Indlela yokuthintela ukubola kwesakhiwo sensimbi?

Ngokunyuka okuzinzileyo kwemveliso yensimbi, izakhiwo zetsimbi zithandwa kakhulu.Isetyenziswa ngokubanzi njengendawo yokugcina impahla, iworkshop, igaraji, i-prefab apartment, ivenkile yokuthenga, ibala lemidlalo, njl.Nangona kunjalo, izakhiwo zetsimbi zilula ukugqwala, ngoko ke i-anti-corrosion ibaluleke kakhulu kwizakhiwo zetsimbi.

Iintlobo ze-corrosion yezakhiwo zetsimbi ziquka ukubola kwe-atmospheric, i-corrosion yendawo kunye noxinzelelo lwe-corrosion.

(1) Umhlwa womoya

I-atmospheric corrosion yezakhiwo zetsimbi ibangelwa ikakhulu yimichiza kunye nemiphumo ye-electrochemical yamanzi kunye ne-oksijini emoyeni.Umphunga wamanzi emoyeni wenza umaleko we-electrolyte kumphezulu wesinyithi, kwaye ioksijini esemoyeni inyibilika kuyo njenge-cathode depolarizer.Benza isiseko se-galvanic cell esonakalisayo kunye namalungu entsimbi.Emva kokuba i-rust layer yenziwe phezu kwamalungu entsimbi ngokutya kwe-atmospheric, iimveliso ze-corrosion ziya kuchaphazela ukusabela kwe-electrode ye-corrosion ye-atmospheric.

(2) Umhlwa wendawo

Umhlwa wendawo yeyona ixhaphakileyo kwizakhiwo zentsimbi, ikakhulu igalvanic corrosion kunye necrevice corrosion.I-galvanic corrosion ivela ikakhulu kwiindidi ezahlukeneyo zetsimbi okanye ukudityaniswa kwezakhiwo zentsimbi.Isinyithi esinempembelelo engalunganga sikhula ngokukhawuleza, ngelixa isinyithi esinamandla afanelekileyo sikhuselekile.Ezi zinyithi zimbini zenza i-galvanic cell eyonakalisayo.

I-Crevice corrosion iyenzeka ikakhulu kwimingxuma yomhlaba phakathi kwamalungu ahlukeneyo esakhiwo sentsimbi kunye naphakathi kwamalungu entsimbi kunye ne-non-metal.Xa ububanzi bemingxuma bunokwenza ulwelo luzinze kwintanda, olona luhlu lubuthathaka lwenkqantosi yesakhiwo sentsimbi umhlwa yi-0.025 ~ o.1mm.

(3) Uxinzelelo lomhlwa

Kwindawo ethile, isakhiwo sensimbi sinokugqwala okuncinci xa singekho phantsi koxinzelelo, kodwa emva kokuxhatshazwa kwengcinezelo, icandelo liya kuphuka ngokukhawuleza emva kwexesha elithile.Ngenxa yokuba akukho phawu lucacileyo lokuqhekeka koxinzelelo kwangaphambili, ihlala ikhokelela kwiziphumo ezibi, njengokuwa kwebhulorho, ukuvuza kwemibhobho, ukuwa kwesakhiwo njalo njalo.

Ngokwendlela ye-corrosion yesakhiwo sensimbi, ukubola kwayo luhlobo lomonakalo ongalinganiyo, kwaye i-corrosion ikhula ngokukhawuleza.Nje ukuba umphezulu wesakhiwo sentsimbi udliwe, umngxuma wokubola uya kukhula ngokukhawuleza ukusuka ezantsi ukuya kubunzulu, okukhokelela ekugxininiseni koxinzelelo lwesakhiwo sentsimbi, okuya kukhawulezisa ukubola kwentsimbi, okusisangqa esibi.

I-Corrosion inciphisa ukuxhathisa okubandayo kunye namandla okudinwa kwentsimbi, okukhokelela ekuqhekekeni kwe-brittle ngokukhawuleza kwamacandelo athwele umthwalo ngaphandle kweempawu ezicacileyo zokuguqulwa, okukhokelela ekuweni kwezakhiwo.

