Umgaqo wokutshiza nge-zinc eshushu ungashwankathelwa ngolu hlobo lulandelayo: okokuqala, umoya ophantsi koxinzelelo oluphezulu kunye nemibhobho isetyenziselwa ukuvuthela amasuntswana esanti phezu komphezulu wesixhobo sokusebenza ukususa umhlwa kunye ne-oxide scale kumphezulu wesinyithi, ngelixa umphezulu ungasasebenzi ukwandisa amandla okufunxa kwe-thermal spray coating. Emva koko, i-oksijini, i-acetylene okanye umthombo wobushushu wombane (ubushushu bombane busetyenziselwa izinto ezinkulu zokusebenza, i-oksijini kunye nokufudumeza nge-acetylene kusetyenziswa izinto ezincinci neziphakathi) kusetyenziswa umoya ocinezelweyo kunye nezixhobo ezikhethekileyo (izibhamu zokutshiza) ukutshiza i-zinc efakwe kwi-atomized ngesantya esiphezulu kumphezulu wesinyithi.
Iingenelo zokuqinisa i-galvanizing
1. Ukucoca nge-cold galvanizing kusebenzisa i-pickling kunye ne-phosphating njengonyango lwangaphambi konyango, kushiya intsalela ye-asidi kunye ne-alkali kumphezulu we-workpiece, nto leyo edala umngcipheko wokugqwala kwaye yenze ukuba i-cold-dip zinc coating ibe sesichengeni sokuqhekeka. Inkqubo yokutshiza nge-zinc isebenzisa i-sandblasting njengonyango lwangaphambi konyango, nto leyo ekhokelela kumphezulu we-workpiece ococekileyo kakhulu norhabaxa. Oku kuthintela ukugqwala ngaphakathi nangaphandle kunye nokuqhekeka kwe-zinc emva kokutshiza nge-zinc.
2. Ukufaka i-galvanizing eshushu kufuna ubushushu obuthile obumalunga nama-440°C, nto leyo enokubangela ukuguquka kwe-workpiece. Nangona kunjalo, inkqubo yokutshiza i-zinc isebenzisa ubushushu obuphantsi kakhulu, obungaphantsi kwama-80°C, nto leyo ethintela ukuguquka kwe-conversion. 3. Iinkqubo zokutshiza i-galvanizing ebandayo neshushu zinciphisa ubude, ububanzi, kunye nokuphakama kwetanki yokutshiza i-galvanizing, ngelixa iinkqubo zokutshiza i-zinc zingenjalo.
4. Zombini iinkqubo zokugalela isinyithi ezibandayo nezishushu nazo zizisa umngeni wokulungiswa kwindawo. Umonakalo kwiintsimbi ngexesha lokufakelwa, ukulayisha nokukhupha impahla kwindawo, okanye ukuthuthwa ungalungiswa kuphela ngepeyinti. Ngokutshiza nge-zinc, ukulungiswa kwendawo kungenziwa ngokusebenzisa i-zinc spray, kuthintelwe iingxaki zenkqubo.
5. Ngenxa yokuba i-cold-dip galvanizing isebenzisa i-pickling kunye ne-phosphating njengonyango lwangaphambi konyango, umphezulu we-workpiece urhabaxa kwaye ukunamathela kwe-coating akusebenzi kakuhle. Ngokwahlukileyo koko, i-zinc spray isebenzisa i-sandblasting njengonyango lwangaphambi konyango, nto leyo ebangela ukuba i-coating ibe rhabaxa kwaye i-coating adhesion ibe ngcono, enamandla okutsalwa angama-≥6 MPa.
6. Ukufaka i-galvanizing kwi-cold-dip kungcolisa kakhulu amanzi kwaye kubangela iingxaki ezinkulu kwindalo, ngelixa ukufaka i-hot-dip galvanizing kunika impembelelo encinci kwindalo. Ke ngoko, ukufaka i-hot-dip galvanizing kuya kuthandwa ngakumbi ekukhuseleni ukugqwala kwezakhiwo zentsimbi.
Inkqubo yeZinc yokutshiza eshushu
Lonke inkqubo yokwakha i-zinc eshushu ethintela ukubola yahlulwe yangamanyathelo amane: unyango lomphezulu → ukutshiza i-zinc → unyango lokutywina → ukuhlolwa komgangatho
Unyango Lomphezulu
Ngenxa yokuba umgangatho wonyango lomphezulu uchaphazela ngokuthe ngqo umgangatho kunye nobude bengubo, unyango olufanelekileyo lwangaphambi komgangatho wesiseko lubalulekile. Gcoba umphezulu wesiseko ngesanti ukuze kususwe umhlwa ngokweemfuno zenkqubo. Imigangatho yokususa umhlwa ihambelana nomgangatho we-Sa3 kwi-"Rust Grades and Rust Removal Grades for Steel Surfaces Before Painting" (GB8923-88). Lo mgangatho uchaza ezi mfuno zilandelayo zomgangatho: Gcoba ngesanti ngokupheleleyo ukuze kususwe isikali, igrisi, umhlwa, ukungcola, ipeyinti, kunye nezinye izinto ezincamathiselweyo. Umphezulu kufuneka ubonise ukukhanya okufana kwesinyithi. Emva kokugcoba ngesanti, coca umphezulu ngomoya ococekileyo, owomileyo ocinezelweyo okanye ngebrashi ecocekileyo. Umgangatho we-Sa3 kwi-"Rust Grades and Rust Removal Grades for Steel Surfaces Before Painting" (GB8923-88) nawo kufuneka uqwalaselwe.
