Kuora ndiko kuparadzwa kana kuora kwezvinhu kana hunhu hwazvo kunokonzerwa nenharaunda. Kuora kwakawanda kunoitika munzvimbo dzine ngura, dzine zvinhu zvinoparadza nezvinhu zvinoparadza zvakaita seokisijeni, hunyoro, kushanduka kwekushisa uye kusvibiswa kwezvinhu.
Kuora kweCyclic ingura inowanikwa uye inoparadza zvakanyanya mumhepo. Kuora kweCyclic Corrosion pamusoro pezvinhu zvesimbi kunokonzerwa nemaion echloride ari pamusoro pesimbi ye oxidized layer uye layer inodzivirira yekupinda kwesimbi pamusoro pesimbi uye internal metal electrochemical reaction inokonzerwa. Panguva imwe chete, maion echlorine ane simba remvura, riri nyore kunyudzwa mumaburi esimbi, maburi anozadzwa uye anotsiva okisijeni mu oxide layer, maoxide asinganyunguduke kuita ma chloride anonyunguduka, kuitira kuti mamiriro epamusoro apfuure panzvimbo inoshanda.
Kuedza kweCyclic Corrosion imhando yekuedza kwezvakatipoteredza kunonyanya kushandiswa nemidziyo yekuyedza yeCyclic Corrosion kugadzira simulation yekugadzira mamiriro ekunze eCyclic Corrosion kuongorora kuramba kwengura kwezvigadzirwa kana zvinhu zvesimbi. Yakakamurwa muzvikamu zviviri, chimwe chekuyedza kwekuratidzwa kwezvakatipoteredza, chimwe chekuyedza kukurumidza kweCyclic Corrosion.
Kuedzwa kwezvakatipoteredza kweCyclic Corrosion kwakagadzirwa nekushandisa michina yekuedza nzvimbo - Cyclic Corrosion test chamber (Mufananidzo), muhuwandu hwayo hwenzvimbo ine nzira dzekugadzira, zvichikonzera kuti Cyclic Corrosion nharaunda iongorore mhando yeCyclic Corrosion corrosion resistance yechigadzirwa.
Zvinoenzaniswa nenzvimbo yechisikigo, huwandu hwemunyu hwechloride munzvimbo yayo yeCyclic Corrosion, hunogona kuwanda kakawanda kana kuti kakawanda kupfuura huwandu hwenzvimbo yechisikigo yeCyclic Corrosion, saka huwandu hwengura hunowedzerwa zvakanyanya, bvunzo yeCyclic Corrosion pachigadzirwa, nguva yekuwana mhedzisiro inopfupikiswawo zvakanyanya. Sezvakaita munzvimbo yechisikigo yekuratidzwa kwemuenzaniso wechigadzirwa, ngura yacho inogona kutora gore rimwe chete, nepo mukuenzanisa kweCyclic Corrosion nemamiriro ekunze, chero maawa makumi maviri nemana, unogona kuwana mhedzisiro yakafanana.
Kuora kweCyclic Corrosion kwakaedzwa murabhoritari kunogona kukamurwa kuita zvikamu zvina
(1)Bvunzo yeNeutral Cyclic Corrosion (NSS test)inzira yekuedza ngura nekukurumidza yakaonekwa kare uye parizvino ndiyo inonyanya kushandiswa. Inoshandisa 5% sodium chloride saline solution, mhinduro PH value yakagadziriswa mu neutral range (6.5 ~ 7.2) semhinduro yekupfapfaidza. Tembiricha yekuedza inotorwa 35 ℃, chiyero chekugadzirisa zvinodiwa zveCyclic Corrosion mu1 ~ 2ml/80cm / h.
(2)Acetic acid Cyclic Corrosion test (bvunzo yeASS)Inogadzirwa zvichibva pakuyedzwa kweCyclic Corrosion isina kusimba. Inofanira kuwedzera glacial acetic acid mu 5% sodium chloride solution, kuitira kuti PH value yemhinduro iderere kusvika pa3, mhinduro yacho inova acidic, uye kuumbwa kwekupedzisira kweCyclic Corrosion kunochinjwawo kubva paCyclic Corrosion isina kusimba kuenda paacidic. Kuwanda kwayo kwekuora kunokurumidza ka3 kupfuura NSS test.
