame ukuwukhuhla. Iibrasives zeMechanical 'azicoci' umphezulu. Bayisusa ngokusisigxina i-patina yokukhusela. Oku kuveza i-zinc entsha esebenza kakhulu emoyeni, iqinisekisa umjikelo okhawulezayo wokuthotywa.
Ukulungiswa ngokukhawuleza: Ukulungiswa kweMikrwelo kunye neNsimbi eveziweyo
Umonakalo obonakalayo ogcinwe ngexesha lokuhamba okanye ukufakwa kufuna iNkqubo yokuSebenza ePhambili (SOP) yokuphendula ngokukhawuleza. Forklifts krwempa imiqadi, kwaye abafakeli bawisa izixhobo.
Ifestile yokulungisa
I-gouges ye-Physical gouges engena nge-zinc ukuya kwi-substrate yensimbi ibeka ingozi enkulu. Kufuneka ulungise le mikrwelo inzulu ngoko nangoko. Ukuba ayiphathwanga, ukufuma kwe-ambient kuya kufikelela kwintsimbi engenanto. Umhlwa uya kuqalisa ukurhubuluza ngaphantsi kotyatyazo olujikelezileyo, nto leyo ebangela ukudakumba okubanzi.
I-Zinc Spray SOP (uLungiso lweMizuzu eli-15)
Ungalungisa umonakalo wendlela yokuhamba ngokukhawuleza usebenzisa le ndlela evavanyiweyo.
Inyathelo 1: Qinisekisa ukuba indawo yendawo yomile ngokupheleleyo. Sula nayiphi na ioyile yomatshini, iminwe, okanye uthuli lolwakhiwo usebenzisa ilaphu elingena-lint.
Inyathelo lesi-2: Sebenzisa ipeyinti yesitshizi enezinki eziphezulu. Izitshizi ze-zinc zorhwebo ziqulethe uthuli lwe-zinc oluncinci luxhonywe kwi-resin ebophelelayo. Olu qulunqo luxelisa ngokusondeleyo iimpawu zokuziphilisa kunye neziguquguqukayo zengubo yokuqala yefektri.
Inyathelo lesi-3: Galela isitshizi ngokulinganayo phezu kwegouge. Musa ukukhukulisa indawo. Vumela ixesha eliqhelekileyo lemizuzu eli-15 lokumisa phezu komhlaba phambi kokuphatha okanye ukufakela inxalenye ngokubhekele phaya.
Ukuqukumbela
Ukukhuselwa kwesiseko kuxhomekeke ngokusisiseko ekugcineni ibhalansi ye-pH efanelekileyo kunye nokuphepha ngokusebenzayo ukonakala koomatshini. Ukuqonda imida ye-substrate yakho yensimbi iqinisekisa ixesha elide kunye nokunyaniseka kwesakhiwo.
Sicebisa abenzi bezigqibo ukuba balungelelanise indlela yabo yokusebenza ngokusekelwe kokusingqongileyo. Kwiindawo eziqhelekileyo zangaphandle, vumela nje i-zinc carbonate patina yendalo ukuba yenze ixesha elide. Kumsebenzi obandakanya ubushushu obugqithisileyo kunye nokufuma, kufuneka uchaze imidibaniso yepolymer efakwe efektri ukuthintela ukuguqulwa kwepolarity. Ngokugquma kwemizi-mveliso enzima, gunyazisa ukubambelela ngokungqongqo kwimigangatho yokutshayela i-SSPC-SP 16 ukuqinisekisa ukusebenza kwexesha elide.
Thatha inyathelo ngaphambi kokuba ugqibezele iinkcukacha zoncedo lwakho. Thetha ngokuthe ngqo nomthengisi wakho wezinto eziphathekayo okanye umhloli we-NACE-certified coatings. Baza kukunceda ufanise i-alloy yakho ye-zinc kunye nemeko yayo yangoku yokuguga kunye nenkqubo echanekileyo ye-primer.
FAQ
Umbuzo: Ndingasebenzisa ibrashi yocingo ukususa umhlwa omhlophe kwintsimbi eyenziwe ngegalvanized?
A: Hayi. I-wire brushing itshabalalisa i-zinc carbonate layer ekhuselayo kwaye iveze i-zinc entsha, eya kuthi i-oxidize ngokukhawuleza kwaye ikhawuleze ukuthotywa. Sebenzisa iibhrashi zeplastiki eziqinileyo kuphela.
Umbuzo: Kutheni intsimbi yam epeyintiweyo ixobuka?
IMPENDULO: Ukucwecwa kwepeyinti ngokuqhelekileyo kubangelwa kukusebenzisa ipeyinti eqhelekileyo ngokuthe ngqo kwi-zinc engenaweather okanye ukusilela ukususa unyango lwechromate olufakwe efektri. I-primer enezinc kunye nokuqhushumba okufanelekileyo kuyafuneka.
Umbuzo: Ngaba intsimbi efakwe isinyithi irusila ngokukhawuleza kubushushu obuphezulu?
A: Ewe. Kwiindawo ezikufutshane ne-100°C kudityaniswe nokufuma okuphezulu, 'i-polarity reversal' kwenzeka apho i-zinc ikhawulezisa ukurusa kwentsimbi engaphantsi endaweni yokuyikhusela.
