Corrosion ndiko kuparadzwa kana kuparara kwezvinhu kana zvivakwa zvazvo zvinokonzerwa nenharaunda.Kuora kwakawanda kunoitika munzvimbo dzemuchadenga, dzine zvinhu zvinoparadza uye zvinopisa zvakaita seokisijeni, mwando, shanduko yetembiricha uye zvinosvibisa.
Cyclic Corrosion inowanzoitika uye inoparadza zvakanyanya mumhepo.Cyclic Corrosion corrosion pamusoro pezvinhu zvesimbi inokonzerwa neiyo chloride ion iri musimbi pamusoro peiyo oxidized layer uye inodzivirira layer yesimbi yepasi pekupinda uye yemukati simbi electrochemical reaction inokonzerwa.Panguva imwecheteyo, chlorine ion ine imwe hydration simba, iri nyore kushambadza mumapores epasi pesimbi, kuputika kwakazara uye kutsiva okisijeni muokisijeni layer, insoluble oxides kuita soluble chlorides, kuitira kuti nyika ifambe. pamusoro pechinhu chinoshanda.
Cyclic Corrosion bvunzo imhando yekuyedza kwezvakatipoteredza kunyanya kushandisa Cyclic Corrosion bvunzo michina kugadzira yekunyepedzera yekunyepedzera yeCyclic Corrosion mamiriro ezvakatipoteredza kuti uongorore kusakara kwezvigadzirwa kana simbi zvinhu.Iyo yakakamurwa kuita mapoka maviri, imwe yeyakasikwa nharaunda bvunzo yekuratidzwa, imwe yacho yekunyepedzera inomhanyisa simulation yeCyclic Corrosion nharaunda bvunzo.
Artificial simulation yeCyclic Corrosion yekuongorora kwezvakatipoteredza ndiko kushandiswa kweimwe vhoriyamu yenzvimbo yekuyedza kamuri - Cyclic Corrosion test chamber (Mufananidzo), muhuwandu hwayo hwenzvimbo nemaitiro ekugadzira, zvichikonzera nharaunda yeCyclic Corrosion kuongorora kunaka kwechigadzirwa Cyclic. Corrosion corrosion resistance.
Iyo inofananidzwa nenzvimbo yechisikigo, iyo munyu yekuisa chloride yeCyclic Corrosion nharaunda, inogona kuva akati wandei kana makumi enguva yakawanda yakasikwa nharaunda Cyclic Corrosion yemukati, kuitira kuti chiyero chekuora chiwedzere zvakanyanya, iyo Cyclic Corrosion bvunzo pa chigadzirwa, nguva yekuwana mhedzisiro zvakare yakapfupikiswa zvakanyanya.Zvakadai semunzvimbo yekuratidzwa yechisikigo yemuenzaniso wechigadzirwa bvunzo, kuve ngura kwayo inogona kutora gore rimwe, nepo muyedzero yekunyepedzera yeCyclic Corrosion mamiriro ezvakatipoteredza, kwenguva yakareba semaawa makumi maviri nemana, unogona kuwana mhedzisiro yakafanana.
Laboratory inoteedzeredzwa Cyclic Corrosion inogona kukamurwa muzvikamu zvina
(1)Neutral Cyclic Corrosion Test (NSS bvunzo)inzira yekumhanyisa corrosion yekuyedza iyo yaionekwa kwekutanga uye ndiyo inonyanya kushandiswa.Inoshandisa 5% sodium chloride saline solution, mhinduro PH kukosha yakagadziriswa muutera (6.5 ~ 7.2) semhinduro yekupfapfaidza.Iyo tembiricha yekuyedza inotorwa 35 ℃, chiyero chekugadzirisa cheCyclic Corrosion zvinodiwa mu1 ~ 2ml/80cm / h.