Indlela yokukhusela ye-corrosion yesakhiwo sensimbi

1. Sebenzisa intsimbi ekwazi ukumelana nemozulu

Uluhlu lwentsimbi ephantsi ye-alloy phakathi kwentsimbi eqhelekileyo kunye nentsimbi engenasici.I-Weathering steel yenziwe ngentsimbi yekhabhoni eqhelekileyo kunye nenani elincinci lezinto ezinganyangekiyo kwi-corrosion ezifana nobhedu kunye ne-nickel.Ineempawu zamandla kunye nokuqina, ukwandiswa kweplastiki, ukubunjwa, i-welding kunye nokusika, i-abrasion, ukushisa okuphezulu kunye nokumelana nokukhathala kwensimbi ephezulu;Ukumelana nemozulu yi-2 ~ 8 amaxesha e-carbon steel eqhelekileyo, kunye nokusebenza kokugquma yi-1.5 ~ 10 amaxesha e-carbon steel eqhelekileyo.Kwangaxeshanye, ineempawu zokumelana nokugqwala, ukumelana nokugqwala kwamacandelo, ukwandiswa kobomi, ukuncipha kunye nokunciphisa ukusetyenziswa, ukonga abasebenzi kunye nokonga amandla.I-Weathering steel isetyenziselwa ubukhulu becala kwizakhiwo zetsimbi ezivezwe emoyeni ixesha elide, njengomzila kaloliwe, izithuthi, iibhulorho, iinqaba njalo njalo.Isetyenziselwa ukwenza izitya, izithuthi zikaloliwe, iiderricks ze-oyile, izakhiwo zaselwandle, amaqonga okuvelisa i-oyile kunye nezikhongozeli eziqulethe i-hydrogen sulfide corrosive media kwi-chemical and petroleum equipment.Ukuqina kwayo kwefuthe eliphantsi lobushushu kukwangcono kunoko kwentsimbi yesakhiwo ngokubanzi.Umgangatho yintsimbi yemozulu yezakhiwo ezidibeneyo (GB4172-84).

Umaleko we-amorphous spinel oxide malunga ne-5O ~ 100 m ubukhulu obuqulunqwe phakathi kwe-rust layer kwaye i-matrix ixinene kwaye inonamathele kakuhle kunye nentsimbi ye-matrix.Ngenxa yobukho befilimu ye-oxide exineneyo, ikhusela ukungena kwe-oksijini kunye namanzi emoyeni kwi-matrix yensimbi, iyancipha ukuphuhliswa okunzulu kwe-corrosion kwizinto zetsimbi, kwaye iphucula kakhulu ukuxhatshazwa kwe-atmospheric corrosion of steel materials.

2. Idiphu eshushu yokufaka igalvanizing

Idiphu eshushu yokuthintela umhlwa kukudipha i-workpiece ukuba ifakwe kwibhafu yensimbi etyhidiweyo ye-zinc yokucoca, ukuze wenze i-zinc ecocekileyo yokubeka phezu kwendawo yokusebenza kunye ne-zinc alloy coating kumphezulu wesibini, ukuze uqonde. ukukhuselwa kwentsimbi kunye nentsimbi.

3. I-Arc yokutshiza i-anticorrosion

Ukutshiza kwe-Arc kukusebenzisa izixhobo zokutshiza ezikhethekileyo zokunyibilikisa ucingo lwentsimbi olutshiziweyo phantsi kwesenzo sombane ophantsi kunye nophezulu lwangoku, uze emva koko utshize kumacandelo esinyithi agalelwe isanti ngaphambili kwaye agxothwe ngumoya ocinezelweyo ukwenza i-arc etshizwe nge-zinc kunye ne-aluminium yokwambathisa, itshizwe ngeengubo zokuvala zokuvala ukubola ukwenza i-anti-corrosion composite coating yexesha elide.I-coating etyebileyo inokuthintela ngokufanelekileyo i-corrosive medium ukuba ingene kwi-substrate.

Iimpawu ze-arc yokutshiza i-anti-corrosion yile: i-coating ine-adhesion ephezulu, kwaye i-adhesion yayo ayihambelani nepeyinti ecebileyo ye-zinc kunye ne-hot-dip zinc.Iziphumo zovavanyo lokugoba impembelelo kwi workpiece ephathwa nge-arc yokutshiza unyango lokuchasana nomhlwa kuphela ukuhlangabezana ngokupheleleyo nemigangatho efanelekileyo, kodwa eyaziwa ngokuba "ipleyiti yentsimbi elaminethiweyo";Ixesha elichasayo lokutshiza lokutshiza kwearc lide, ngokubanzi lingama-30 ~ 60A, kwaye ubungqingqwa bokwambathisa bumisela ubomi bokuchasana nokubola kwengubo.

