Site na mmepe ngwa ngwa nke akụ na ụba ọha na eze, nnukwu oke osimiri na akụ mmiri bara ụba amalitela ịbanye n'ọhịa nke ọhụụ ndị mmadụ.Oke osimiri bụ nnukwu ụlọ akụ akụ, nke nwere akụ dị ndụ, akụrụngwa ike na akụrụngwa ike oke osimiri.Mmepe na ojiji nke akụrụngwa mmiri enweghị ikewapụ na nyocha na mmepe nke ihe pụrụ iche nke mmiri, na esemokwu na iyi uwe na gburugburu mmiri siri ike bụ isi okwu na-egbochi itinye ngwa nke mmiri na mmepe akụrụngwa mmiri.Mụta corrosion na iyi omume nke 316L na 2205 igwe anaghị agba nchara n'okpuru ọnọdụ mmiri mmiri abụọ a na-ejikarị: mmiri mmiri corrosion iyi na nchedo cathodic, ma jiri ụzọ nnwale dị iche iche dị ka XRD, metallography, electrochemical test na corrosion na iyi synergy iji nyochaa microstructure. A na-enyocha usoro mgbanwe site na akụkụ, mmetụta nke mmiri mmiri na-amị amị na corrosion na iyi ihe nke igwe anaghị agba nchara. A na-enyocha nsonaazụ nyocha dị ka ndị a:
(1) Ọnụ ọgụgụ iyi nke 316L n'okpuru ibu dị elu dị ntakịrị karịa ọnụ ọgụgụ iyi n'okpuru obere ibu.XRD na metallographic analysis na-egosi na 316L na-enweta mgbanwe martensitic n'oge mmiri na-amị amị, na arụmọrụ mgbanwe ya bụ ihe dịka 60% ma ọ bụ karịa;N'iji atụnyere ọnụego mgbanwe martensite n'okpuru ọnọdụ mmiri mmiri abụọ, a chọpụtara na corrosion mmiri na-egbochi mgbanwe nke martensite.
(2) A na-eji nyocha polarization potentiodynamic na ụzọ impedance electrochemical iji mụọ mmetụta nke mgbanwe microstructural 316L na omume corrosion.Nsonaazụ gosiri na mgbanwe nke martensitic na-emetụta njirimara na nkwụsi ike nke ihe nkiri ahụ na-agafe agafe n'elu igwe anaghị agba nchara, na-eduga na mmebi nke igwe anaghị agba nchara.Nguzogide corrosion adịghị ike;Nyocha electrochemical impedance (EIS) erutekwara a yiri nkwubi okwu, na eme martensite na untransformed austenite ụdị microscopic eletriki njikọ njikọ, nke n'aka na-agbanwe na electrochemical omume nke igwe anaghị agba nchara.
(3) Ihe efu nke316L igwe anaghị agba ncharan'okpuru mmiri mmiri na-agụnye esemokwu dị ọcha na iyi ihe efu (W0), mmetụta synergistic nke corrosion na wear (S') na mmetụta synergistic nke eyi na corrosion (S'), ebe mgbanwe mgbanwe nke martensitic na-emetụta mmekọrịta dị n'etiti ihe efu nke ihe onwunwe. A kọwara akụkụ nke ọ bụla.
(4) The corrosion na iyi omume nke2205A na-amụ nchara nchara n'okpuru ọnọdụ mmiri mmiri abụọ.Nsonaazụ gosiri na: nha nha nke 2205 dual-phase steel n'okpuru ibu dị elu dị ntakịrị, na iyi mmiri na-amị amị na-eme ka usoro σ na-eme n'elu igwe okpukpu abụọ.Mgbanwe microstructural dị ka nrụrụ, mgbakasị ahụ na ngbanwe lattice na-eme ka nkwụsị nke nchara nke okpukpu abụọ na-eyi;ma e jiri ya tụnyere 316L, 2205 dual-phase steel nwere obere uwe na-eyi na nguzogide ka mma.
(5) A na-eji ebe a na-arụ ọrụ na-arụ ọrụ electrochemical iji nwalee njirimara electrochemical nke ihe mkpuchi nke igwe okpukpu abụọ.Mgbe ejiji na-eyi na mmiri oké osimiri, ikike nke corrosion nke onwe ya2205ígwè okpukpu abụọ na-ebelata ma njupụta dị ugbu a mụbara;site na usoro ule electrochemical impedance test (EIS) kwubiri na uru nguzogide nke iyi elu nke igwe duplex na-ebelata na nguzogide corrosion nke oke osimiri na-ebelata;usoro σ nke a na-emepụta site na nchara nke igwe duplex site na mmiri mmiri na-ebelata ihe Cr na Mo gburugburu ferrite na austenite , na-eme ka ígwè duplex dị mfe na corrosion nke oké osimiri, na olulu mmiri na-adịkarị mfe ịmalite na mpaghara ndị a nwere nkwarụ.
(6) Ihe efu nke2205 duplex ígwètumadi sitere na esemokwu dị ọcha na mfu ihe, na-aza ihe dịka 80% ruo 90% nke mfu niile.E jiri ya tụnyere 316L igwe anaghị agba nchara, ihe mfu nke akụkụ ọ bụla nke duplex ígwè dị ukwuu karịa nke 316L.Obere.
Na nchịkọta, enwere ike ikwubi na 2205 dual-phase steel nwere nguzogide corrosion ka mma na gburugburu ebe obibi mmiri ma dị mma maka ngwa ngwa na corrosion mmiri na iyi gburugburu.
Oge nzipu: Dec-04-2023