Isimiso sokufutha nge-zinc eshisayo singafingqwa kanje: okokuqala, umoya ocindezelayo kanye namapayipi asetshenziswa ukufutha izinhlayiya zesihlabathi ebusweni bento yokusebenza ukuze kususwe ukugqwala kanye nesilinganiso se-oxide ebusweni bensimbi, kuyilapho ubuso bungenamsebenzi ukwandisa amandla okumunca kwengubo yokufutha eshisayo. Ngemuva kwalokho, i-oxygen, i-acetylene noma umthombo wokushisa kagesi (ukushisa kagesi kusetshenziselwa izinto zokusebenza ezinkulu, i-oxygen kanye nokushisa kwe-acetylene kusetshenziselwa izinto zokusebenza ezincane neziphakathi nendawo) kusetshenziswa ngomoya ocindezelwe kanye namathuluzi akhethekile (izibhamu zokufutha) ukufutha i-zinc efakwe i-atomized ngesivinini esikhulu kakhulu ebusweni bensimbi.
Izinzuzo Zokubumba
1. Ukuhlanza ngokushisa okubandayo kusebenzisa i-pickling kanye ne-phosphating njengokwelashwa kwangaphambi kwesikhathi, kushiya insalela ye-asidi kanye ne-alkali ebusweni be-workpiece, okudala ingozi yokugqwala futhi kwenze i-zinc coating ebandayo ingakwazi ukwahlukana. Inqubo yokufutha nge-zinc isebenzisa i-sandblasting njengokwelashwa kwangaphambi kwesikhathi, okuholela endaweni yokusebenza ehlanzekile kakhulu futhi elukhuni. Lokhu kuvimbela ukugqwala kusuka ngaphakathi kuya ngaphandle kanye ne-zinc ngemuva kokufutha nge-zinc.
2. Ukushisa nge-galvanizing kudinga izinga lokushisa elithile elingaba ngu-440°C, okungabangela ukuguguleka kwento yokusebenza. Kodwa-ke, inqubo yokufutha nge-zinc isebenzisa izinga lokushisa eliphansi kakhulu, elingaphansi kuka-80°C, okuvimbela ukuguguleka. 3. Izinqubo zokufutha nge-galvanizing ezibandayo nezishisayo zikhawulela izinto zokusebenza ubude, ububanzi, kanye nokuphakama kwethangi lokufutha nge-galvanizing, kuyilapho izinqubo zokufutha nge-zinc zingenjalo.
4. Izinqubo zokugaya ezibandayo nezishisayo nazo ziletha inselele yokulungiswa endaweni. Umonakalo kuma-weld ngesikhathi sokufakwa, ukulayisha nokukhipha impahla endaweni, noma ukuthuthwa kungalungiswa kuphela ngopende. Ngokufafaza nge-zinc, ukulungiswa kwendawo kungenziwa kusetshenziswa ukufafaza nge-zinc, kugwenywe izinkinga zenqubo.
5. Ngenxa yokuthi i-cold-dip galvanizing isebenzisa i-pickling kanye ne-phosphating njengokwelashwa kwangaphambi kwesikhathi, indawo yokusebenza ilukhuni futhi ukunamathela kwe-coating akukuhle. Ngokuphambene nalokho, i-zinc spray isebenzisa i-sandblasting njengokwelashwa kwangaphambi kwesikhathi, okuholela ekubeni lukhuni kanye nokunamathela kwe-coating okungcono, ngamandla okunamathela angu-≥6 MPa.
6. Ukufaka i-galvanizing ebandayo kungcolisa kakhulu amanzi futhi kudala izinkinga ezinkulu zemvelo, kuyilapho ukufaka i-galvanizing eshisayo kudala umthelela omncane kakhulu ngokwemvelo. Ngakho-ke, ukufaka i-galvanizing eshisayo kuzoba yinto ethandwa kakhulu ekuvikeleni ukugqwala kwezakhiwo zensimbi.
Inqubo ye-Zinc eshisayo
Yonke inqubo yokwakha i-hot-spray zinc anti-corrosion ihlukaniswe ngezinyathelo ezine: ukwelashwa kwendawo → ukufutha i-zinc → ukwelashwa kokuvala → ukuhlolwa kwekhwalithi
Ukwelashwa Okuphezulu
Ngenxa yokuthi ikhwalithi yokuphathwa kwendawo ithinta ngqo ikhwalithi kanye nobude besikhathi sokugqoka, ukwelashwa okufanele kwangaphambi kobuso besisekelo kubalulekile. Gcoba ubuso besisekelo ngesando ukuze ususe ukugqwala ngokwezidingo zenqubo. Izindinganiso zokususa ukugqwala zinamathela kuzinga le-Sa3 ku-“Rust Grades and Rust Removal Grades for Steel Surfaces Before Painting” (GB8923-88). Leli zinga lichaza izidingo zekhwalithi ezilandelayo: Gcoba ngesihlabathi kahle ukuze ususe isikali, amafutha, ukugqwala, ukungcola, upende, nezinye izinamathiselo. Indawo kufanele ibonise ukukhanya kwensimbi okufanayo. Ngemva kokuqhuma ngesihlabathi, hlanza indawo ngomoya ohlanzekile, owomile ocindezelwe noma ngebhulashi elihlanzekile. Izinga le-Sa3 ku-“Rust Grades and Rust Removal Grades for Steel Surfaces Before Painting” (GB8923-88) kufanele futhi licatshangelwe.
