Iikontraka zihlala zijonga i-zinc epeyintiweyo njengomdlalo omkhulu wokungcakaza. Uhlala usiva amabali emizi-mveliso malunga nentlekele yokuxobuka kunye nokusilela kokuncamathela okwenzekayo kwiinyanga zokugqitywa kweprojekthi. Ukuthandabuza kuyaqondakala ngokupheleleyo. Nangona kunjalo, inyaniso icacile: ewe, unokuyipeyinta ngempumelelo. Kwizicelo zorhwebo kunye nezoshishino, iingcali zibiza le nkqubo 'Duplex System.'
Imiba iphezulu. Xa uyenza ngokuchanekileyo, ipeyinti kunye nokugalela kwenza indlela yokukhusela ehambelana kakhulu. Xa uyenza kakubi-kaninzi ngokuthembela kwisanti esemgangathweni kunye ne-epoxies eqhelekileyo-ichitha nje uhlahlo lwabiwo-mali lwakho kwaye ikhawulezisa ukubola kwendawo. Ipeyinti yakho iya kutyibilika kwintsimbi.
Siyile esi sikhokelo ukuphelisa umsebenzi wokuqagela. Injongo yethu kukuxhobisa iikontraka, abacacisi, kunye namaqela okuthengwa kweempahla neenkonzo ngezinto zokwenyani zekhemikhali ezingagqwethwanga. Uya kufunda eyona migangatho yokulungiselela efunekayo, kubandakanywa iiprothokholi ze-ASTM ezibalulekileyo. Uya kufumana kwakhona ingqiqo yokukhetha ukugquma okuyimfuneko ukuze uqinisekise ukuqinisekiswa, okungenasiphako, kunye nokugqitywa okuhlala ixesha elide.
Izinto eziphambili zokuThatha
Ukuncamathela kuxhomekeke kwikhemikhali yomphezulu, hayi nje uburhabaxa: Ukusantiya kwesanti ngoomatshini kudla ngokubeka esichengeni umaleko we-zinc ngaphandle kokuqinisekisa ukubambelela kwepeyinti.
Ubudala buyalela inkqubo: Isanda kugalelwa, ifakwe izulu kancinci, kunye ne-zinc egcwele imozulu ifuna iiprothokholi zamalungiselelo ezahluke ngokupheleleyo.
Ungaze usebenzise i-alkyd okanye i-oyile-based primers: Basabela nge-zinc (i-saponification), ukuguqula i-primer interface ibe ngumaleko wesepha emtyibilizi, ekhokelela kwi-peeling iyonke.
Vavanya ezinye iindlela kwangethuba: Kwiindibano ezichane kakhulu ezithanda ukugqwethwa kwe-thermal, iiprimers ezityebileyo ze-zinc ezisebenza kakhulu kwintsimbi engenanto zinokubonelela nge-ROI engcono kune-hot-dip galvanizing (HDG) kunye nepeyinti.
I-Business Case ye-'Duplex System'
Kufuneka siqale sichaze iDuplex System ukuze siqonde ixabiso layo. Lulwelo olucwangcisiweyo lwengubo yolwelo okanye umgubo ongaphezulu wedyasi. Ukufezekisa oku ngokuchanekileyo, yonke inkqubo kufuneka ihlale ihambelana ngokungqongqo nomgangatho we-ASTM D6386. Lo mgangatho ulawula ukulungiswa kwendawo ye-zinc yokupenda.
Inzuzo engundoqo yale nkqubo ilele kwisiphumo sayo sokusebenzisana. Ifilimu yepeyinti yangaphandle isebenza njengomqobo. Ikhusela i-zinc coating ephantsi ekusetyenzisweni kwangaphambili okubangelwa zingcoliseko ze-atmospheric. Ukubuyisela, i-zinc engaphantsi inika ukhuseleko olukhulu lwe-cathodic. Ukuba ipeyinti ikrwelwa okanye igutyungelwe, i-zinc isebenza njenge-anode yombingelelo. Ikhusela i-rust creepage engaphantsi kwefilimu, iqinisekisa ukuba umonakalo uhlala usekhaya.