(3)Munyu wemhangura unowedzera acetic acid. Kuedza kweCyclic Corrosion (CASS test)bvunzo yekukurumidza yeCyclic Corrosion ichangobva kugadzirwa, tembiricha yekuyedza ye50 ℃, munyu une munyu mushoma wemhangura - copper chloride, inokonzera ngura zvakanyanya. Mwero wayo wekuora wakapetwa ka8 pane bvunzo yeNSS.
(4)Kuedza kweCyclic Corrosion Alternatingbvunzo yakazara yeCyclic Corrosion, iyo iri bvunzo yeCyclic Corrosion isina kupindirana pamwe nekuyedzwa kwehunyoro nekupisa nguva dzose. Inonyanya kushandiswa kune zvigadzirwa zvese zvemhando yegomba, kuburikidza nekupinda kwenzvimbo ine hunyoro, kuitira kuti Cyclic Corrosion isangogadzirwa pamusoro pechigadzirwa chete, asiwo mukati mechigadzirwa. Ndiyo chigadzirwa chiri muCyclic Corrosion uye kupisa kwakanyorova mamiriro maviri enharaunda achichinjana, uye pakupedzisira kuongorora hunhu hwemagetsi nehwemakanika hwechigadzirwa chose paine kana pasina shanduko.
Mhedzisiro yebvunzo dzeCyclic Corrosion inowanzo kupihwa muchimiro chequalitative kwete muchimiro chequantitative. Kune nzira ina dzekutonga dzakatarwa.
①nzira yekutonga yekuongororainzvimbo ine ngura uye nzvimbo yese yehuwandu hwehuwandu hwechikamu zvichienderana nenzira yakati yekukamura kuita mazinga akasiyana, kusvika padanho rakati sehwaro hwekutonga kwakakodzera, yakakodzera sampuli dzakati sandara kuti dziongororwe.
②nzira yekuongorora kutongaKana sampuli yaongororwa huremu hwayo isati yasvika uye yapera, verenga huremu hwekurasikirwa kwayo nengura kuti utarise hunhu hwesampuli yekuramba ngura, yakakodzera zvakanyanya kuongororwa kwehunhu hwesimbi yekuramba ngura.
③nzira yekuona chitarisiko chinoparadzainzira yekuongorora hunhu, ndiyo bvunzo yeCyclic Corrosion, kana chigadzirwa chichiburitsa ngura kuti chione muenzaniso, mitemo yezvigadzirwa ndiyo inonyanya kushandiswa munzira iyi.
④nzira yekuongorora nhamba dze data rekuorainopa dhizaini yekuedzwa kwekuora, ongororo yedata rekuora, data rekuora kuti ione nhanho yekuvimba yenzira iyi, iyo inonyanya kushandiswa kuongorora, ngura yehuwandu, kwete kunyanya pakuongorora mhando chaiyo yechigadzirwa.
Kuedzwa kwesimbi isina ngura kuburikidza necyclic corrosion
Bvunzo yeCyclic Corrosion yakagadzirwa mukutanga kwezana remakore rechi20, ndiyo yakashandiswa kwenguva refu ye "corrosion test", zvinhu zvisingapindi ngura zvakanyanya, uye yava bvunzo "yepasi rose". Zvikonzero zvikuru ndeizvi: ① kuchengetedza nguva; ② mutengo wakaderera; ③ inogona kuyedza zvinhu zvakasiyana-siyana; ④ mhedzisiro yacho iri nyore uye yakajeka, inobatsira kugadzirisa gakava rezvekutengeserana.
