Ukugqwala kungukubhujiswa noma ukuwohloka kwezinto zokwakha noma izakhiwo zazo ezibangelwa imvelo. Ukugcwala okuningi kwenzeka ezindaweni ezisemkhathini, okuqukethe izakhi eziwonakalisiwe kanye nezinto ezilonakalisayo ezinjenge-oksijini, umswakama, izinguquko zokushisa kanye nokungcola.
Ukugqwala kwe-cyclic kungukulimazeka komkhathi okuvamile futhi okulimazayo. Ukugqwala kokugqwala kwe-cyclic ebusweni bezinto zensimbi kungenxa yama-chloride ions okuqukethwe endaweni yensimbi ye-oxidized yongqimba kanye nongqimba oluvikelayo lokungena ngaphakathi kwe-electron Ngasikhathi sinye, ama-chlorine ion aqukethe amandla athile we-hydration, okulula ukufakwa kuma-pores we-weretal, imifantu yagcwala futhi athathe umoya we-oxygen engxenyeni encibilikisiwe, ukuze kube nokuPhenulwa kwesimo sobuso obusebenzayo.
Ukuhlolwa kwe-Cryclic Corrosion kuwuhlobo lokuhlolwa kwemvelo ikakhulukazi usebenzisa imishini yokuhlolwa kwe-cyclic corrosion ukudala ukumbumbuluzwa kwezemvelo ze-cyclic ukubhucuka imvelo izimo zokuhlola ukumelana nemikhiqizo noma izinto zensimbi. Ihlukaniswe izigaba ezimbili, eyodwa yokuhlolwa kokuvezwa kwemvelo kwemvelo, enye yokulingiswa okusheshisiwe kwe-cyclic tororic imvelo test.
Ukulingisa kokufakelwa kokuhlolwa kwezemvelo kweCyclic Soricial ukusetshenziswa kwevolumu ethile yemishini yokuhlola isikhala - I-Cyclic Corrosion Test Chamber (Umdwebo), ngenani lendawo yalo ngezindlela zokuvuselelwa, okuholela endaweni yokubhuka kweCyclic to
Iqhathaniswa nemvelo yemvelo, ukugcwaliswa kwesawoti kwe-chloride yemvelo yayo yokugqwala ye-cyclic, kungahle kube nezikhathi eziningana zemvelo yemvelo yemvelo, ukuze izilinganiso zokugqwala zikhuphuke kakhulu, isikhathi sokuthola imiphumela sincishiswe kakhulu. Njengasendaweni yokuvezwa kwendalo yemvelo yokuhlolwa kwesampula yomkhiqizo, ukuba ukugcwala kwayo kungathatha unyaka ongu-1, ngenkathi ekulinganisweni kwezimo zobuntu be-cyclic ukubhucuka imvelo, isikhathi eside njengamahora angama-24, ungathola imiphumela efanayo.
I-Laboratory Relived Corlic Corrision ingahlukaniswa izigaba ezine
(1)Ukuhlolwa kwe-Neutral Cyclic Corrision (NSS)kuyindlela yokuhlola ukuthuthuka okusheshayo evele ekuqaleni futhi njengamanje iyona esetshenziswa kakhulu. Isebenzisa isixazululo se-5% sodine saline soline, isixazululo senani le-PH lilungiswe ebangeni elingathathi hlangothi (6.5 ~ 7.2) njengesixazululo sokufafaza. Izinga lokushisa lokuhlola lithathwa ama-35 ℃, izinga lokukhokha lezidingo zokugqwala kwe-cyclic in 1 ~ 2ml / 80cm / h.
(2)I-Acetic Acid Cyclic Corrosion Test (Test)yathuthukiswa ngesisekelo sokuhlolwa okungathathi hlangothi kwe-cyclic corrosion. Kungukufaka i-glacial acetic acid ku-5% sodium chloride solution, ukuze ivelu yekhambi incishiswe ibe yi-3, ikhambi liba acidic, futhi ukwakheka kokugcina kwe-crorosion croric nakho kuguqulwe ekugculweni okungathathi hlangothi ku-acidic. Izinga layo lokukhulisa licishe libe izikhathi ezi-3 ngokushesha kunokuhlolwa kwe-NSS.