Le ndlela yokukhusela imigangatho emibini yandisa ubomi obude kakhulu. Ubomi benkonzo bubonke benkqubo ye-duplex ngokuqhelekileyo yi-1.5 ukuya kwi-2.5 amaxesha obuninzi bobomi bomntu ngamnye we-zinc kunye nepeyinti yodwa. Awufumani nje imigangatho emibini yokhuseleko; ufumana isiphumo sokuphindaphinda.
Le ngqiqo isebenza kuzo zonke izicelo ezininzi zokukala. Usenokuphatha intsimbi enzima emva kokwenziwa kwebala lezemidlalo langaphandle. Ngakolunye uhlangothi, unokusebenzisa ipeyinti yangaphambili ikhoyili yentsimbi ekhandiweyo kunye izinto ezenziwe ngentsimbi ekhandiweyo kwimveliso yezakhiwo ezinomthamo ophezulu. I-chemistry ephantsi kunye nemigaqo yokukhusela ihlala ifana kungakhathaliseki ukuba yiyiphi ifomathi yezinto.
UVavanyo lweMeko yokuNgquma: Amanqanaba ama-3 okuBuka kweMozulu
Isakhelo sakho sovavanyo lomphezulu simisela impumelelo okanye ukusilela. Iprotocol yokulungiselela ixhomekeke ngokupheleleyo kwithuba elide kangakanani Intsimbi yeGalvanized iye yavezwa emoyeni. Awukwazi ukuphatha i-zinc endala kunye ne-zinc entsha ngendlela efanayo.
Isandula ukuvuthwa (iiyure ezi-0 ukuya kwezingama-48)
Kule festile yokuqala, imeko yentsimbi igudileyo kakhulu kwaye ibonakalisa kakhulu. Phantse akukho khompawundi zinc zenziwe kumphezulu okwangoku. Intsimbi ayinayo i-porous ngokupheleleyo. Ngenxa yokuba ayinayo ukuthungwa, ipeyinti ayinanto yokubambelela kuyo. Isenzo sinyanzelekile. Umphezulu ufuna ukucocwa ngokucokisekileyo kunye nokunyanzeliswa kweekhemikhali okanye iprofayili yomatshini. Kuya kufuneka uvale umphezulu ukuze wenze iindawo ze-ankile ezincinci zokuncamathela.
Imo yezulu ngokuyinxenye (Iintsuku ezi-2 ukuya kuNyaka o-1) – Elona nqanaba loMngcipheko liphezulu
Eli lelona nqanaba liyingozi kakhulu kwizicelo zokugquma. Ngezi nyanga, imeko yendawo iguquka ngokukhawuleza. Igqunywa kwii-zinc oxides ezinamathele ngokukhululekileyo kunye ne-zinc hydroxides. Uhlala ubona oku njengomgubo omhlophe we-powdery rust kwintsimbi. Ezi zixhobo ezikhululekile ziphazamisa kakhulu ukunamathela kwepeyinti. Ukuba upende phezu kwabo, ipeyinti inamathela kwipowder, kwaye ipowder ikhupha kwintsimbi. Intshukumo ifuna ukucocwa okungqongqo kunye neprofayili. Kufuneka uzisuse ngokupheleleyo ezi diphozithi ezitshikisiweyo phambi kokufaka nayiphi na iprimer.
Imo yezulu ngokupheleleyo (Unyaka om-1+)
Emva konyaka wokuvezwa, isinyithi siyazinza. Imeko yomphezulu iyaguquka njengoko ifunxa ikharbon diokside emoyeni. Yenza i-zinc carbonate. Le yikhompawundi ebambelele ngokuqinileyo, enganyibilikiyo ngamanzi. I-Zinc carbonate yeyona nto ibalaseleyo, erhabaxa ngokwendalo kwipeyinti. Inyathelo apha lifuna ukulumka. Ufuna kuphela ukucocwa kancinci usebenzisa amanzi ashushu kunye ne-degreaser ethambileyo. Kubalulekile ukuba ungayisusi i-zinc carbonate layer ngexesha lokucoca.
