Iyo yakawanda yekuora mumidziyo yesimbi inoitika munzvimbo dzemuchadenga, iyo ine corrosion-inducing factor uye zvinhu zvakaita seokisijeni, hunyoro, kusiyanisa kwetembiricha, uye zvinosvibisa.Salt spray corrosion inzira yakajairika uye inoparadza zvakanyanya yekuora kwemhepo.
Munyu wekupfapfaidza ngura inonyanya kusanganisa kupindira kweiyo conductive munyu mhinduro mukati memidziyo yesimbi, zvichitungamira kune electrochemical reaction.Izvi zvinoguma nekugadzirwa kwemasero e-microgalvanic, ane "yakaderera-inogoneka simbi-electrolyte mhinduro-yakakwirira-inogona kusachena" kugadzirisa.Electron transfer inoitika, uye simbi ichiita seanode inonyungudika, ichiita makomisheni matsva, kureva, corrosion products.Chloride ions inobata basa rakakosha mukuora kwemunyu wekupfapfaidza.Ivo vane masimba akasimba ekupinda, vachipinza zviri nyore simbi ye oxide layer uye kukanganisa iyo simbi passivation state.Uyezve, chloride ion ine yakaderera hydration simba, ichiita kuti igone kushambadza kune simbi pamusoro, ichibvisa okisijeni mukati mekudzivirira simbi oxide layer, nekudaro ichikonzera kukuvara kwesimbi.
Kuyedza kupfapfaidza munyu kwakakamurwa mumhando mbiri huru: bvunzo dzechisikigo kuratidzwa kwezvakatipoteredza uye yekugadzira yakakwidziridzwa inoteedzerwa munyu pfapfaidzo yemamiriro ekunze.Iyo yekupedzisira inoshandisa mudziyo wekuyedza, unozivikanwa sekamuri yekupfapfaidza munyu, ine vhoriyamu inodzorwa uye inogadzira nzvimbo yekupfapfaidza munyu zvisirizvo.Mukamuri iyi, zvigadzirwa zvinoongororwa kuti zvinoramba sei kusvibiswa kwemunyu.Kuenzaniswa nenzvimbo dzechisikigo, huwandu hwemunyu munzvimbo yekupfapfaidza munyu hunogona kuwanda kanoverengeka kana makumi enguva yakakwirira, zvichiwedzera kukurumidza kukora.Kuitisa bvunzo dzekupfapfaidza munyu pane zvigadzirwa zvinobvumira kwenguva pfupi yekuyedza, nemhedzisiro yakafanana nemhedzisiro yekuratidzwa kwechisikigo.Semuyenzaniso, kunyangwe zvichigona kutora gore kuti uongorore kukora kwechigadzirwa sampuli munzvimbo yakasikwa yekunze, kuita bvunzo imwe chete munzvimbo yakatevedzwa yekupfapfaidza munyu kunogona kuunza mhedzisiro yakafanana mumaawa makumi maviri nemana chete.
Iko kuenzana pakati pekuyedzwa kwemunyu wekupfapfaidza uye yakasikwa yemamiriro ekunze nguva inogona kupfupikiswa sezvizvi:
Maawa makumi maviri nemana ekusarerekera munyu kupfapfaidza kuyedzwa ≈ 1 gore rekuratidzwa kwechisikigo.
Maawa makumi maviri nemana eacetic acid munyu wekupfapfaidza ≈ makore matatu ekuratidzwa kwechisikigo.
Maawa makumi maviri nemana emhangura yemunyu-yakawedzera acetic acid munyu wekupfapfaidza ≈ 8 makore ekuratidzwa kwechisikigo.
Nguva yekutumira: Oct-26-2023