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20MnTiB simbi ndiyo inonyanya kushandiswa-yakasimba bhoti zvinhu zvemabhiriji ekugadzirwa kwesimbi munyika yangu, uye kuita kwayo kwakakosha zvikuru pakushanda kwakachengeteka kwemabhiriji. Zvichienderana nekuferefetwa kwemamiriro ekunze emuchadenga muChongqing, chidzidzo ichi chakagadzira chigadziriso chekuora chinoteedzera mamiriro ekunze ekunyorova eChongqing, uye kuita bvunzo yekusagadzikana kwemamiriro ekunze eChongqing. Mhedzisiro yekushisa, pH kukosha uye simulated corrosion solution concentration pahutano hwekuora mwoyo maitiro e20MnTiB high-simba mabhoti akadzidzwa.
20MnTiB simbi ndiyo inonyanya kushandiswa yakakwirira-yakasimba bhaudhi zvinhu zvesimbi mabhiriji ekugadzira mabhiriji munyika yangu, uye kuita kwayo kunokosha zvikuru pakushanda kwakachengeteka kwemabhiriji.Li et al.1 yakaedza zvimiro zve20MnTiB simbi inowanzo shandiswa mugiredhi 10.9 yakakwirira-simba mabhaudhi mune yakakwirira tembiricha renji ye20 ~ 700 ℃, uye yakawana iyo stress-strain curve, goho simba, kusimba kwesimba, Yechidiki modulus, uye kureba.uye coefficient yekuwedzera.Zhang et al.2, Hu nevamwe.3, zvichingodaro, kuburikidza nekuongororwa kwemakemikari ekuumbwa, kuyedza zvivakwa zvemuchina, kuongorora microstructure, macroscopic uye microscopic kuongororwa kwetambo yepamusoro, uye mhedzisiro inoratidza kuti chikonzero chikuru chekutsemuka kwemabhaudhi akasimba ane chekuita nekuremara kweshinda, uye kuitika kwehurema hweshinda Huru hwekushushikana, kutsemuka tip kushushikana uye kuvhurika-mhepo kunokonzeresa corrosion mamiriro ese.
High-simba mabhoti emabhiriji esimbi anowanzo shandiswa kwenguva yakareba munzvimbo ine hunyoro.Zvinhu zvakaita sehunyoro hwepamusoro, tembiricha yepamusoro, uye sedimentation uye kutorwa kwezvinhu zvinokuvadza munharaunda zvinogona kukonzera kuparara kwezvivako zvesimbi nyore nyore.Corrosion inogona kukonzera-yakasimba-simba bhoti yemuchinjikwa-chikamu kurasikirwa, zvichiita kuti pave nekuparara kwepamusoro uye kuenderera mberi kwekukanganisa uye kuenderera mberi kwehupenyu huzhinji. -simba mabhoti uye kunyange kuita kuti iparadze.Kusvika ikozvino, kune zvidzidzo zvakawanda pamusoro pemigumisiro yezvakatipoteredza corrosion pamusoro pekushungurudzika corrosion kushanda kwezvinhu.Catar et al4 vakaongorora kushungurudzika kwekuora maitiro e magnesium alloys ane zvakasiyana-siyana zvealuminium mukati mune acidic, alkaline uye neutral environments nekunonoka strain rate test (SSRT.Abdel5 corrosion) maitiro e-electroy corrosion akadzidza maitiro e-electroy corrosion mumakemikari e-stress. 3.5% NaCl mhinduro muhupo hwehuwandu hwakasiyana hwe sulfide ions.Aghion et al.6 vakaongorora corrosion performance ye die-cast magnesium alloy MRI230D mu 3.5% NaCl mhinduro kuburikidza nekunyudza test, salt spray test, potentiodynamic polarization analysis uye SSRT.Zhangnsite maitiro e-stress corrocrt et al-sssssssstress et alro7. matekiniki ekuongorora, uye akawana mhedzisiro ye chloride ions paiyo static corrosion maitiro emartensitic simbi pakamuri tembiricha.Chen et al.8 vakaongorora maitiro ekushushikana kwecorrosion uye kuputika mashini yeX70 simbi musimulated dhaka regungwa rine SRB pakudziya kwakasiyana neSSRT. 