Inqanaba leMozulu |
Ixesha elibekiwe |
Imeko yoMphezulu |
Inyathelo elifunekayo |
Isanda kuGalvanized |
0 ukuya kwiiyure ezingama-48 |
Igudile, imenyezela, ayinaporeshi |
Coca ngokucokisekileyo; sebenzisa ikhemikhali okanye i-etching yomatshini. |
Imo yezulu Kancinane |
Iintsuku ezi-2 ukuya kuNyaka o-1 |
Irust emhlophe engumgubo (i-zinc oxides/hydroxides) |
Susa ngokungqongqo zonke iikhompawundi kunye neprofayili. |
Imo yezulu ngokupheleleyo |
1 Unyaka+ |
I-zinc carbonate layer ezinzileyo |
Ukususa igrisi kancinci kuphela; gcina i-zinc carbonate. |
Ukulungiswa komphezulu: Ukunciphisa iiNgozi zokuSilela
Nokuba uchonge ngokuchanekileyo inqanaba lemozulu, ukuphunyezwa okulambathayo ngexesha lolungiselelo kuya konakalisa inkqubo ye-duplex. Kufuneka ulandele iiprothokholi ezingqongqo ukunciphisa imingcipheko yokusilela.
Ukunciphisa umngcipheko (uVavanyo lweChromate)
Izibonelelo zihlala zisithi nkxu intsimbi esandula ukwenziwa kwiibhafu zekhromati. Ezi arhente zokudlula zithintela ibala lokugcina elimanzi ngexesha lokuhambisa. Nangona kunjalo, iichromates ziyayigxotha ipeyinti. Kufuneka usoloko uvavanya iiarhente zokupasa usebenzisa i-ASTM B201 protocol. Ukuba uvavanyo lubonisa iichromates, awukwazi ukupeyinta isinyithi ngokukhawuleza. Iichromates kufuneka imozulu ihambe ngokwendalo, okanye kufuneka uzisuse ngogonyamelo ngokusebenzisa iprofayile ngoomatshini.
IiProtokholi zokucoca
Ngaphambi kokuba urhawuze umphezulu, kufuneka ususe konke ukungcola, ioli, kunye nezingcolisi eziphilayo. Landela la manyathelo alandelelanayo ukucoca ngeyona ndlela:
Faka isisombululo sokucoca i-alkaline okanye i-acidic (ngokuqhelekileyo i-diluted 25: 1) phezulu.
Sebenzisa ibhrashi ethambileyo yebristle ukuphazamisa ungcoliseko lwendalo olunenkani.
Hlanza umphezulu ngokucokisekileyo ngamanzi acocekileyo, acocekileyo ukuze unciphise izinto zokucoca.
Vumela isinyithi ukuba some ngokupheleleyo ngaphambi kokuba uqhubele phambili kwinqanaba leprofayili.
Kwimigangatho emitsha yeshiti, ukosula kweviniga emhlophe yeshishini kunokubonelela nge-asidi esebenzayo, ethambileyo ngelixa ngaxeshanye isusa ioyile ezikhanyayo.
Ukwenziwa kweProfayili (Ukwenza iPatheni yeAkile)
Ipeyinti idinga iintlambo ezincinci kunye neencopho zokutshixa. Le nto siyibiza ngokuba yipateni ye-ankile. Uneendlela ezimbalwa zokufezekisa oku ngaphandle kokutshabalalisa isinyithi.
I-Sweep Blasting (SSPC-SP 16): Lo ngumgangatho woshishino wokwenza iprofayili ngoomatshini. Kufuneka usebenzise ubuchule bokudubula obuphantsi. Bamba umlomo phakathi kwama-30 kunye nama-60 degrees. Sebenzisa i-abrasive enobulukhuni obuphantsi. I-abrasive kufuneka ibekwe kwinqanaba lobunzima be-Mohs ye-5 okanye ngaphantsi (njengamaqokobhe e-walnut, ama-corncobs, okanye isanti ethile yamaminerali). Gcina ubukhulu bamasuntswana phakathi kwe-200 kunye ne-500 microns.
