KUKORA KWEZVINHU ZVINHU

Simbi isina tsvina ialloy yesimbi ine inokwana 10.5% chromium. Iyi chromium inobvumira kuumbwa kweakatetepa oxide layer pamusoro pesimbi, inozivikanwawo se "passive layer" uye inopa simbi isina tsvina kupenya kwayo kwakasiyana.
Passive coatings seizvi anobatsira kudzivirira kukora kwenzvimbo dzesimbi uye nekudaro anovandudza corrosion resistance nekuwedzera huwandu hwechromium musimbi isina tsvina. Nekubatanidza zvinhu zvakaita senickel uye molybdenum, akasiyana-siyana simbi alloys anogona kugadzirwa, achipa iyo simbi inonyanya kubatsira zvinhu, senge yakagadziridzwa kuumbwa uye yakakwirira corrosion kuramba.
Zvigadzirwa zvesimbi zvisina tsvina zvinogadzirwa nevagadziri vepombi dzesimbi hazvizoparare mumamiriro e "zvakasikwa" kana nzvimbo dzemvura, saka, kucheka, kunyura, countertops, uye pani dzakagadzirwa nesimbi Imba isina tsvina inowanzoshandiswa. Zvisinei, zvakakosha kuziva kuti chinyorwa ichi "chisina ngura" uye kwete "chisina tsvina" uye naizvozvo mune dzimwe nguva kuparara kuchaitika.

Chii chingaita kuti simbi isina tsvina iparare?
Corrosion, mukutsanangura kwayo kwakapfava, ikemikari inoitika inokanganisa kuvimbika kwesimbi. Kana simbi ikasangana ne electrolyte, yakaita semvura, okisijeni, tsvina, kana imwe simbi, iyi mhando yemakemikari reaction inogona kugadzirwa.
Simbi dzinorasikirwa nemaerekitironi mushure mekuita kwekemikari uye nekudaro inopera simba. Inobva yabatwa nemamwe magadzirirwo emakemikari emunguva yemberi, ayo anogona kugadzira zviitiko zvakaita sekuora, kutsemuka, uye maburi mumidziyo kusvika simbi yapera simba.
Corrosion inogonawo kuzvisimudzira, zvichireva kuti kana yangotanga zvinogona kunetsa kumira. Izvi zvinogona kuita kuti simbi iite brittle kana ngura yasvika pane imwe nhanho uye inogona kudonha.

AKASIYANA MAFOMU OKUNGA MUNA STAINLESS simbi
Uniform Corrosion
Rudzi rwakawanda rwekuora runogona kukanganisa simbi isina tsvina uye mamwe masimbi inonzi uniform corrosion. Iyi ndiyo "yunifomu" kupararira kwekuora pamusoro pepamusoro pezvinhu.
Sezvineiwo, inozivikanwawo seimwe yeakanyanya "bhenign" maitiro ekuora, kunyangwe anogona kuvhara nzvimbo dzakakura dzesimbi. Chokwadi, maitiro ayo pakuita kwechinyorwa anoyerwa sezvo achigona kusimbiswa zviri nyore.

Pitting Corrosion
Pitting corrosion inogona kunetsa kufanotaura, kuziva, nekusiyanisa, zvichireva kuti inowanzoonekwa seimwe yenzira dzine ngozi dzekuora.
Iri imhando yakasarudzika yecorrosion umo nzvimbo diki yegomba inogadzirwa neinodc kana cathodic nzvimbo. Kana gomba iri ranyatsosimbiswa, rinogona "kuzvivaka" pariri kuitira kuti kagomba kadiki kanokwanisa kuumba mhango inogona kuve yemhando dzakasiyana uye hukuru hwakasiyana. Pitting corrosion kazhinji "inotama" ichidzika uye inogona kuva nengozi zvakanyanya nekuti ikasagadziriswa, kunyangwe nzvimbo diki ikakanganisika, inogona kukonzera kusashanda kwesimbi.

Crevice Corrosion
Crevice corrosion imhando yekuora kwenzvimbo kunobva kunharaunda ine microscopic umo matunhu maviri esimbi ane maion concentration akasiyana.
Munzvimbo dzakaita semawachi, mabhaudhi, uye majoini asina traffic shoma inobvumira acidic agents kupinda, iyi fomu yekuora ichaitika. Iyo yakaderedzwa huwandu hweokisijeni inokonzerwa nekushaikwa kwekutenderera, saka iyo passive process haina kuitika. Iyo pH balance yeaperture inobva yakanganiswa uye inokonzeresa kusaenzana pakati penzvimbo iyi neyekunze. Muchokwadi, izvi zvinokonzeresa mazinga ekuora uye zvinogona kuwedzeredzwa nekudziya kwakaderera. Kushandisa dhizaini yakakodzera yekubatana kuderedza njodzi yekupwanya kwegora ndiyo imwe nzira yekudzivirira iyi fomu yekuora.

Electrochemical Corrosion
Kana akanyudzwa mumushonga unoparadza kana kuti conductive, simbi mbiri dzakasiyana dze electrochemically dzinosangana, dzichigadzira kuyerera kwemaerekitironi pakati pawo. Nekuda kwekuti simbi ine kusimba kushoma ndiyo anode, iyo simbi ine kushomeka kwekushomeka inowanzo batwa zvakanyanya. Kuora uku kunonzi galvanic corrosion kana bimetallic corrosion.