Ukuqhuma kwesanti
Ngesikhathi senqubo yokufaka isicelo, kusetshenziswa imishini nezilinganiso ezilandelayo: i-air compressor, ithangi lomoya, isihlukanisi samanzi kawoyela, isihlungi somoya, ibhodwe lokuqhumisa isihlabathi, iteyipu yokunamathela, isibhamu sokuqhumisa isihlabathi, kanye ne-porcelain engagugi. Isihlabathi esiqinile sinobulukhuni obuphezulu, isihlabathi somfula esigobile (0.5-2mm). Isihlabathi kufanele somile, sibe nomswakama ongaphansi kuka-1%, futhi sihlanzekile futhi singenakungcola. I-nozzle isebenzisa i-porcelain enobunjwa obungu-L ekhulayo. Ngesigaba sokukhulisa-ukucindezela-ukwandisa, ukugeleza komoya ophuma e-nozzle yokuqhumisa isihlabathi kufinyelela isivinini esiphezulu, kukhulisa kakhulu amandla e-kinetic e-abrasive, kusebenze futhi kufake ugesi ebusweni be-substrate, ngaleyo ndlela kwandisa amandla okubopha kwengubo. Inqubo yokususa ukugqwala ihilela umoya ocindezelwe ongena ethangini lomoya, udlula esihlukanisi samanzi kawoyela kanye nesihlungi somoya ukuze uhlanzeke, wome, futhi ungabi namafutha, ngaphambi kokungena ebhodweni lokuqhumisa isihlabathi. Iteyipu yokunamathela icindezela isihlabathi ebhodweni lokuqhumisa isihlabathi bese isiqhumisa esisekelweni sensimbi. Kusetshenziswa le mishini nezimo, ukwelashwa kwendawo kungahlangabezana nezindinganiso ze-Sa3, ngokuba nobukhulu bomphezulu obungu-40-60µm. Kuleli qophelo, amandla e-electrode, izinga lokusebenza, kanye nokunamathela kombala womphezulu wensimbi konke kufinyelele kumapharamitha afanele.
Ukufutha nge-Zinc
Ukufutha nge-zinc kufanele kuqedwe zingakapheli amahora angu-2-3 kusukela ekuqhumeni kwesihlabathi. Lokhu kungenxa yokuthi amandla e-electrode ebusweni be-substrate ngemva kokuqhumisa isihlabathi ahluke kakhulu kunalawo angaphambi kokwelashwa, okwenza ukuthi ifinyelele amandla ayo amancane. Kuleli qophelo, ukusebenza kobuso be-substrate kufinyelela inani layo eliphezulu, futhi amandla okubopha phakathi kwe-substrate kanye nokugqoka asezingeni eliphezulu kakhulu. Amandla e-electrode ebusweni be-substrate ahlala eqinile amahora angu-2-3. Ngokuhamba kwesikhathi, amandla e-electrode ebusweni aqala ukwanda, amandla okusebenza ayancipha, futhi amandla okubopha phakathi kokugqoka kanye ne-substrate ayancipha. Lokhu kungenxa yobukhulu befilimu ye-oxide ebusweni. Zingakapheli amahora angu-2-3, ifilimu ye-oxide encane iphulwa kalula yizinhlayiya zokufutha ezisheshayo lapho zithinta ubuso. Ngemva kwamahora angu-2-3, ifilimu ye-oxide isebenza njengesivikelo phakathi kokugqoka kanye ne-substrate, okuphazamisa ukunamathelana phakathi kokugqoka kanye ne-substrate. Imishini yokufutha isebenzisa isibhamu sokufutha esikhiqizwe ekhaya (ngokuvamile isibhamu sokufutha esiphathwa ngesandla saseZhonglian esivela eShanghai Spraying Machinery Factory). Izinto ze-zinc ezisetshenziswayo ziyi-zinc wire yekhwalithi ephezulu, engenawoyela enobubanzi obungu-3 mm kanye nokuqukethwe kwe-zinc okungenani okungu-99.5%-99.7%.
Isikhathi sokuthunyelwe: Septhemba-05-2025