(2)Acetic acid Cyclic Corrosion bvunzo (ASS bvunzo)inogadzirwa pahwaro hwekusarerekera Cyclic Corrosion bvunzo.Iko kuwedzera imwe glacial acetic acid mu5% sodium chloride solution, kuti iyo PH kukosha kwemushonga ideredze kusvika pa3, mhinduro inova acidic, uye kuumbwa kwekupedzisira kweCyclic Corrosion kunoshandurwawo kubva kune neutral Cyclic Corrosion kuita acidic. .Kuora kwayo kuri kuita katatu nekukurumidza kupfuura bvunzo dzeNSS.
(3)Mhangura munyu yakawedzera acetic acid Cyclic Corrosion bvunzo (CASS bvunzo)ichangobva kugadzirwa yekune dzimwe nyika nekukurumidza Cyclic Corrosion bvunzo, tembiricha yekuyedza ye50 ℃, munyu munyu ine munyu mushoma wemhangura - copper chloride, inokonzeresa ngura.Kuora kwayo kunosvika kasere pane yebvunzo yeNSS.
(4)Alternating Cyclic Corrosion testndeye yakazara Cyclic Corrosion bvunzo, inova isina kwayakarerekera Cyclic Corrosion bvunzo pamwe nekugara hunyoro uye kuyedza kupisa.Iyo inonyanya kushandiswa kune cavity-mhando yakazara zvigadzirwa, kuburikidza nekupinda kwenzvimbo ine hunyoro, kuitira kuti Cyclic Corrosion isangogadzirwa pamusoro pechigadzirwa, asiwo mukati mechigadzirwa.Icho chigadzirwa chiri muCyclic Corrosion uye hunyoro kupisa mamiriro maviri ezvakatipoteredza zvakachinjana, uye pakupedzisira ongorora magetsi uye emagetsi zvimiro zvechigadzirwa chose chine kana pasina shanduko.
Mhedzisiro yebvunzo yeCyclic Corrosion bvunzo inowanzopihwa mumhando kwete yehuwandu fomu.Pane nzira ina dzakananga dzekutonga.
①rating kutonga nzirainzvimbo yekuora uye nharaunda yese yereshiyo yeperesenti zvinoenderana neimwe nzira yekukamura kuita nhanho dzinoverengeka, kune imwe nhanho seyakakodzera kutonga hwaro, inokodzera masampuli akatsetseka kuti aongororwe.
②kuyera nzira yekutongairi kuburikidza nehuremu hwesample isati yatanga uye mushure meyedzo yekuyera kuyerwa nzira, kuverenga huremu hwekurasikirwa kwekuora kutonga kunaka kweiyo sample corrosion kuramba, inonyanya kukodzera simbi yekudzivirira kusimba kwemhando yekuongorora.
③corrosive chitarisiko kutsunga nziraimhando yekutsidzira nzira, ndeye Cyclic Corrosion bvunzo, ingave chigadzirwa ichiburitsa corrosion chiitiko kuona sampuli, zvakajairwa zvigadzirwa zviyero zvinonyanya kushandiswa mune iyi nzira.
④corrosion data statistical analysis methodinopa dhizaini yekuodza bvunzo, kuongororwa kwecorrosion data, corrosion data kuona iyo yekuvimbika nhanho yenzira, iyo inonyanya kushandiswa kuongorora, corrosion yehuwandu, kwete kunyanya kune yakatarwa chigadzirwa chemhando kutonga.
Cyclic Corrosion test yesimbi isina tsvina
Cyclic Corrosion bvunzo yakagadzirwa mukutanga kwezana ramakore rechimakumi maviri, ndiyo yakarebesa kushandiswa kwe "corrosion bvunzo", yakanyanya kusaora-inodzivirira zvinhu zvemushandisi kufarira, yave bvunzo "yepasirese".Zvikonzero zvikuru ndezvizvi zvinotevera: ① kuchengetedza nguva;② mutengo wakaderera;③ inogona kuedza zvakasiyana-siyana zvezvinhu;④ mhedzisiro yacho iri nyore uye yakajeka, inofarira kugadzirisa kwemakakatanwa ekutengesa.
Mukuita, iyo Cyclic Corrosion bvunzo yesimbi isina tsvina ndiyo inonyanya kuzivikanwa - mangani maawa angakwanisa bvunzo iyi Cyclic Corrosion?Vafambisi havafanirwe kunge vari vaenzi kumubvunzo uyu.