1Ni14Mn5Mo2N austenitic Stainless steel. Zvigumisiro zvinoratidza kuti tembiricha iri pakati pe35 ~ 65 ℃ haina mhedzisiro yakakosha pakushushikana kwekuora maitiro kwesimbi isina tsvina.Lu et al.10 yakaongorora kunonoka kuputsika kwemaitiro emhando dzakasiyana-siyana dzesimba remagiredhi nemutoro wakafa wakanonoka kuputsika bvunzo uye SSRT. Zvinokurudzirwa kuti simba rekusimba re20MnTiB simbi uye 35VB simbi yakakwirira-yakasimba mabhoti inofanira kudzorwa pa1040-1190MPa. zvakatipoteredza, nepo iyo chaiyo inoshandiswa nharaunda ye-high-simba mabhoti yakanyanya kuoma uye ine zvakawanda zvinofurira zvinhu, zvakadai sepH kukosha kwebhoti.Ananya et al.11 yakadzidza mhedzisiro yezvakatipoteredza parameters uye zvinhu mune inoora svikiro pane corrosion uye kusagadzikana ngura kuputika kwe duplex Stainless steels.Sunada et al.12 yakaita kamuri tembiricha stress ngura cracking bvunzo paSUS304 simbi mune aqueous mhinduro dzine H2SO4 (0-5.5 kmol/m-3) uye NaCl (0-4.5 kmol/m-3) Migumisiro H2SO4 uye NaCl pamusoro ngura marudzi SUS304 simbi zvakadzidzwawo. s kudzvinyirirwa uye nguva yekuora pamusoro pekunetseka kwekuora mwoyo kweA516 kudzvinyirira mudziyo wesimbi.Kushandisa NS4 mhinduro semvura yepasi simulating solution, Ibrahim et al.14 yakaongorora mhedzisiro yezvakatipoteredza parameters senge bicarbonate ion (HCO) concentration, pH uye tembiricha pastress corrosion cracking yeAPI-X100 pipeline simbi mushure mekusvuura coating.Shan et al.15 yakadzidza mutemo wekusiyana kwekushungurudzika kwegorosi kuparara kwekunzwa kwe austenitic simbi isina tsvina 00Cr18Ni10 nekushisa pasi pemamiriro akasiyana-siyana ekushisa (30 ~ 250 ℃) pasi pemamiriro emvura yakasviba yepakati mune simulated marasha-ku-hydrogen chirimwa neSSRT. uye SSRT.Zhao17 yakadzidza zvinokonzerwa nepH, SO42-, Cl-1 pahutano hwekushungurudzika corrosion maitiro eGH4080A alloy ne SSRT.Zvigumisiro zvinoratidza kuti kuderera kwepH kukosha, kunowedzera kushushikana kwekuora kwekutya kweGH4080A alloy.Iine stress stress corrosion medium uye haina kunzwisiswa neCl-2 pane zvidzidzo zvishoma, SO, SO. mhedzisiro yekuora kwezvakatipoteredza pa20MnTiB simbi yakakwirira-simba mabhaudhi.
Kuti uwane zvikonzero zvekukundikana kwemabhaudhi akasimba anoshandiswa mumabhiriji, munyori akaita zvidzidzo zvakatevedzana.Zviratidzo zvemabhoti epamusoro-soro zvakasarudzwa, uye zvikonzero zvekukundikana kwezvienzaniso izvi zvakakurukurwa kubva pamaonero ekugadzirwa kwemakemikari, kuputsika microscopic morphology, metallographic structure uye mechanical properties analysis19, 20 phephrsional in the recent investigations in Bangxicord in the recent tsvakurudzo yemakore 20. Stress corrosion experiments, electrochemical corrosion experiments uye corrosion kuneta kuyedza mabhaudhi akasimba-simba muChongqing akaitwa. macroscopic uye microscopic ongororo, uye pamusoro corrosion zvigadzirwa.