UMngcipheko wokuQhuba ngokuPheleleyo: Kufuneka uphephe ukuqhushumba kwesanti okuqhelekileyo okungama-90 kuzo zonke iindleko. Ukuqhuma okusemgangathweni kuya kuhluba i-zinc ethambileyo ngokupheleleyo. Oku kutshabalalisa ukukhuselwa kwe-anode yedini, ukunika yonke inkqubo ye-galvanizing ingenamsebenzi. Ukuba uqhushumbo lokutshayela luziva lusemngciphekweni kakhulu kubasebenzi bakho basendle, ukusilela kwiindlela zemichiza.
Hlamba iiPrimers / Acrylic Pretreatment: Ezi zizixube ezineasidi eziyilelwe ukuguqula ngokwekhemikhali ukuxinezeleka komphezulu we-zinc. Banyanzela i-zinc ukuba yamkele ipeyinti ngaphandle kokufuna nayiphi na i-abrasion yomatshini. Oku kuphelisa umngcipheko wokuqhuma ngokupheleleyo.
UKhetho lweCoating: Ikhemistri Encamathelayo ngokwenene
Ukulungiselela kwakho kusenokungabi nasiphako, kodwa ukusebenzisa ikhemistri engalunganga kusaza kubangela ukusilela kwintlekele. I-Zinc yintsimbi ye-alkaline, kwaye isabela ngobundlobongela kunye neendlela ezithile zepeyinti.
Umthetho weKhadinali (Yintoni emayiNxwenywe)
Kuya kufuneka uthintele ngokungqongqo iipeyinti ezisekwe kwi-alkyd kunye ne-primers esekwe kwi-oyile. Xa i-zinc idibana ne-alkyd resins, ukusabela kweekhemikhali okungalawulekiyo kwenzeka. Oku kwaziwa ngokuba yi-saponification. I-alkaline zinc idibana neeoyile ukwenza umaleko wokoqobo wesepha phantsi kwefilimu yepeyinti. Emva kokuba i-saponification isenzeka, i-coating iya kukhupha kumaphepha amakhulu, aguquguqukayo. Oku kuqinisekisa ukusilela ngokupheleleyo kokugquma.
Iinkqubo ezivunyiweyo zePrimer
Kufuneka ukhankanye iiprimers ezilungiselelwe ngokucacileyo ujongano ne-zinc. Ishishini lithathela ingqalelo iindidi ezimbini eziphambili.
IiPrimers eziziKhethekileyo zokuSelf-Etching: Ezi zenzelwe ngokukodwa imigangatho eshushu yokuntywila. Zihambelana neenkcukacha ezifana ne-SSPC Paint 27. Ziluma kwisinyithi ngokwekhemikhali.
I-Acrylic Metal Primes: Iiprimer ze-acrylic ezikumgangatho ophezulu ezifumaneka emanzini zibonisa ukunamathela okugqwesileyo kwi-zinc ecocwe ngokufanelekileyo. Bahlala bebhetyebhetye kwaye bayaxhathisa i-saponification ngokupheleleyo.
Iingubo eziphezulu zokuSebenza
Nje ukuba uqalise umhlaba, udinga i-topcoat eyomeleleyo ukumelana nokuxhatshazwa kokusingqongileyo. Sincoma i-Direct-To-Metal (i-DTM) yepeyinti ye-acrylic latex okanye i-DTM acrylic enamels kwizicelo ezininzi zezakhiwo zangaphandle.
