Chikafu chekudya chemumagaba, kuchengetedzwa, kureruka, kunofanirwa kunge kuri chikafu chiri nyore.Asi sezvo magaba akavharwa zvakazara mumakumi mashoma emakore apfuura, magaba emagirazi akasarudzwa kubva mumabhodhoro ebudiriro eSuzhou, achiparadzira shoko rekuti “gaba rinonaka uye muromo unonetsa kuvhura”.Ndiwo mubvunzo mukuru.Vatengi havasi nyore kudya, pamwe chete nekukanganisa kwakakomba pakuvandudzwa kweindasitiri yematini.Iye zvino kushingaira kusimudzira indasitiri ye canning, tinplate cans ane nyore-ku-kuvhurika chivharo, girazi makeni ane chivharo chisina kuvharwa.Anopfuura makore gumi apfuura, vanhu vazhinji vakasarudza kushandisa zvivharo zviri nyore, izvo zvaive makeni ehupfumi husere hweporridge.Pazasi pegaba pakaiswa tini.Mavharo ari nyore aive akagadzirwa nealuminium alloy uye akabatanidzwa nechipunu chepurasitiki chidiki.Chikafu chaive chakanakira uye vatengi vainzwa kugutsikana kwazvo, ikozvino, mutengo wegore wekutengesa wemupunga wemupunga wemugaba ungangoita 300,000 matani.
Zvisinei, haasi marudzi ose ezvokudya zvemumagaba anogona kuenzanisirwa babao porridge inogona kusarudzachigaba chepurasitiki chekudya chine chivharo chakavhurika nyore.Mumakore mashoma apfuura, fekitori yechikafu chemumagaba muGuangdong yakagadzira zvigubhu zvematomatisi.Makoni acho aigadzirwa nesimbi yesimbi uye aruminiyamu alloy ane mavharo ari nyore kudhonza, uye zviri mukati maive ne0.5% sodium chloride (NaCl) .Iyo chlorine yemukati yakaverengerwa kuva 303 mg / kg, mushure memwedzi yakati wandei yekuchengetedza, kugadzirwa kwakamanikidzwa kumira nekuda kwekudonha matangi parivet uye mutsara wezvivharo zviri nyore.
Tinplate inoshandiswa pazasi pegaba muviri.Kana chivharo chechigadziko chakagadzirwa nealuminium alloy, micro-battery inoumbwa mushure mokunge chikafu chikandwa, uye bimetallic reaction inoitika.Aluminium ndiyo anode uye tini ndiyo cathode.Kana iyo cathode nzvimbo yakakura kupfuura iyo anode nzvimbo, iyo anode chikamu chekurwisa kwakadzika gomba, kusvika pakaputika.Makore mashoma apfuura, gaba rakakurumbira rekokonati kuTaiwan rakagadzirwa nealuminium alloy ine kavha yakavhurika nyore uye tinplate pazasi pegaba.Iko kuwanda kweiyo chloride ions mune zviri mukati yakasvika 440 ~ 1492 mg/kg, Ph = 4.4 ~ 4.6, kunyanya malic acid.Muchikamu chekutanga cheCanning, iyo inoparadza zvinhu (malic acid, chloride ion) inozadza firimu rekuvhara uye kuita iyo electrochemical reaction.Parizvino, firimu rekuputira iri cathode, firimu rekuputira rinokuvadzwa nefirimu rakafumurwa tini, simbi yeanode, kusvika nzvimbo yakakodzera yetini, simbi yakafumurwa, uye aluminium iri nyore kudhonza chivharo nekuda kwekukuvadzwa kwetambo yealuminium. pamwe chete kuti vagadzire micro-battery, kuitira bimetallic mhinduro.Panguva ino, aruminiyamu yeanodic attack corrosion dissolution, pamwe nekuvapo kwechloride ion mune zviri mukati, inosimudzira corrosion mhinduro kuti ikurumidze kugadzirwa kwealuminium alloy nyore-kudhonza cap rivet, mutsara wekupwanya.
Zvinonzi zvimwe zvikafu zvine asidhi yakawanda zvine chloride ions inopfuura 100mg/kg, kusanganisira nyama yemumagaba, huku uye miriwo yemumvura (nekuda kwekutora chikamu mumunyu kana sodium chloride), tinplate inoshandiswa pasi pegaba remuviri, uye aluminium alloy haina kukodzera kuvhara kwegaba, tinplate inofanira kushandiswa nyore kudhonza chivharo, kudzivirira kuitika kwebimetallic electrochemical reaction uye perforation.
Nguva yekutumira: May-10-2022