(3)Usawoti we-Copper asheshe acelwa i-cyclic terosion test (ukuhlolwa kwe-cass)Uvivinyo olusha olusanda kuthuthukiswa lwangaphandle lweCryClic Cryclic Cryclic Trouder, izivikelo ezingama-50 ℃, ikhambi likasawoti elinenani elincane likasawoti wethusi - i-chloride yethusi, ukugqwala okunamandla kakhulu. Izinga layo lokukhulisa licishe libe izikhathi eziyi-8 zokuhlolwa kwe-NSS.
(4)Ukushintshana Ukuhlolwa Kwe-Cryclic CorrosionIngabe ukuhlolwa okuphelele kokugqwala kwe-cyclic, okuyinto empeleni ukungathathi hlangothi kwe-crorosion test plus i-njalo umswakama kanye nokuhlolwa kokushisa. Isetshenziselwa ikakhulukazi imikhiqizo yonke ye-cavity-hlobo, ngokungena kwesimo somswakama, ukuze ukugqwala kwe-cyclic kungakhiqizwa ebusweni bomkhiqizo, kodwa futhi ngaphakathi komkhiqizo. Kungumkhiqizo ku-Cryclic Corrision kanye nokushisa okunomswakama izimo ezimbili zemvelo ngokuhlukile, futhi ekugcineni zihlole izakhiwo zikagesi nezemishini zomkhiqizo wonke onemikhiqizo noma ngaphandle kwezinguquko.
Imiphumela yokuhlolwa kokuhlolwa kokugqwala kweCyclic ngokuvamile inikezwa ku-Qualitative kunokuba ifomu elilinganiselwe. Kunezindlela ezine ezahlukahlukene zokwahlulela.
①Ukulinganisa indlela yokwahlulelayindawo yokuqinisa kanye nendawo ephelele yesilinganiso samaphesenti ngokuya ngendlela ethile yokwahlukanisa emazingeni athile, ezingeni elithile lesisekelo njengesahlulelo esifanelekile, ilungele amasampula afulethini ukuze ihlolwe.
②Isilinganiso sendlela yokwahlulelaNgokwesisindo sesampula ngaphambi nangemva kwendlela yokuhlola ukuthuthuka, ukubala isisindo sokulahleka kokugqwala ukwahlulela ikhwalithi yokuphikiswa kwekhwalithi yesampula, ikakhulukazi ukuqinisekiswa kwekhwalithi yensimbi.
③Indlela yokuzibonakalisa yokuzibonakalisaIngabe indlela yokuzimisela efanelekile, kungukuhlolwa kokugqwala kweCyclic, noma ngabe uMkhiqizo ukhiqiza umkhathi wokugqwala ukuthola isampula, amazinga omkhiqizo ajwayelekile asetshenziswa kakhulu kule ndlela.
④Indlela yokuhlaziya yedatha ye-CororicalInikeza ukwakheka kwezivivinyo zokugqwala, ukuhlaziya idatha yokugqwala, imininingwane yokugqwala ukuthola izinga lokuzethemba lendlela, elisetshenziselwa ukugcwala kwezibalo, kunokuba lithole isinqumo esithile sekhwalithi yomkhiqizo.
Ukuhlolwa kokugqwala kwe-cyclic kwensimbi engenasici
Ukuhlolwa kokugqwala kwe-cyclic kwasungulwa ekuqaleni kwamashumi amabili amashumi amabili, kungukusebenzisa okude kakhulu kwe- "Corrolusion Test", ukuthandwa ngumsebenzisi olwa nokugqwala, sekungukuhlolwa "kwendawo yonke". Izizathu eziphambili zimi ngokulandelayo: ① ukusindisa isikhathi isikhathi; ② Izindleko eziphansi; Ungahlola izinto ezahlukahlukene; Imiphumela ilula futhi icacile, iyathandeka ekuxazululeni izingxabano zezentengiso.
Ekusebenzeni, ukuhlolwa kokugqwala kwe-cyclic kwensimbi engenasisekelo kungukuthi kwamukelwa kabanzi - ingakanani amahora amaningi wokuqina? Ochwepheshe akufanele babe bangaziwa kulo mbuzo.
