Ngesikhathi sokuphatha, ukuhlanganisa, ukushisela, ukuhlolwa kwe-welding seam, kanye nokucutshungulwa kwamapuleti e-liner angaphakathi, izinto zokusebenza, kanye nezinsiza zamathangi ensimbi engagqwali, ukungcola okuhlukahlukene okufana namabala kawoyela, imihuzuko, ukugqwala, ukungcola, ukungcola kwensimbi okuncibilika kancane. , upende, i-welding slag, ne-splatter yethulwa.Lezi zinto zithinta ikhwalithi engaphezulu yensimbi engagqwali, zonakalisa ifilimu yayo yokudlula, zinciphise ukumelana nokugqwala, futhi ziyenze ibe lula emithonjeni yabezindaba egqwalayo emikhiqizweni yamakhemikhali ethuthwa kamuva, okuholela emigodini, ukugqwala kwe-intergranular, ngisho nokuqhekeka kokugqwala kwengcindezi.
Amathangi ensimbi engagqwali, ngenxa yokuthwala amakhemikhali ahlukahlukene, anezidingo eziphezulu zokuvimbela ukungcoliswa kwempahla.Njengoba izinga eliphezulu lamapuleti ensimbi engenasici akhiqizwa ekhaya limpofu uma kuqhathaniswa, kuwumkhuba ojwayelekile ukwenza imishini, amakhemikhali, nomai-electrolytic polishingkumapuleti ensimbi engagqwali, okokusebenza, kanye nezinsiza ngaphambi kokuhlanza, ukukha, nokudlula ukuze kuthuthukiswe ukumelana nokugqwala kwensimbi engagqwali.
Ifilimu ye-passivation kunsimbi engagqwali inezici eziguqukayo futhi akufanele ithathwe njengokumisa ngokuphelele ukugqwala kodwa kunalokho ukwakheka kongqimba oluvikelayo oluhlakazayo.Ivamise ukonakala lapho kukhona ama-ejenti anciphisayo (njengama-ion e-chloride) futhi ingavikela futhi ilungise lapho kukhona ama-oxidants (njengomoya).
Lapho insimbi engagqwali ivezwa emoyeni, kwakheka ifilimu ye-oxide.
Nokho, izici zokuvikela zale filimu azanele.Nge-asidi pickling, ukushuba isilinganiso 10μm of theinsimbi engagqwali surfaceigqwalile, futhi ukusebenza kwamakhemikhali e-asidi kwenza izinga lokuncibilika ezindaweni ezinokukhubazeka libe phezulu kunezinye izindawo.Ngakho-ke, i-pickling yenza yonke indawo ijwayele ukulingana okufanayo.Okubalulekile, ngokukhethwa kanye nokunciphisa, insimbi nama-oxides ayo ancibilika ngokukhethayo uma kuqhathaniswa ne-chromium nama-oxides ayo, asuse isendlalelo esiqedwe i-chromium futhi enothisa ingaphezulu nge-chromium.Ngaphansi kwesenzo sokudlula sama-oxidants, kwakheka ifilimu ye-passivation ephelele futhi ezinzile, enamandla ale filimu ye-chromium-rich passivation efinyelela ku-+1.0V (SCE), eduze namandla ensimbi esezingeni eliphezulu, ethuthukisa ukuqina kokumelana nokugqwala.
Isikhathi sokuthumela: Nov-28-2023