Uhlalutyo lwenkqubo yokulungiswa komphezulu we-galvanized steel grating ngaphambi kokupenda
I-Hot-dip galvanizing (i-hot-dip galvanizing ngokufutshane) kumphezulu we-steel grating iyona nto ixhaphakileyo kwaye isebenzayo iteknoloji yokukhusela indawo yokulawula ukubola kokusingqongileyo kwamalungu ensimbi. Kwimekobume ye-atmospheric ngokubanzi, i-hot-dip galvanizing coating efunyenwe yile teknoloji inokukhusela iinxalenye zentsimbi ekugqumeni iminyaka emininzi okanye ngaphezulu kweminyaka eyi-10. Kwiinxalenye ezingenazo iimfuno ezikhethekileyo zokunqanda ukubola, akukho mfuneko yonyango lwesibini lwe-anti-corrosion (ukutshiza okanye ukupeyinta). Nangona kunjalo, ukuze kugcinwe iindleko zokusebenza kwezixhobo kunye nezibonelelo, ukunciphisa ukugcinwa, kunye nokwandisa ngakumbi ubomi benkonzo ye-grating yensimbi kwiindawo ezinzima, kudla ngokuyimfuneko ukwenza ukhuseleko lwesibini kwi-grating yensimbi eshushu-diphu, oko kukuthi, ukusebenzisa i-summer organic coating kwi-hot-dip surface galvanized ukuze yenze inkqubo yokulwa ne-corrosion kabini.
Ngokwesiqhelo, iigrayiti zentsimbi zihlala zigqithiswa kwi-intanethi ngoko nangoko emva kokuntywila kushushu. Ngexesha lenkqubo yokudlula, i-oxidation reaction yenzeke kumphezulu we-hot-dip galvanizing coating kunye ne-interface yesisombululo se-passivation, isenza ifilimu ye-passivation eshinyeneyo kwaye ibambelele ngokuqinileyo kumphezulu we-hot-dip galvanizing layer, edlala indima ekwandiseni ukuxhathisa ukubola kwe-zinc layer. Nangona kunjalo, kwi-gratings yentsimbi efunekayo ukuba ifakwe kwi-primer yasehlotyeni ukwenza inkqubo yokulwa ne-corrosion ephindwe kabini yokukhusela, ifilimu eshinyeneyo, egudileyo, kunye ne-passive ye-metal passivation kunzima ukudibanisa ngokuqinileyo kunye ne-primer yasehlotyeni elandelayo, okubangelwa ukugquma kwangaphambi kwexesha kunye nokuchithwa kwe-organic coating ngexesha lenkonzo, echaphazela umphumo wayo wokukhusela.
Ukuze kuphuculwe ngakumbi ukuqina kweentsimbi zetsimbi eziphathwe nge-galvanizing eshushu-dip, ngokuqhelekileyo kunokwenzeka ukugqoka i-coating organic coating efanelekileyo kumphezulu wayo ukwenza inkqubo yokukhusela edibeneyo yokukhusela. Ngenxa yokuba umphezulu we-hot-dip galvanized layer of the grating grating is flat, smooth, and bell-shaped, the bonding amandla phakathi kwayo kunye nenkqubo yokugquma elandelayo ayanelanga, enokuthi ikhokelela ngokulula kwi-bubbling, ukuchithwa, kunye nokusilela kwangaphambi kwexesha lokugquma. Ngokukhetha i-primer efanelekileyo okanye inkqubo efanelekileyo yokulungiswa kwangaphambili, amandla okubambisana phakathi kwe-zinc coating / primer coating inokuphuculwa, kwaye isiphumo sokukhusela ixesha elide lenkqubo yokukhusela edibeneyo inokwenziwa.
Itekhnoloji engundoqo echaphazela isiphumo sokukhusela sentsimbi eshushu-diphu efakwe kwi-galvanized grating surface protective coating system nayo yonyango lomphezulu ngaphambi kokugquma. I-Sandblasting yenye yezona ndlela zixhaphakileyo nezithembekileyo zokunyanga umphezulu wokugquma intsimbi, kodwa ngenxa yokuba umphezulu we-galvanized dip oshushu uthambile, uxinzelelo olugqithisileyo lokuqhushumba kwesanti kunye nobungakanani bamasuntswana esanti kunokubangela ilahleko yomaleko wegalvanized of the grating yentsimbi. Ngokulawula uxinzelelo lokutshiza kunye nobungakanani besanti yesanti, i-sandblasting ephakathi kwi-hot-dip galvanized steel grating yindlela esebenzayo yonyango yomphezulu, enempembelelo eyanelisayo ekuboniseni i-primer, kunye namandla okudibanisa phakathi kwayo kunye ne-hot-dip galvanized layer ingaphezulu kwe-5MPa.
Ukusebenzisa i-cyclic hydrogen primer ene-zinc phosphate, ukunamathela phakathi kwe-zinc coating / organic primer ngokusisiseko kukhulu kune-5MPa ngaphandle kwesanti. Kumphezulu we-hot-dip galvanized steel grating, xa kungenakulungele ukusebenzisa unyango lwe-sandblasting surface, xa i-coating eyongezelelweyo yezinto eziphilayo iqwalaselwa kamva, i-primer equkethe i-phosphate inokukhethwa, kuba i-phosphate kwi-primer inceda ekuphuculeni ukunamathela kwefilimu yepeyinti kunye nokuphucula umphumo wokuchasana nokubola.
Ngaphambi kokuba i-primer isetyenziswe kulwakhiwo lokugubungela, i-hot-dip galvanized layer ye-steel grating is passivated or not passivated. I-pretreatment ayinayo impembelelo ebalulekileyo ekuphuculeni ukunamathela, kwaye ukusula utywala akukho mphumo wokuphucula ngokucacileyo kumandla okudibanisa phakathi kwe-zinc coating / primer.