Abathengisi bezinto ezibonakalayo bavame ukusetshenziswaukwedlulisaukwelashwa nomaThuthukisa ibanga lokupholisa indawo, njll. Kodwa-ke, isici esinqumayo kunazo zonke sokunquma ukwakheka kwensimbi engenasici uqobo, okungukuthi okuqukethwe kwe-chromium, i-molybdenum ne-nickel.
Lapho kukhuphuka okuqukethwe kwezinto ezimbili, i-chromium kanye ne-molybdenum, amandla aqine ukusebenza okudingekayo ukumelana nokugqwala okukhohlisayo kanye nokuqina kwe-crevice okuqala ukuvela. Lokhu kumelana nokukhulisa kuvezwa ngokuya ngokuthiwaUkumelana nokuphamba okulinganayo(Pre) inani: pre = =% CR + 3.3 x% mo.
Yize i-nickel ingakhuphuli ukumelana kwensimbi ku-corriting and crevice ukugqwala, kunganciphisa ngempumelelo izinga lokugqwala ngemuva kokuthi inqubo yokugqwala isiqalile. Ama-autenitic-aqukethe ama-auntenitic stainless ama-autenitic athambekele ekwenzeni kangcono kakhulu ekuhlolweni kokugqwala kwe-cyclic, futhi ahlanganiswe kakhulu kunensimbi engenazicking flerritic yensimbi engenamkhawulo ngokumelana okufanayo nokuphikisana okufanayo nokulingana okufanayo nokulingana okufanayo kokulingana okufanayo kokulingana okufanayo kokulingana okufanayo kokulingana okufana
I-TRIVIA: Okwejwayelekile engama-304, ukugcwala okungathathi hlangothi kuvame phakathi kwamahora angama-48 kuya kwangama-72; Okwejwayelekile 316, ukugcwala okungathathi hlangothi kuvame phakathi kwamahora angama-72 kuya kwangama-120.
Kufanele kuqashelwe ukuthile khasiUkugqwala kwe-cyclicUkuhlolwa kunezithiyo ezinkulu lapho uvivinya izakhiwo zensimbi engagqwali.Okuqukethwe kwe-chloride kokuqina kwe-cyclic ekuhlolweni kwe-cyclic cororiosion kuphezulu kakhulu, kudlula kudlula imvelo yangempela, ngakho-ke insimbi engenasici engamelana nokuqukethwe okuyisisekelo kwe-chloride enokuqukethwe okuphansi kakhulu kuyovunyelwa kakhulu ekuhlolweni kwe-cycliic.
Ukuhlolwa kokugqwala kweCyclic kushintsha indlela yokuhlanza yensimbi engenasici, akunakubhekwa njengokuhlolwa okusheshisiwe noma ukuhlolwa kokulingisa. Imiphumela iyinhlanganisela eyodwa futhi ayinabo ubudlelwano obulinganayo nokusebenza kwangempela kwensimbi engenasici ekugcineni okusetshenzisiwe.
Ngakho-ke singasebenzisa isivivinyo sokugqwala kweCyclic ukuqhathanisa ukumelana nokugqwala kwezinhlobo ezahlukene zensimbi engenasici, kepha lolu vivinyo lukwazi ukukala lokho okuqukethwe. Lapho ukhetha izinto ezingagqwali zensimbi ngokuqondile, isivivinyo sokugqwala kwe-cyclic sodwa kuphela asivame ukuhlinzeka ngolwazi olwanele, ngoba asinakho ukuqonda okwanele kokuxhumana phakathi kwezimo zokuhlola kanye nemvelo yangempela yesicelo.
Ngesizathu esifanayo, akunakwenzeka ukulinganisa impilo yenkonzo yomkhiqizo esekelwe kuphela ekuhlolweni kokugqwala kwe-cyclic kwesampula yensimbi engenasici.
Ngaphezu kwalokho, akunakwenzeka ukwenza ukuqhathanisa phakathi kwezinhlobo ezahlukene zensimbi, ngokwesibonelo, asikwazi ukuqhathanisa insimbi engagqwali ngensimbi emibili esetshenzisiwe ehlukile, ngoba imishini yokugqwala yalezi zinto zokwenza izivivinyo ihluke kakhulu, futhi indalo yangempela lapho umkhiqizo uzogcina khona ukuthi asetshenziswa.
Isikhathi sePosi: Nov-06-2023