Imiterere ya Metal Passivation hamwe nubunini bwa firime ya Passivation

Passivation isobanurwa nkugukora urwego ruto cyane rurinda hejuru yicyuma mugihe cya okiside, bigerwaho na polarike ikomeye ya anodic, kugirango ibuze ruswa.Ibyuma bimwe na bimwe bivangavanga biteza imbere uburyo bworoshye bwo kubuza gukora cyangwa munsi ya anodic polarisiyasi nkeya, bityo bikagabanya umuvuduko wa ruswa.Ukurikije ibisobanuro bya passivation, iki kibazo ntabwo kiri munsi ya passivation.

Imiterere ya firime ya passivation ni nto cyane, hamwe no gupima ubunini buri hagati ya nanometero 1 na 10.Kumenya hydrogène muri passivation yoroheje yerekana ko firime ya passivation ishobora kuba hydroxide cyangwa hydrate.Icyuma (Fe) biragoye gukora firime ya passivation mubihe bisanzwe byangirika;bibaho gusa mubidukikije bya okiside cyane kandi munsi ya anodic polarisiyasi kubishoboka byinshi.Ibinyuranye, chromium (Cr) irashobora gukora firime itajegajega, yuzuye, kandi irinda pasivisiyo ndetse no mubidukikije byoroheje.Mu byuma bishingiye ku byuma birimo chromium, iyo chromium irenze 12%, yitwa ibyuma bitagira umwanda.Ibyuma bitagira umwanda birashobora kugumya gutwarwa mubisubizo byamazi byinshi birimo umwuka mwinshi.Nickel (Ni), ugereranije nicyuma, ntabwo ifite imiterere yubukanishi gusa (harimo nubushyuhe bwo hejuru) ariko inagaragaza uburyo bwiza bwo kurwanya ruswa muri non-okiside

Imiterere ya Metal Passivation hamwe nubunini bwa firime ya Passivation

Passivation isobanurwa nkugukora urwego ruto cyane rurinda hejuru yicyuma mugihe cya okiside, bigerwaho na polarike ikomeye ya anodic, kugirango ibuze ruswa.Ibyuma bimwe na bimwe bivangavanga biteza imbere uburyo bworoshye bwo kubuza gukora cyangwa munsi ya anodic polarisiyasi nkeya, bityo bikagabanya umuvuduko wa ruswa.Ukurikije ibisobanuro bya passivation, iki kibazo ntabwo kiri munsi ya passivation.

Imiterere ya firime ya passivation ni nto cyane, hamwe no gupima ubunini buri hagati ya nanometero 1 na 10.Kumenya hydrogène muri passivation yoroheje yerekana ko firime ya passivation ishobora kuba hydroxide cyangwa hydrate.Icyuma (Fe) biragoye gukora firime ya passivation mubihe bisanzwe byangirika;bibaho gusa mubidukikije bya okiside cyane kandi munsi ya anodic polarisiyasi kubishoboka byinshi.Ibinyuranye, chromium (Cr) irashobora gukora firime itajegajega, yuzuye, kandi irinda pasivisiyo ndetse no mubidukikije byoroheje.Mu byuma bishingiye ku byuma birimo chromium, iyo chromium irenze 12%, yitwa ibyuma bitagira umwanda.Ibyuma bitagira umuyonga birashobora kugumya guhagarara mubisubizo byamazi byinshi birimo umwuka mwinshi.Nickel (Ni), ugereranije nicyuma, ntabwo ifite imiterere yubukanishi gusa (harimo nubushyuhe bwo hejuru) ariko kandi irerekana uburyo bwiza bwo kurwanya ruswa haba mubidafite okiside ndetse na okiside.Iyo nikel iri muri fer irenze 8%, ihindura isura yububiko bushingiye kumaso ya austenite, bikarushaho kongera ubushobozi bwa passivation no kunoza kurinda ruswa.Kubwibyo, chromium na nikel nibyingenzi byingenzi bivanga mubyuma.naho ibidukikije bya okiside.Iyo nikel iri muri fer irenze 8%, ihindura isura yububiko bushingiye kumaso ya austenite, bikarushaho kongera ubushobozi bwa passivation no kunoza kurinda ruswa.Kubwibyo, chromium na nikel nibintu byingenzi bivanga ibyuma.