4. Anti corrosion of thermal sprayed aluminiyam (zinc) composite coating

I-Thermal yokutshiza i-aluminiyam (i-zinc) i-composite coating yindlela yexesha elide yokuchasana ne-corrosion enesiphumo esifanayo ne-hot-dip galvanizing.Inkqubo kukususa i-rust ebusweni belungu lentsimbi ngokuqhunyiswa kwesanti, ukwenzela ukuba umphezulu ubonakaliswe nge-metallic luster kunye ne-roughened;Emva koko sebenzisa i-acetylene i-oksijini ilangatye lokunyibilikisa i-aluminium (zinc) ethunyelwa ngokuqhubekayo kwaye uyivuthele kumphezulu wamalungu ensimbi ngomoya oxinzelelweyo ukwenza i-honeycomb aluminium (zinc) yokutshiza umaleko (ukutyeba malunga ne-80 ~ 100m);Ekugqibeleni, iipores zizaliswe nge-epoxy resin okanye ipeyinti ye-neoprene ukwenza i-coating composite.Thermal sprayed aluminiyam (zinc) composite Coating ayikwazi ukusetyenziswa kudonga lwangaphakathi amalungu tubular.Ke ngoko, zombini iziphelo zamalungu e-tubular kufuneka zitywinwe zingangeni moya ukuthintela ukubola kudonga lwangaphakathi.

Inzuzo yale nkqubo kukuba inamandla okuguquguquka kubukhulu bamacandelo, kwaye imilo kunye nobukhulu bamacandelo aphantse angenamkhawulo;Enye inzuzo kukuba umphumo we-thermal wenkqubo yindawo, ngoko ke amacandelo akayi kuvelisa i-thermal deformation.Xa kuthelekiswa ne-hot-dip galvanizing, iqondo loshishino lwe-thermal yokutshiza i-aluminiyam (zinc) i-composite coating iphantsi, amandla okusebenza okuqhushumba kwesanti kunye ne-aluminiyam (zinc) yokutshiza iphezulu, kwaye umgangatho nawo uchaphazeleka ngokulula lutshintsho lweemvakalelo zabaqhubi. .

5. Ukugquma i-anticorrosion

I-coating anti-corrosion yesakhiwo sensimbi idinga iinkqubo ezimbini: unyango lwesiseko kunye nokwakhiwa kweengubo.Injongo yonyango lwekhosi yesiseko kukususa i-burr, i-rust, ibala le-oyile kunye nezinye iziqhotyoshelo kumphezulu wamacandelo, ukuze kuvezwe i-metallic luster kumphezulu wamacandelo;Ngokucokisekileyo ngakumbi unyango lwesiseko, ngcono umphumo wokubambelela.Iindlela zonyango ezisisiseko ziquka unyango lwe-manual kunye noomatshini, unyango lweekhemikhali, unyango lokutshiza ngoomatshini, njl.

Ngokuphathelele ukwakhiwa kokugquma, iindlela zokuxubha ezisetyenziswa ngokuqhelekileyo ziquka indlela yokuxubha ngesandla, indlela yokuqengqa ngesandla, indlela yokudipha yokugquma, indlela yokutshiza ngomoya kunye nendlela yokutshiza engenamoya.Indlela yokuxubha enengqiqo inokuqinisekisa umgangatho, inkqubela phambili, ukonga izixhobo kunye nokunciphisa iindleko.

Ngokubhekiselele kwisakhiwo sokugubungela, kukho iifom ezintathu: i-primer, ipeyinti ephakathi, i-primer, i-primer kunye ne-primer.I-primer ikakhulu idlala indima yokubambelela kunye nokuthintela umhlwa;I-topcoat ikakhulu idlala indima ye-anti-corrosion kunye ne-anti-aging;Umsebenzi wepeyinti ephakathi phakathi kwe-primer kunye nokugqiba, kwaye unokunyusa ubukhulu befilimu.

Kuphela xa i-primer, isambatho esiphakathi kunye neengubo eziphezulu zisetyenziselwa kunye zingadlala indima engcono kwaye zifezekise umphumo ongcono.

Ixesha lokuposa: Mar-29-2022