Chongqing iri kumaodzanyemba kwakadziva kumadokero kweChina, kumusoro kweRwizi rwaYangtze, uye ine humid subtropical monsoon climate.The gore negore avhareji tembiricha iri 16-18°C, avhareji yegore hunyoro hunyoro huzhinji huzhinji 70-80%, maawa ekupenya kwezuva kwepagore maawa 1000-1400, uye kupenya kwezuva-chikamu che35 chete%.
Zvinoenderana nemishumo ine chekuita nekupenya kwezuva uye ambient tembiricha muChongqing kubva 2015 kusvika 2018, avhareji tembiricha yemazuva ese muChongqing yakadzikira kusvika 17°C uye yakakwira kusvika 23°C.Tembiricha yepamusoro-soro pabhiriji reChaotianmen Bridge muChongqing inogona kusvika 50°C °C21,22. Naizvozvo, tembiricha yebvunzo yecorrosion test yakaiswa pa25°C uye 50°C.
Iyo pH kukosha kweiyo yakateedzerwa corrosion solution inotarisisa huwandu hweH +, asi hazvireve kuti iyo yakaderera pH kukosha, iyo iri nyore kuora kunoitika. Mhedzisiro yepH pamhedzisiro ichasiyana kune akasiyana zvinhu uye mhinduro.Kuitira kuti udzidze zvirinani maitiro eakateedzerwa corrosion solution pane kushushikana corrosion kuita kwe-high-simba mabhaudhi, iyo pH ye5 corrosion uye 5 corrosion yekuedza. pamwe chete netsvagiridzo yemabhuku23 uye huwandu hwepH hwemvura inonaya pagore muChongqing.2010 kusvika 2018.
Iyo yakakwira iyo yekumisikidzwa kweyakatemerwa corrosion solution, iyo yakawanda yeion zvirimo mune yakateedzerwa corrosion solution, uye yakanyanya kupesvedzera pazvinhu zvenyama.Kuitira kudzidza mabatiro eiyo simulated corrosion solution yekuisa pamusoro pekushungurudzika kwecorrosion yemabhaudhi akasimba, artificial laboratori yakamhanyisa corrosion bvunzo yakagadziriswa, uye mhinduro yakateedzerwa corrosion yakagadziriswa. rosion solution concentration (1 ×), 20 × yepakutanga simulated corrosion solution concentration (20 ×) uye 200 × yepakutanga simulated corrosion solution concentration (200 ×).
Mamiriro ekunze ane tembiricha ye25 ℃, pH kukosha kwe5.5, uye kusungirirwa kweiyo yekutanga simulated corrosion solution ndiyo iri padyo nemamiriro chaiwo ekushandiswa kwepamusoro-simba mabhaudhi emabhiriji.Zvisinei, kuitira kuti ikurumidze kuonda bvunzo maitiro, mamiriro ekuyedza ane tembiricha ye25 °C, pH ye5.5 lated0 corrosion yakasetwa senge boka rekutanga rakaiswa 5.5 × corrosion corrosion. migumisiro yekushisa, kusungirirwa kana pH kukosha kweiyo yakafananidzirwa corrosion solution pamusoro pekunetseka kwekuora kwekuita kwepamusoro-simba mabhoti kwakaongororwa maererano, zvimwe zvinhu zvakaramba zvisina kuchinjwa, izvo zvakashandiswa seyero yekuedza yeboka rekutonga rekutarisa.
Zvinoenderana ne2010-2018 atmospheric environment quality briefing yakabudiswa neChongqing Municipal Bureau of Ecology and Environment, uye tichitaura nezvezvikamu zvekunaya kwemvura zvakashumwa muZhang24 nemamwe mabhuku akashumwa muChongqing, imwe yakateedzerwa corrosion solution yakavakirwa pakuwedzera kuwanda kweSO42- yakagadzirwa. rosion solution inoratidzwa muTafura 1:
Mushonga unofananidzwa wekuora unogadzirwa nekemikari ion concentration yekuenzanisa nzira uchishandisa analytical reagents uye mvura yakasvibiswa.Iyo pH kukosha kweiyo yakagadziriswa corrosion solution yakagadziridzwa neyakarurama pH mita, nitric acid solution uye sodium hydroxide solution.
