Pitting corrosion ntawm stainless hlau phaj 2205

Pitting corrosion ntawm stainless hlau phaj 2205

Lub pitting corrosion ntawm stainless hlau phaj 2205 tseem hu ua pitting corrosion thiab qhov me me corrosion. Pitting corrosion ntawm stainless hlau phaj 2205 tshwm sim nyob rau hauv tej corrosive media. Nws feem ntau tshwm sim nyob rau hauv cov kev daws teeb meem uas muaj halogen anions, ntawm cov tshuaj chloride thiab bromide muaj zog corrosion ua hauj lwm thiab yog ib qho ntawm feem ntau corrosion media rau stainless hlau.

Pitting feem ntau tshwm sim ntawm cov zaj duab xis passivation ntawm daim hlau stainless, thiab corrosion kuj ntawm stainless hlau phaj 2205 yog txiav txim siab los ntawm cov yeeb yaj kiab tiv thaiv passivation. Txawm hais tias qhov dav ntawm pitting corrosion yog me me, thaum nws tshwm sim, nws tus nqi corrosion yuav ceev heev, thiab nyob rau hauv cov xwm txheej hnyav, nws tuaj yeem ua rau cov khoom perforation. Tsis tas li ntawd, feem ntau, pitting corrosion muaj peev xwm ua rau intergranular corrosion thiab kev nyuaj siab corrosion.

Muaj ob lub laj thawj tseem ceeb vim li cas stainless hlau phaj 2205 txo nws txoj kev tiv thaiv rau cov yas deformation thiab tawg hauv qhov kub thiab txias. Ua ntej, qhov nce hauv qhov kub thiab txias ua rau txo qis hauv interatomic bonding peev xwm, txhim khu kev sib txuas, thiab yooj yim rov qab thiab recrystallization; Los ntawm metallographic foundations, muaj ib theem thib ob aggregation thiab kev loj hlob, nrog rau kev hloov ntawm ib tug metastable qauv mus rau ib tug khov kho; Tag nrho cov no tuaj yeem ua rau lub phaj hlau tsis muaj zog.

Qhov thib ob, qhov nce ntawm qhov kub thiab txias yog qhov tsim nyog rau kev tsim ntawm cov ciam teb diffusion deformation lossis grain ciam swb; Thaum qhov kub thiab txias tshaj tus nqi tshwj xeeb, lub zog intergranular yuav ua rau tsis muaj zog rau hauv qab lub zog intragranular, uas yuav ua rau lub zog tag nrho cov yas deformation tsis muaj zog thiab ua rau cov pob txha tawg. Los ntawm microstructure ntawm stainless hlau daim hlau, lub austenite matrix muaj siab thermal zog tshaj ferrite matrix. Qhov no yog vim lub ntsej muag nruab nrab cubic lattice ntawm austenite yog cov compact, nrog ib tug tsawg diffusion tus nqi, ua rau nws nyuaj rau recrystallize. Nyob rau tib lub sijhawm, nws kuj ua rau qeeb ntawm qhov sib xyaw ntawm theem ob, ua rau nws nyuaj rau soften ntawm qhov kub thiab txias thiab muaj lub zog thermal zoo heev.

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