Kwiindawo ezinobundlongondlongo, kufuneka uphucule iinkcukacha zakho. Qwalasela amaziko asemanzini aneklorine ephezulu. Iidyasi zomgubo zepolyester ezisemgangathweni zisilela ngokukhawuleza xa zivezwe kumphunga wangaphakathi wamanzi. Kwezi meko, cacisa ipeyinti yenqanaba elinye leshishini. Ezi peyinti ezikhethekileyo zemizi-mveliso zidlula imfuneko yee-primer etching ezihlukeneyo ngenxa yokuba zibophene ngokwekhemikhali ngokuthe ngqo kumaleko we-zinc.
Category Coating |
Imizekelo / Iintlobo |
Isigwebo seDuplex Systems |
Ulwakhiwo oluNgavumelekanga |
I-alkyd enamels, iiprimers eziqhelekileyo ezisekelwe kwioli |
Kuphephe Ngokungqongqo. Ibangela i-saponification (ukubunjwa kwesepha) kunye ne-peeling iyonke. |
Ii-Primers ezivunyiweyo |
Ipeyinti ye-SSPC 27, iiprimer zetsimbi ze-acrylic, iiprimers zokuhlamba |
Kucetyiswa kakhulu. Inika ukubambelela kweekhemikhali ezizinzileyo ngaphandle kokuphendula kakubi. |
Topcoats efanelekileyo |
I-DTM ye-acrylic latex, ii-enamel ze-DTM, iipeyinti ze-zinc zeshishini elinye |
Kucetyiswa kakhulu. Yenza umqobo ohlala ixesha elide, obhetyebhetye, okwaziyo ukumelana nemozulu. |
I-Counter-Argument: Uza Kutsiba nini iGalvanizing + Peyinta
Kufuneka sijongane neyona nyaniso ibalulekileyo yophumezo. Ukufakela igalvanizing eshushu elandelwa yipeyinti yinkqubo entsonkothileyo, yorhwebo oluninzi. Ithwele umda ophezulu ngokuphawulekayo wempazamo. Ngamanye amaxesha, inkqubo ye-duplex lukhetho olungalunganga lweprojekthi yakho.
Ukuphunyezwa kweeNyaniso kunye noLawulo loMgangatho
Imveliso ayifane ihambe ngokugqibeleleyo. Uhlengahlengiso lwendawo lufuna ukuwelda kwisiza. Ukuwelda ngoko nangoko kutshabalalisa umaleko we-HDG. Xa iikontraka zilungisa ezi welds ebaleni ngesitshizi se-zinc ebandayo, ukulungiswa kungaphantsi kakhulu kune-galvanizing ye-factory-dip eshushu. Udala ikhonkco elibuthathaka kwikhonkco lakho lokuchasa ukubola.
Umngcipheko wokuPhathwa kweThermal
Kufuneka kwakhona uqwalasele ukushisa okukhulu kwebhafu yegalvanizing. Ulwakhiwo lwentsimbi oluntsonkothileyo okanye oluchaneke kakhulu luchaphazeleka ngokukodwa kwi-warpage kunye nokugqwetheka ngexesha lenkqubo yokudipha. Ukuba uyilo lwakho loyilo lufuna unyamezelo oluchanekileyo, kuya kufuneka ujonge izikhokelo ze-ASTM A384 zokuphazamiseka kwe-thermal. Ngokuqhelekileyo, umngcipheko wobushushu uphezulu kakhulu.
Enye indlela yePrimer eSebenza ngokuPhezulu
Qwalasela iimfuno zolungiselelo lomphezulu wedyasi yakho yokugqibela. Ezinye iidyasi ezikumgangatho ophezulu zaselwandle okanye kwimizi-mveliso zifuna iprofayile 'yokuNdubuleka okuMhlophe' ngokuncamathela okufanelekileyo. Ukuba uqhushumba umphezulu owenziwe ngezinki ukuya kumgangatho okufuphi-Mhlophe, oko kuqhushumba kuhlasela kuya kutshabalalisa umaleko we-zinc ngokupheleleyo. Uya kutshabalalisa utyalo-mali lwakho lube luthuli.