Kuti utevedzere mamiriro ekunze ane hunyoro muChongqing, muyedzo wekupfapfaidza munyu wakanyatsogadziridzwa uye wakagadzirwa25.Sezvinoratidzwa muMufananidzo 1, midziyo yekuedza ine masisitimu maviri: salt spray system uye lighting system.Iyo salt spray system ndiro basa guru remidziyo yekuyedza, iyo ine chikamu chekutonga, chikamu chekupfapfaidza uye chikamu chekupinza. Basa remupumburu wemupupiritsi wemunyu. yetembiricha yekuyera zvinhu, iyo inonzwa tembiricha mukamuri yekuyedza.Chikamu chekutonga chinoumbwa nemicrocomputer, inobatanidza chikamu chekupfapfaidza uye chikamu chekupinza kudzora maitiro ese ekuyedza.Sitimu yekuvhenekesa inoiswa mukamuri yemunyu yekupurudzira test chamber kutevedzera chiedza chezuva.Sitimu yekuvhenekesa ine infrared mwenje uye nguva controller.Panguva imwe cheteyo, kutarisisa tembiricha yekupurudzira tembiricha inoiswa mukamuri yemunyu chaiyo inoiswa mutembiricha yemunyu.
Stress corrosion samples pasi pemutoro unogara wakagadziriswa maererano neNACE TM0177-2005 (Laboratory Testing yeSulfide Stress Cracking uye Stress Corrosion Cracking Resistance of Metals in a H2S Environment).Stress corrosion specimens yakatanga kucheneswa neacetone uye ultrasonic mechanical cleanings newaini yakaomeswa newaini yakaomeswa, ndokuisa mafuta akaomeswa mu ohydrated akaomeswa. kamuri yekuyedza yemunyu wekupfapfaidza test mudziyo kuti utevedzere mamiriro ekuora munzvimbo ine hunyoro yemamiriro ekunze eChongqing. Zvinoenderana neyakajairwa NACETM0177-2005 uye munyu wekupfapfaidza test standard GB/T 10,125-2012, iyo inogara ichiremerwa kushushikana kuora nguva yekuongorora muchidzidzo ichi yakatemerwa zvakafanana kuti ive 1568 corrosion mamiriro pasi peMTensile corrosion pasi peyedzo yakasiyana-siyana yakaitwa pasi peMTensile corrosion. TS-810 universal tensile yekuyedza muchina, uye yavo michina zvimiro uye fracture corrosion morphology yakaongororwa.
Mufananidzo 1 unoratidza macro- uye micro-morphology ye-surface corrosion ye-high-simba bolt stress stress corrosion specimens pasi pemamiriro akasiyana-siyana ekuora.2 uye 3 maererano.
Macroscopic morphology of stress corrosion specimens of 20MnTiB high-simba bolts pasi pezvakasiyana-siyana zvakafananidzwa nemararamiro ekuora: (a) hapana kuora;(b) 1 nguva;(c) 20 ×;(d) 200 ×;(e) pH3.5;(f) pH 7.5;(g) 50°C.
Micromorphology yezvigadzirwa zvekuora zve 20MnTiB yakakwirira-simba mabhoti munzvimbo dzakasiyana-siyana dzakafananidzwa dzakasvibiswa (100 ×): (a) 1 nguva;(b) 20 ×;(c) 200 ×;(d) pH3.5;(e) pH7 .5;(f) 50°C.