Vatengesi vezvinhu vanowanzoshandisapassivationkurapwa kanakunatsiridza giredhi rekupenya kwepamusoro, nezvimwewo, kuvandudza iyo Cyclic Corrosion test time yesimbi isina tsvina.Zvisinei, chinonyanya kukoshesa chinotaridza kuumbwa kwesimbi isina tsvina pachayo, kureva zviri mukati mechromium, molybdenum uye nickel.
Kukwirisa zviri mukati mezvinhu zviviri izvi, chromium nemolybdenum, ndiko kusimba kwekuita ngura kunodiwa kudzivirira gomba uye kukoromoka kunotanga kuoneka.Uku kushora kwegora kunoratidzwa maererano nezvinonziPitting Resistance Yakaenzana(PRE) kukosha: PRE = %Cr + 3.3 x % Mo.
Kunyangwe nickel isinga wedzere kuramba kwesimbi kugomba uye kukoromoka, inogona kudzikamisa mwero wekuora mushure mekunge maitiro ekuora atanga.Nickel-ine austenitic stainless simbi saka dzinoita zvirinani muCyclic Corrosion bvunzo, uye inoora zvishoma zvakanyanya pane yakaderera-nickel ferritic simbi isina tsvina ine kupikisa kwakafanana kupinza corrosion yakaenzana.
Trivia: Pachiyero 304, kwaakarerekera Cyclic Corrosion kazhinji ari pakati pe48 ne72 maawa;yeyakajairwa 316, kwaakarerekera Cyclic Corrosion kazhinji iri pakati pe72 ne120 maawa.
Zvinofanira kucherechedzwa kutitheCyclic Corrosionbvunzo ine zvipingamupinyi zvakakura paunenge uchiyedza zvimiro zvesimbi isina tsvina.Iyo chloride yemukati yeCyclic Corrosion muCyclic Corrosion bvunzo yakakwira zvakanyanya, inopfuura kure nharaunda chaiyo, saka simbi isina tsvina inokwanisa kuramba kukora munzvimbo chaiyo yekushandisa ine yakaderera kwazvo chloride yemukati inozosvibiswawo muCyclic Corrosion bvunzo. .
Cyclic Corrosion bvunzo inoshandura maitiro ekuora kwesimbi isina tsvina, haigone kutorwa seyekukurumidza bvunzo kana yekunyepedzera kuyedza.Mhedzisiro yacho ine divi rimwe chete uye haina hukama hwakaenzana nekuita chaiko kwesimbi isina tsvina inozoiswa mukushandiswa.
Saka isu tinogona kushandisa iyo Cyclic Corrosion bvunzo kuenzanisa kushora kwemhando dzakasiyana dzesimbi isina tsvina, asi bvunzo iyi inongokwanisa kuyera zvinhu.Paunenge uchisarudza zvinhu zvesimbi zvisina tsvina zvakananga, iyo Cyclic Corrosion bvunzo yega haiwanzo kupa ruzivo rwakakwana, nekuti isu hatina kunzwisisa kwakakwana kwekubatana pakati pemamiriro ekuedzwa uye chaiyo yekushandisa nharaunda.
Nechikonzero chimwe chete, hazvigoneke kufungidzira hupenyu hwesevhisi yechigadzirwa chakavakirwa chete paCyclic Corrosion bvunzo yesimbi isina simbi sampuli.
Uye zvakare, hazvigoneke kuenzanisa pakati pemhando dzakasiyana dzesimbi, semuenzaniso, isu hatigone kuenzanisa simbi isina tsvina neyakavharwa kabhoni simbi, nekuti nzira dzekuora dzezvinhu zviviri zvakashandiswa mukuedzwa kwakasiyana kwazvo, uye kuwirirana pakati peiyo. bvunzo mhinduro uye nharaunda chaiyo iyo chigadzirwa chichapedzisira chashandiswa haina kufanana.
Nguva yekutumira: Nov-06-2023