Pitting corrosion kuj tseem hu ua qhov me me corrosion, pitting lossis pitting.
Nws yog ib daim ntawv ntawm corrosion kev puas tsuaj nyob rau hauv uas feem ntau ntawm cov saum npoo ntawmHlau UaTsis corrode lossis corrodes me ntsis me ntsis, tab sis corrosion qhov tshwm nyob hauv cov chaw hauv zos thiab nthuav dav. Qee tus pits muaj nyob rau hauv kev rho tawm, thaum lwm tus yog txuas nrog thiab zoo li muaj ntxhib saum npoo. Etch qhov tuaj yeem loj lossis me me, tab sis feem ntau me dua, raws li qhov loj me, qhov tob ntawm lub qhov taub ntawm lub cheeb ntawm qhov etch lub qhov. Pitting yog ib qho ntawm cov qauv kev phom sij hauv cov qauv duplex stuple. Pitting qhov yog feem ntau pib lub vev xaib ntawm kev ntxhov siab corrosion thiab corrosion nkees nkees.
Stainless hlaudeg passivation zaj duab xis vim tias muaj qhov tsis xws luag nyob rau hauv cov chaw no, yog li ntawd kev puas tsuaj loj heev, kev ua si ntawm kev ua kom nrawm, thiab tom qab ntawd ua a Tus naj npawb ntawm rab koob-zoo li lub qhov.
Stainless hlau, ntxiv rau lwm cov hlau uas cia siab raupassivationRau corrosion tsis kam, hauv kev daws teeb meem uas muaj ib qho anion (chloride, bromide, hypochlorite, lossis thiosulfate ions). Ntev npaum li cov muaj peev xwm corrosion (lossis lub peev xwm thov thaum lub sijhawm Anodic Polarization) tshaj qhov pitting muaj peev xwm eb, pitting tuaj yeem tshwm sim. Lub tshuab ntawm pitting corrosion ntawm ob tus hlau stellex yog tib yam li lwm tus hlau tsis xeb.
Hlau KhoNrog oxidising media, nws corrosion tus nqi tshaj li qhov tseem tsis tau kho ua ntej ib qho kev txo qis tseem ceeb hauv kev ua rog. Lub tshuab hla kev hla tuaj yeem siv tau los piav txog cov yeeb yaj kiab nyias kev xav, uas yog,passivationYog vim yog lub luag haujlwm ntawm cov hlau thiab oxidising media, lub luag haujlwm ntawm cov hlau saum npoo los tsim cov khoom siv hlau heev, tuaj yeem sib xyaw nrog cov hlau sib dhos ua yeeb yaj kiab. Daim yeeb yaj kiab no mus rau theem sib txawv tshwm sim, feem ntau cov pa oxygen thiab hlau sib txuas. Nws plays lub luag haujlwm ntawm cov hlau thiab cov xov xwm corrosion kiag li los ntawm kev tiv thaiv cov hlau thiab corrosion nres los ua lub xeev passivolving los tiv thaiv cov nyhuv ntawm corrosion.
Lub Sijhawm Post: Dec-27-2023