Muchokwadi, bvunzo yeCyclic Corrosion yesimbi isingatsvi ndiyo inozivikanwa zvakanyanya - bvunzo iyi yeCyclic Corrosion inogona kuitwa maawa mangani? Varapi havafanirwe kunge vasiri vaenzi kumubvunzo uyu.
Vatengesi vezvinhu vanowanzo shandisakusava nehanyakurapwa kanakunatsiridza giredhi rekupukuta pamusoro, nezvimwewo, kuti pave nenguva yekuedza Cyclic Corrosion yesimbi isingatsvi. Zvisinei, chinhu chinonyanya kukosha ndechekuumbwa kwesimbi isingatsvi pachayo, kureva kuti huwandu hwechromium, molybdenum uye nickel.
Kana zvinhu zviviri izvi, chromium nemolybdenum, zvinoita kuti ngura irambe ichikwira uye ngura itange kuoneka. Kuramba ngura uku kunoratidzwa nenzira inonziKuramba Kupidigura Kwakaenzana(PRE) kukosha: PRE = %Cr + 3.3 x %Mo.
Kunyangwe nickel isingawedzere kuramba kwesimbi pakuora kana kupwanyika, inogona kuderedza kumhanya kwekuora mushure mekunge maitiro ekuora atanga. Saka, simbi dzisina kusimba dzine nickel dzinowanzoita zviri nani muCyclic Corrosion tests, uye dzinoora zvishoma pane simbi dzisina kusimba dzine nickel ferritic dzine kuramba kwakafanana ne corrosion equivalents.
Zvishoma: Pa standard 304, neutral Cyclic Corrosion inowanzo kuve pakati pemaawa makumi mana nemasere nemakumi manomwe nemaviri; pa standard 316, neutral Cyclic Corrosion inowanzo kuve pakati pemaawa makumi manomwe nemaviri nemakumi maviri.
Zvinofanira kucherechedzwa kutiiyoKuora kwemhepobvunzo ine zvipingamupinyi zvikuru pakuedza hunhu hwesimbi isingatsvi.Huwandu hwechloride muCyclic Corrosion muCyclic Corrosion test hwakanyanya, hunopfuura zvakanyanya nharaunda chaiyo, saka simbi isingasvibi inogona kuramba ngura munzvimbo chaiyo yekushandisa ine huwandu hwakaderera hwechloride ichakuvadzwawo muCyclic Corrosion test.
Kuedzwa kweCyclic Corrosion kunochinja maitiro ekuora kwesimbi isingatsvi, hakugone kuonekwa sekuyedza kwekukurumidzisa kana kuyedza kwekufananidzira. Mhedzisiro yacho ndeyedivi rimwe chete uye haina hukama hwakafanana nekushanda chaiko kwesimbi isingatsvi iyo inozopedzisira yashandiswa.
Saka tinogona kushandisa Cyclic Corrosion test kuenzanisa kuramba kwesimbi dzakasiyana-siyana, asi bvunzo iyi inongokwanisa kuyera zvinhu zvacho chete. Pakusarudza zvinhu zvesimbi isingatsvi, bvunzo yeCyclic Corrosion yega haiwanzo kupa ruzivo rwakakwana, nekuti hatina kunzwisisa kwakakwana kwekubatana kuripo pakati pemamiriro ebvunzo nenzvimbo chaiyo yekushandisa.
Nechikonzero chimwe chete ichocho, hazvigoneke kufungidzira hupenyu hwechigadzirwa zvichibva chete paCyclic Corrosion test yesampuli yesimbi isina ngura.
Pamusoro pezvo, hazvigoneke kuenzanisa mhando dzakasiyana dzesimbi, semuenzaniso, hatigone kuenzanisa simbi isingatsvedzeri nesimbi yakaputirwa nekabhoni, nekuti nzira dzekuora kwezvinhu zviviri zvakashandiswa mukuyedza dzakasiyana zvikuru, uye hukama huripo pakati pemhedzisiro yebvunzo nenzvimbo chaiyo iyo chigadzirwa chichazopedzisira chashandiswa hachina kufanana.
Nguva yekutumira: Mbudzi-06-2023