Kuumbwa kweMetal Passivation uye Ukobvu hwePassivation Firimu

Passivation inotsanangurwa sekugadzirwa kwechidziviriro chakatetepa kwazvo pamusoro pechinhu chesimbi pasi pe oxidizing mamiriro, anowanikwa neakasimba anodic polarization, kudzivisa kuparara.Mamwe masimbi kana alloys anogadzira iri nyore inhibiting layer pane activation inogoneka kana pasi peiyo inodic polarization isina kusimba, nekudaro ichidzikisa chiyero chekuora.Zvinoenderana netsanangudzo yepassivation, iyi mamiriro haawire pasi pepassivation.

Mamiriro emufirimu wepassivation akatetepa zvakanyanya, ane chiyero cheukobvu kubva pa1 kusvika ku10 nanometers.Kuonekwa kwehydrogen mune passivation yakaonda firimu inoratidza kuti passivation firimu inogona kunge iri hydroxide kana hydrate.Iron (Fe) yakaoma kuumba firimu rekufambisa pasi pemamiriro ezvinhu ekuora;inongoitika munzvimbo dzakanyanya oxidizing uye pasi peanodic polarization kune yakakwirira mikana.Kusiyana neizvi, chromium (Cr) inogona kuumba yakagadzikana, yakakora, uye inodzivirira passivation firimu kunyangwe munzvimbo dzakapfava oxidizing.Mune iron-based alloys ine chromium, kana chromium yemukati ichipfuura 12%, inonzi simbi isina tsvina.Simbi isina tsvina inokwanisa kuchengetedza nzvimbo yakapfuura muminyungurudzo ine aqueous ine huwandu hwemhepo.Nickel (Ni), kana ichienzaniswa nesimbi, haina kungoita zvirinani zvemuchina (kusanganisira kusimba kwepamusoro-tembiricha) asiwo inoratidza kushomeka kwekuora mune zvese zvisiri-oxidizing.

Kuumbwa kweMetal Passivation uye Ukobvu hwePassivation Firimu

Passivation inotsanangurwa sekugadzirwa kwechidziviriro chakatetepa kwazvo pamusoro pechinhu chesimbi pasi pe oxidizing mamiriro, anowanikwa neakasimba anodic polarization, kudzivisa kuparara.Mamwe masimbi kana alloys anogadzira iri nyore inhibiting layer pane activation inogoneka kana pasi peiyo inodic polarization isina kusimba, nekudaro ichidzikisa chiyero chekuora.Zvinoenderana netsanangudzo yepassivation, iyi mamiriro haawire pasi pepassivation.

Mamiriro emufirimu wepassivation akatetepa zvakanyanya, ane chiyero cheukobvu kubva pa1 kusvika ku10 nanometers.Kuonekwa kwehydrogen mune passivation yakaonda firimu inoratidza kuti passivation firimu inogona kunge iri hydroxide kana hydrate.Iron (Fe) yakaoma kuumba firimu rekufambisa pasi pemamiriro ezvinhu ekuora;inongoitika munzvimbo dzakanyanya oxidizing uye pasi peanodic polarization kune yakakwirira mikana.Kusiyana neizvi, chromium (Cr) inogona kuumba yakagadzikana, yakakora, uye inodzivirira passivation firimu kunyangwe munzvimbo dzakapfava oxidizing.Mune iron-based alloys ine chromium, kana chromium yemukati ichipfuura 12%, inonzi simbi isina tsvina.Simbi isina tsvina inokwanisa kuchengetedza nzvimbo yakapfuura muminyungurudzo ine aqueous ine huwandu hwemhepo.Nickel (Ni), kana ichienzaniswa nesimbi, haingove iine zvinhu zviri nani zvemuchina (kusanganisira kusimba kwepamusoro-tembiricha) asiwo inoratidza kushomeka kwekuora munzvimbo dzese dzisiri oxidizing uye oxidizing.Kana iyo nickel yemukati mune iron ichipfuura 8%, inodzikamisa chiso-chepakati cubic chimiro che austenite, ichiwedzera kuwedzera passivation kugona uye kunatsiridza dziviriro yekuora.Naizvozvo, chromium uye nickel akakosha alloying zvinhu musimbi uye oxidizing nharaunda.Kana iyo nickel yemukati mune iron ichipfuura 8%, inodzikamisa chiso-chepakati cubic chimiro che austenite, ichiwedzera kuwedzera passivation kugona uye kunatsiridza dziviriro yekuora.Naizvozvo, chromium uye nickel zvakakosha alloying zvinhu musimbi.