Inogona kuonekwa kubva mumufananidzo 2a kuti pamusoro peiyo uncorroded high-simba bolt specimen inoratidzira inopenya metallic luster pasina corrosion yakajeka.Zvisinei, pasi pemamiriro ekutanga akafananidzirwa corrosion solution (Fig. 2b) , uye iyo yakafananidzirwa corrosion solution yakanga isina simba pamusoro pemuenzaniso.Zvinhu zvezvinhu zvine maitiro mashoma.Zvisinei, pasi pemamiriro e20 × yepakutanga simulated corrosion solution concentration (Fig. 2c), pamusoro pepamusoro-simba bolt specimen yakavharwa zvachose nehuwandu hwakawanda hwezvigadzirwa zve tan corrosion uye zvishoma zvebrown-red corrosion.chigadzirwa, hapana pachena metallic luster yakawanikwa, uye pakanga pane chidimbu chebrown-blate pasi pechigadzirwa chebrown-blate pasi pechinhu chiduku. 200 × yepakutanga simulated corrosion solution concentration (Fig. 2d), pamusoro peiyo sampuli yakavharwa zvachose nebrown corrosion products, uye brown-black corrosion products inowanikwa mune dzimwe nzvimbo.
Sezvo pH yakaderera kusvika ku3.5 (Fig. 2e), zvigadzirwa zve-tan-colored corrosion zvaive zvakanyanya pamusoro pemasampuli, uye zvimwe zvezvigadzirwa zvekuora zvakange zvabviswa.
Mufananidzo 2g unoratidza kuti sezvo kutonhora kunowedzera kusvika ku50 ° C, zvinyorwa zvebrown-red corrosion zvigadzirwa pamusoro pemuenzaniso zvinoderera zvakanyanya, nepo zvigadzirwa zvebrown corrosion zvinopenya zvakavhara pamusoro pesample munzvimbo yakakura.Iyo corrosion product layer yakasununguka, uye zvimwe zvigadzirwa zvebrown-black zvinobviswa.
Sezvinoratidzwa muMufananidzo 3, pasi pemamiriro akasiyana-siyana ekuora, zvigadzirwa zvekuora zviri pamusoro pe20MnTiB yakakwirira-simba bhoti yekusimbisa corrosion specimens zviri pachena kuti dzakaderedzwa, uye kukora kwegora kunowedzera nekuwedzera kwehuwandu hwekugadzirisa kwekugadzirisa kwekugadzirisa. muzvikamu zviviri: iyo yekunze yakatsetseka yezvigadzirwa zvekuora inogoverwa zvakaenzana, asi nhamba huru yekutsemuka inooneka;mukati memukati isumbu rakasununguka rezvigadzirwa zvehutu.Pasi pemamiriro e20 × yepakutanga simulated corrosion solution concentration (Fig. 3b), iyo corrosion layer iri pamusoro pemuenzaniso inogona kugoverwa muzvikamu zvitatu: kunze kwekunze kunonyanya kuparadzirwa zvigadziridzo zvemasumbu, izvo zvakasununguka uye zvinodzivirira, uye hazvina basa rakanaka;Iyo yepakati yepakati ndeye yunifomu corrosion chigadzirwa layer, asi pane kuputika kuri pachena, uye iyo ion yekuora inogona kupfuura nepakati uye inobvisa substrate;mukati memukati ndeye dense corrosion product layer pasina kuputika kwakajeka, iyo ine simba rakanaka rekudzivirira pane substrate.Pasi pemamiriro e200 × yepakutanga simulated corrosion solution concentration (Fig. 3c), iyo corrosion layer iri pamusoro peiyo sampuli inogona kugoverwa muzvikamu zvitatu: iyo yekunze yakatsetseka ndeye yakaonda uye yakafanana corrosion product layer;chikamu chepakati chinonyanya kuita petal-shaped uye flake-shaped corrosion Iyo yemukati layer ndeye dense corrosion product layer isina akatsemuka uye maburi, ayo ane yakanaka kudzivirira pa substrate.
Inogona kuonekwa kubva kuFig. 3d kuti mumamiriro ekufananidzwa kwekuora kwepH 3.5, kune nhamba huru yezvigadzirwa zve flocculent kana tsono-yakafanana netsono pamusoro peiyo 20MnTiB yakakwirira-simba bolt specimen.Zvinofungidzirwa kuti izvi zvigadzirwa zvekuora zvinonyanya γ-FeOOH ine chidimbu che γ-FeOOH uye chidimbu chakajeka che αro-FeOH uye αro-FeOH iri pachena. mitswe.