Ingqiqo yesigqibo
Kwiimeko ezichaneke kakhulu, okanye kwimizi-mveliso enzima efuna iprofayile yoqhushumbo olumandla, kuyasebenza kakhulu ukutsiba igalvanizing yediphu eshushu ngokupheleleyo. Faka isicelo se-primer zinc-rich-rich primer ngokuthe ngqo kwintsimbi evuthwe ngokufanelekileyo. Landela oku ngedyasi yakho ephezulu yokusebenza. Uya kufezekisa ubomi obude obuthelekisekayo, uphelise umngcipheko wokuphazamiseka kwe-thermal, kwaye wenze lula kakhulu ikhonkco lakho lokubonelela.
Ukuqukumbela
Ukupeyinta imiphezulu ye-zinc kusebenza kakhulu, kodwa inkqubo ayinyamezeli iindlela ezimfutshane. Impumelelo yakho ixhomekeke ngokupheleleyo ekwenzeni uvavanyo lwemozulu oluchanekileyo, ukwenza ubuchule obuchanekileyo bokwenza iprofayili, kwaye uthintele ngokungqongqo ii-resin ezingahambelaniyo njenge-alkyds.
Ngaphambi kokuba uqalise iprojekthi yakho elandelayo, thatha inyathelo ukukhusela iinkcukacha zakho. Cebisa amaqela akho okuthenga kunye nobunjineli ukuba aphicothe ngokungqongqo ukuhamba komsebenzi wababoneleli. Qinisekisa ukuba bayaqinisekisa ukuthotyelwa ngokupheleleyo kwe-ASTM D6386 yokulungiswa komphezulu kunye ne-SSPC-SP 16 yokuqhushumba. Ngokufuna ukubambelela kule migangatho, uguqula umzamo wokupeyinta onobungozi ube yinkqubo enokuthenjwa, eyomelele kakhulu.
FAQ
Umbuzo: Ngaba unokupeyinta ngokuthe ngqo phezu kwentsimbi eyenziwe ngamagalvanized?
A: Hayi. Ayilungiswanga, imigangatho emitsha efakwe igalvan igudile kakhulu kwaye iyasebenza ngokwekhemikhali ukuba incamathele kwipeyinti eqhelekileyo. Kufuneka uhlambulule ngokucokisekileyo isinyithi, uyifake iphrofayili usebenzisa i-etch yekhemikhali okanye i-low-pressure blast blast, kwaye usebenzise i-primer yentsimbi ekhethekileyo kuqala.
Umbuzo: Loluphi uhlobo lwepeyinti oluya kubambelela kwisinyithi esinezinki?
A: Kufuneka usebenzise iipeyinti ze-acrylic latex ze-acrylic, i-acrylic enamels, okanye iipeyinti ezikhethekileyo zoshishino ezinenyathelo elinye ezenzelwe izinki. Ungaze usebenzise i-alkyd okanye ipeyinti esekwe kwi-oyile, njengoko ziya kubangela i-saponification kwaye ngokuqinisekileyo i-peel.
Umbuzo: Ndiyipeyinta njani intsimbi erulileyo (efakwe kwimozulu)?
A: Ukuba ubona 'umhlwa omhlophe' (i-zinc oxide), kufuneka uyisuse ngokucokisekileyo ngokucoca okunamandla kunye nokunciphisa amafutha. Ukuba ubona i-rust ebomvu, intsimbi engaphantsi ibonakaliswe. Kuya kufuneka wenze ukulungiswa komhlwa kwaye usebenzise i-patch primer enezinki ngaphambi kokuba ugqume ngokupheleleyo umphezulu.
Umbuzo: Ngaba ndifuna i-primer ekhethekileyo yekhoyili yentsimbi?
A: Ewe. Iikhoyili zihlala zibonakalisa unyango lwe-passivation olufana neechromates okanye ii-oyile eziqengqelekayo ezifakwe kumzi-mveliso. Kufuneka uqale ususe le maleko yokhuselo ngekhemikhali. Emva koko, kuya kufuneka ufake i-self-etching okanye i-acrylic-based metal primer ngaphambi kokufaka i-topcoat yakho yokugqibela.