Ukuqhuma kwesanti
Ngexesha lenkqubo yokufaka isicelo, kusetyenziswa ezi zixhobo kunye neendlela ezilandelayo: i-air compressor, itanki yomoya, isahluli samanzi eoyile, isihluzi somoya, imbiza yokuqhumisa isanti, iteyiphu yokuncamathelisa, isibhamu sokuqhumisa isanti, kunye ne-porcelain engagugiyo. I-abrasive inobunzima obuphezulu, isanti yomlambo enekona (0.5-2mm). Isanti kufuneka yome, ibe nomxholo wokufuma ongaphantsi kwe-1%, kwaye icocekile kwaye ingenazo izinto ezingcolileyo. I-nozzle isebenzisa i-porcelain enobume be-L ekhulayo. Ngesigaba sokwandisa-uxinzelelo-ukwandisa, ukuhamba komoya ophuma kwi-nozzle yokuqhumisa isanti kufikelela kwisantya esiphezulu, kwandisa kakhulu amandla e-kinetic e-abrasive, kusebenze ngakumbi kwaye kufake umbane kumphezulu we-substrate, ngaloo ndlela kwandisa amandla okubopha kwengubo. Inkqubo yokususa umhlwa ibandakanya umoya ocinezelweyo ongena kwi-air tank, udlula kwi-oil-water separator kunye ne-air filter ukuze icoceke, yome, kwaye ingabi naoyile, ngaphambi kokuba ingene kwi-sandblasting pot. Iteyiphu yokuncamathelisa icinezela isanti kwi-sandblasting gun kwaye iyiqhumise kwi-substrate yesinyithi. Ngokusebenzisa ezi zixhobo kunye neemeko, unyango lomphezulu lunokufikelela kwimigangatho ye-Sa3, enoburhabaxa bomphezulu obuyi-40-60µm. Kweli nqanaba, amandla e-electrode, inqanaba lokusebenza, kunye nokunamathela kombala womphezulu wesinyithi zonke zifikelele kwiiparameter ezifanelekileyo.
Ukutshiza iZinc
Ukutshiza nge-zinc kufuneka kugqitywe kwiiyure ezi-2-3 emva kokuqhumisa isanti. Oku kungenxa yokuba amandla e-electrode kumphezulu we-substrate emva kokuqhumisa isanti ahluke kakhulu kunalawo angaphambi kokunyangwa, nto leyo ebangela ukuba ifikelele kumandla ayo amancinci. Kule ndawo, ukusebenza komphezulu we-substrate kufikelela kwixabiso layo eliphezulu, kwaye amandla okubopha phakathi kwe-substrate kunye nokwaleka aphezulu. Amandla e-electrode kumphezulu we-substrate ahlala ezinzile iiyure ezi-2-3. Ekuhambeni kwexesha, amandla e-electrode kumphezulu aqala ukwanda, amandla okusebenza ayancipha, kwaye amandla okubopha phakathi kokwaleka kunye ne-substrate ayancipha. Oku kungenxa yobukhulu befilimu ye-oxide yomphezulu. Kwiiyure ezi-2-3, ifilimu ye-oxide encinci iyaphulwa ngokulula ngamaqhekeza okutshiza akhawulezayo xa echaphazela umphezulu. Emva kweeyure ezi-2-3, ifilimu ye-oxide isebenza njengomqobo phakathi kokwaleka kunye ne-substrate, iphazamisa ukunamathelana phakathi kokwaleka kunye ne-substrate. Izixhobo zokutshiza zisebenzisa isibhamu sokutshiza esenziwe ekhaya (ngesiqhelo isibhamu sokutshiza esiphathwa ngesandla saseZhonglian esivela kwiShanghai Spraying Machinery Factory). Izinto ze-zinc ezisetyenzisiweyo zi-zinc wire ezikumgangatho ophezulu, ezingena-oyile, ububanzi bazo buyi-3 mm kunye nomxholo we-zinc ubuncinane obuyi-99.5%-99.7%.
Ixesha leposi: Septemba-05-2025