Zvinogona kuonekwa kubva Fig. 3f kuti kana tembiricha yakawedzera kusvika 50 ° C, hapana pachena dense yemukati ngura layer yakawanikwa mune ngura layer chimiro, zvichiratidza kuti pakanga paine mikaha pakati pematanho ekuora pa50 ° C, izvo zvakaita kuti substrate isafukidzwe zvachose nezvigadzirwa zvekuora.Inopa dziviriro kubva pakuwedzera substrate corrosion maitiro.
Iwo emakanika mabhaudhi epamusoro-simba mabhaudhi pasi pekugara achiremerwa kushungurudza corrosion munzvimbo dzakasiyana dzinoparadza anoratidzwa muTafura 2:
Zvinogona kuonekwa kubva paTable 2 kuti ma mechanical properties e20MnTiB high-simba bolt specimens zvichiri kusangana nezvinodiwa zvakajairwa mushure mekuoma-kunyorova cycle yakamhanyisa corrosion test munzvimbo dzakasiyana dzakafananidzwa dzakaita ngura, asi pane kumwe kukuvadzwa kana kuchienzaniswa neasina kuora. 00 × kusungirirwa kweiyo yakagadziriswa mhinduro, kurebesa kwemuenzaniso kwakaderera zvakanyanya.Iyo mechanical properties yakafanana pazvikamu zve 20 × uye 200 × yepakutanga simulated corrosion solutions.Apo pH kukosha kweiyo yakagadziriswa corrosion solution yakadonha kusvika ku3.5, simba rekugadzirisa uye elongation yemasampuli yakaderera yakaderera. padyo zvakanyanya neiyo standard value.
The fracture morphologies ye20MnTiB high-simba bolt stress corrosion specimens pasi pemamiriro akasiyana-siyana ekuora anoratidzwa muMufananidzo 4, iyo macro-morphology yekutsemuka, iyo fiber zone iri pakati pekutyoka, micro-morphological lip ye shear interface, uye pamusoro pemuenzaniso.
Macroscopic uye microscopic fracture morphologies ye20MnTiB yakakwirira-simba bolt mienzaniso munzvimbo dzakasiyana-siyana dzakafananidzwa dzakasvibiswa (500 ×): (a) hapana kuora;(b) 1 nguva;(c) 20 ×;(d) 200 ×;(e) pH3.5;(f) pH7.5;(g) 50°C.
Zvinogona kuonekwa kubva mumufananidzo 4 kuti kuputsika kwe20MnTiB yakakwirira-simba bolt stress corrosion specimen pasi pezvakasiyana-siyana zvakafananidzirwa corrosion environments zvinopa chimiro chakafanana nekapu-cone fracture.Kuenzaniswa neiyo isina corrod specimen (Fig. 4a), iyo yepakati nzvimbo yefiber area cracking idiki., iyo shear lip nzvimbo yakakura.Izvi zvinoratidza kuti mechanical properties yezvinyorwa zvakanyanya kukuvadzwa mushure mekuora.Nekuwedzera kwekufananidzirwa kwekugadzirisa corrosion solution, makomba ari munzvimbo yefiber iri pakati pekuputsika akawedzera, uye pachena kusvuura seams kwakaonekwa.Apo iyo yekuisa pfungwa yakawedzera kusvika ku20 nguva yepakutanga yakafananidzwa nehuturu hwekugadzirisa, sampuli yakaonekwa uye yakaonekwa pane iyo corrosion solution, iyo yakaonekwa pane corrosion solution. dzaive dzakawanda dzecorrosion products pamusoro.sample.
