Cov khoom noj khoom haus hauv kaus poom, kev nyab xeeb, yooj yim, yuav tsum yog cov khoom noj yooj yim tshaj plaws.Tab sis raws li cov kaus poom tau ntim rau hauv ob peb lub xyoo dhau los, cov kaus poom iav tau raug xaiv los ntawm Suzhou-style lub raj mis ua tau zoo, tshaj tawm cov lus hais tias "qhov tau saj zoo thiab lub qhov ncauj nyuaj qhib".Qhov ntawd yog lo lus nug loj.Cov neeg siv khoom tsis yooj yim noj, ua ke nrog kev cuam tshuam loj heev rau kev tsim cov kaus poom kev lag luam.Tam sim no nquag txhawb kev lag luam canning, tinplate poom nrog lub hau yooj yim-rau-qhib, iav kaus poom nrog unscrewed hau.Ntau tshaj kaum xyoo dhau los, ntau tus neeg tau xaiv los siv lub hau yooj yim, uas yog cov kaus poom ntawm yim-khoom muaj nqis porridge.Hauv qab ntawm lub kaus mom lub cev tau tinned.Lub hau yooj yim yog ua los ntawm aluminium alloy thiab txuas nrog ib rab diav me me.Cov zaub mov tau yooj yim heev thiab cov neeg siv khoom txaus siab heev, tam sim no, cov khoom lag luam muag txhua xyoo ntawm cov kaus poom paj npleg yog li 300,000 tons.
Txawm li cas los xij, tsis yog txhua yam khoom noj kaus poom tuaj yeem ua qauv babao porridge tuaj yeem xaivyas ntim zaub mov nrog lub hau yooj yim qhib.Ob peb xyoos dhau los, ib lub khw muag khoom noj kaus poom hauv Guangdong tau tsim cov kua txiv lws suav.Cov kaus poom tau ua los ntawm tinned hlau thiab aluminium alloy nrog lub hau yooj yim rub, thiab cov ntsiab lus muaj 0.5% sodium chloride (NaCl).Cov ntsiab lus chlorine tau suav tias yog 303 mg / kg, tom qab ob peb lub hlis ntawm kev khaws cia, kev tsim khoom raug yuam kom nres vim cov tso tsheb hlau luam ntawm cov rivet thiab kab ntawm lub hau yooj yim.
Tinplate yog siv rau hauv qab ntawm lub cev.Yog tias lub hau ntawm lub kaus poom yog ua los ntawm txhuas alloy, lub roj teeb micro yog tsim tom qab cov zaub mov yog cov kaus poom, thiab cov tshuaj tiv thaiv bimetallic tshwm sim.Aluminium yog lub anode thiab tin yog cathode.Thaum lub cheeb tsam cathode loj dua qhov chaw anode, qhov anode ib feem ntawm qhov kev tawm tsam sib sib zog nqus pitting, kom txog rau thaum lub perforation.Ob peb xyoos dhau los, cov txiv maj phaub nrov hauv Taiwan yog ua los ntawm txhuas alloy nrog yooj yim-qhib npog thiab tinplate nyob rau hauv qab ntawm lub kaus poom.Qhov concentration ntawm chloride ions nyob rau hauv cov ntsiab lus mus txog 440 ~ 1492 mg / kg, Ph = 4.4 ~ 4.6, feem ntau yog malic acid.Nyob rau theem pib ntawm Canning, corrosive Cheebtsam (malic acid, chloride ion) saturate lub txheej zaj duab xis thiab nqa tawm cov tshuaj tiv thaiv electrochemical.Tam sim no, txheej zaj duab xis yog cathode, txheej zaj duab xis yog puas los ntawm cov zaj duab xis raug tin, hlau rau anode, kom txog rau thaum lub cheeb tsam tsim nyog ntawm tin, hlau raug, thiab txhuas yooj yim rub cover vim kev puas tsuaj ntawm txhuas hlua. ua ke los tsim ib lub roj teeb micro, rau cov lus teb bimetallic.Tam sim no, txhuas rau anodic nres corrosion dissolution, ua ke nrog cov muaj chloride ion nyob rau hauv cov ntsiab lus, txhawb corrosion teb rau leeb txoj kev loj hlob ntawm aluminium alloy yooj yim-rub cap rivet, kab perforation.
Nws tau tshaj tawm tias qee cov khoom noj muaj kua qaub muaj cov tshuaj chloride ntau tshaj 100mg / kg, nrog rau cov nqaij hauv kaus poom, nqaij qaib thiab cov zaub hauv dej (raws li kev noj cov ntsev los yog sodium chloride), tinplate yog siv rau hauv qab ntawm lub cev, thiab aluminium alloy tsis haum rau lub hau npog, tinplate yuav tsum tau siv yooj yim los rub lub hau, kom tsis txhob muaj qhov tshwm sim ntawm bimetallic electrochemical tshuaj tiv thaiv thiab perforation.
Post lub sij hawm: May-10-2022