Ukuhlaziywa kwenqubo yokwelashwa okungaphezulu kwegridi yensimbi ngaphambi kokupenda

Ukuhlaziywa kwenqubo yokwelashwa okungaphezulu kwegridi yensimbi ngaphambi kokupenda

I-hot-dip galvanizing (i-hot-dip galvanizing kafushane) phezu kwe-steel grating ubuchwepheshe obuvame kakhulu futhi obusebenzayo bokuvikela indawo yokulawula ukugqwala kwemvelo kwezingxenye zensimbi. Ngokujwayelekile imvelo yomoya, i-hot-dip galvanizing coating etholwe yilobu buchwepheshe ingavikela izingxenye zensimbi ekugqwaleni iminyaka eminingana noma ngaphezulu kweminyaka eyi-10. Ezingxenyeni ezingenazo izidingo ezikhethekile zokulwa nokugqwala, asikho isidingo sokwelashwa kwesibili kwe-anti-corrosion (ukufafaza noma ukudweba). Kodwa-ke, ukuze kongiwe izindleko zokusebenza zemishini nezakhiwo, kuncishiswe ukunakekelwa, futhi kuqhubeke kwandise impilo yensizakalo yegridi yensimbi ezindaweni ezinokhahlo, ngokuvamile kudingekile ukwenza isivikelo sesibili ku-hot-dip galvanized steel grating, okungukuthi, ukusebenzisa i-organic coating ehlobo endaweni eshisayo-dip ukuze kwakhiwe uhlelo oluphindwe kabili lwe-anti-corrosion.
Imvamisa, ama-grating ensimbi ngokuvamile afakwa ku-inthanethi ngokushesha ngemva kokushiswa kwe-hot-dip galvanizing. Ngesikhathi senqubo yokudlulisa, ukusabela kwe-oxidation kwenzeka ebusweni be-hot-dip galvanizing coating kanye nokubonwa kwesisombululo se-passivation, kwakha ifilimu ye-passivation eminyene futhi enamathele ngokuqinile ebusweni be-hot-dip galvanizing layer, edlala indima ekuthuthukiseni ukumelana nokugqwala kongqimba lwezinc. Kodwa-ke, kuma-gratings ensimbi adinga ukumbozwa nge-primer yasehlobo ukuze enze uhlelo lwe-anti-corrosion lwe-double layer ukuze luvikeleke, ifilimu yensimbi eqinile, ebushelelezi, futhi engenzi lutho kunzima ukuhlanganisa ngokuqinile ne-primer yasehlobo elandelayo, okuholela ekubhubhiseni ngaphambi kwesikhathi kanye nokuchithwa kwe-organic coating phakathi nesevisi, okuthinta umphumela wayo wokuvikela.
Ukuze kuthuthukiswe ukuqina kwezigaxa zensimbi eziphathwe nge-hot-dip galvanizing, ngokuvamile kungenzeka ukumboza i-organic coating efanelekile endaweni yayo ukuze kwakheke uhlelo lokuvikela oluyinhlanganisela lokuvikela. Uma kubhekwa ukuthi ingaphezulu longqimba olunamanzi olushisayo lwe-hot-dip grating yensimbi liyisicaba, libushelelezi, futhi limise okwensimbi, amandla okubopha phakathi kwawo nesistimu yokumboza elandelayo awanele, okungaholela kalula ekubhavuzeni, ekuchithekeni, kanye nokwehluleka ngaphambi kwesikhathi kokumboza. Ngokukhetha i-primer efanelekile noma inqubo efanele yokwelashwa, amandla okubopha phakathi kwe-zinc coating/primer coating angathuthukiswa, futhi umphumela wokuvikela wesikhathi eside wesistimu yokuvikela eyinhlanganisela ungenziwa.
Ubuchwepheshe obuyisihluthulelo obuthinta umphumela wokuvikela we-hot-dip galvanized steel grating surface protective coating system iphinde ibe ukwelashwa kwendawo ngaphambi kokumbozwa. I-Sandblasting ingenye yezindlela ezivame ukusetshenziswa futhi ezinokwethenjelwa zokwelashwa kwendawo yokwemboza insimbi, kodwa ngenxa yokuthi indawo efakwe uthayela eshisayo ithambile, ingcindezi ye-sandblasting eyeqile kanye nosayizi wezinhlayiyana zesihlabathi kungabangela ukulahlekelwa ungqimba lukathayela lwe-grating yensimbi. Ngokulawula ukucindezela kwesifutho nosayizi wezinhlayiya zesihlabathi, ukuqhunyiswa kwesihlabathi okumaphakathi endaweni yensimbi yokucwilisa eshisiwe kuyindlela esebenzayo yokwelapha engaphezulu, enomthelela owanelisayo ekubonisweni kwe-primer, futhi amandla okubopha phakathi kwawo kanye nongqimba lwamagalani wokucwilisa ashisayo mkhulu kuno-5MPa.
Ngokusebenzisa i-cyclic hydrogen primer equkethe i-zinc phosphate, ukunamathela phakathi kwe-zinc coating/organic primer ngokuyisisekelo kukhulu kuno-5MPa ngaphandle kokuqhunyiswa kwesihlabathi. Ngobuso be-hot-dip galvanized steel grating, lapho kungenakulungele ukusebenzisa ukwelashwa kwendawo ye-sandblasting, lapho okunye ukunamathela okuphilayo kucatshangelwa kamuva, kungakhethwa i-primer equkethe i-phosphate, ngoba i-phosphate ku-primer isiza ukuthuthukisa ukunamathela kwefilimu kapende futhi ithuthukise umphumela wokulwa nokugqwala.
Ngaphambi kokuba i-primer isetshenziswe ekwakhiweni kokugqoka, ungqimba olushisayo lwe-galvanized ye-steel grating luyadlula noma aludluliswanga. Ukwelashwa kusengaphambili akunawo umthelela obalulekile wokuthuthukisa ukunamathela, futhi ukusula utshwala akunawo umthelela osobala wokuthuthuka emandleni okubopha phakathi kwe-zinc coating/primer.