Inotaridzirwa kubva kuMufananidzo 3d kuti kune kuputika kwakajeka mumucheka wekuora pamusoro pemuenzaniso, iyo isina simba rakanaka rekudzivirira pamatrix.Mune inofananidzwa corrosion solution yepH 3.5 (Mufananidzo 4e), nzvimbo yemuenzaniso yakasvibiswa zvakanyanya, uye nzvimbo yepakati yefiber zviri pachena kuti iduku., Kune nhamba yakawanda yezvisina kukwana kubvarura seams pakati pe fiber area.Nekuwedzera kwepH kukosha kweiyo yakafananidzirwa corrosion solution, nzvimbo yekubvarura munzvimbo yefiber iri pakati pekuputsika inoderera, gomba rinoderera zvishoma nezvishoma, uye gomba rakadzika rinodererawo zvishoma nezvishoma.
Apo tembiricha yakawedzera kusvika ku50 ° C (Fig. 4g), iyo shear lip nzvimbo yekutsemuka kwemuenzaniso ndiyo yakakura, makomba ari pakati pefiber nzvimbo akawedzera zvakanyanya, uye gomba rakadzika zvakare rakawedzera, uye kuwirirana pakati peiyo shear lip edge uye sampuli yepamusoro yakawedzera.Zvigadzirwa zveCorrosion nemakomba zvakawedzera, izvo zvakasimbisa kudzika maitiro e substrate corrosion inoratidzwa muFig. 3f.
Iyo pH kukosha kweiyo corrosion solution ichakonzera kumwe kukuvadza kune mechanical properties ye20MnTiB high-simba mabhoti, asi mhedzisiro yacho haina kukosha.Mumushonga wekuora we pH 3.5, nhamba huru ye flocculent kana tsono-yakafanana corrosion zvigadzirwa zvinogoverwa pamusoro pemuenzaniso, uye iyo corrosion, iyo iyo corrosion yekudzivirira kune ganda rakajeka rine ganda rakajeka rine ganda rakajeka. nhamba yakawanda yezvigadzirwa zvekuora mu microscopic morphology yemuenzaniso fracture.Izvi zvinoratidza kuti kukwanisa kwemuenzaniso kupikisa deformation nekunze kwesimba kunonyanya kuderedzwa munzvimbo ine acidic, uye dhigirii yekushungurudzika kwekuora kwemaitiro kunowedzera zvakanyanya.
Mhedzisiro yepakutanga yakafananidzwa necorrosion yakange iine zvishoma pamichina yemagetsi e-high-simba mabhoti samples, asi sezvo kusungirirwa kweiyo yakafananidzirwa corrosion solution yakawedzera kusvika ku20 nguva yepakutanga yakafananidzwa nekugadzirisa kugadzirisa, maitiro emagetsi emasampuli akakuvadzwa zvakanyanya, uye pakanga pane kuparara kwakajeka mukuputsika microstructure.makomba, kuputika kwechipiri uye yakawanda yezvigadzirwa zvekuora.Apo iyo yakatemerwa corrosion solution concentration yakawedzera kubva ku20 times kusvika ku200 times of the original simulated corrosion solution concentration, mhedzisiro ye corrosion solution concentration pa mechanical properties of the material was weak.
Kana tembiricha yecorrosion inofananidzwa iri 25 ℃, simba regoho uye kusimba kwekusimba kwe20MnTiB yakakwirira-simba mabhaudhi emuenzaniso haashanduke zvakanyanya kana achienzaniswa neasina kuora.Zvisinei, pasi peyakafananidzirwa corrosion nharaunda tembiricha ye50 ° C, kusimba kwesimba uye kurebesa kwechikamu cheiyo muromo kwakaderedzwa zvakanyanya, iyo chiyero cheiyo chikamu chakaderera zvakanyanya kuderera. , uye paiva nemadimples ari nechepakati faibha area.Ichinyanya kuwedzera, gomba kudzika kwakawedzera, ngura zvigadzirwa uye ngura makomba akawedzera.Izvi zvinoratidza kuti tembiricha synergistic ngura nharaunda ane simba guru pamusoro mechanical ehupfumi pamusoro-simba mabhaudhi, izvo zvisiri pachena pakamuri tembiricha, asi zvinonyanya kukosha kana tembiricha inosvika 50 °C.
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