Ngokuthuthuka okusheshayo komnotho wezenhlalakahle, indawo enkulu yolwandle kanye nemithombo yasolwandle ecebile isiqalile ukungena emkhakheni wombono wabantu.Ulwandle luyindlu enkulu yengcebo yensiza, ecebile ngemithombo yebhayoloji, izinsiza zamandla kanye nemithombo yamandla olwandle.Ukuthuthukiswa nokusetshenziswa kwezinsiza zasolwandle akuhlukaniseki ocwaningweni nasekuthuthukisweni kwezinto ezikhethekile zasolwandle, futhi ukuklwebhana nokuguga ezindaweni zasolwandle ezinokhahlo yizindaba ezibalulekile ezivimbela ukusetshenziswa kwezinto zasolwandle kanye nokuthuthukiswa kwempahla yasolwandle.Tadisha ukugqwala nokuguga kokuziphatha kwe-316L kanye ne-2205 yensimbi engagqwali ngaphansi kwezimo ezimbili ezivame ukusetshenziswa emanzini olwandle: ukugqwala kwamanzi olwandle nokuvikelwa kwe-cathodic, futhi usebenzise izindlela ezihlukahlukene zokuhlola ezifana ne-XRD, i-metallography, ukuhlolwa kwe-electrochemical nokugqwala kanye nokugqoka ukusebenzisana ukuze uhlaziye i-microstructure. izinguquko zesigaba Kuma-engeli, umthelela wokuguga okushelelayo kwamanzi olwandle ekugqwaleni nasekugqokeni kwezakhiwo zensimbi engagqwali kuyahlaziywa.Imiphumela yocwaningo imi kanje:
(1) Izinga lokuguga lika-316L ngaphansi komthwalo ophezulu lincane kunezinga lokuguga ngaphansi komthwalo ophansi.Ukuhlaziywa kwe-XRD kanye ne-metallographic kukhombisa ukuthi i-316L iba noguquko lwe-martensitic ngesikhathi sokushelela kwamanzi olwandle, futhi ukusebenza kahle kwayo kokuguqulwa kucishe kube ngama-60% noma ngaphezulu;Uma kuqhathaniswa namazinga okuguqulwa kwe-martensite ngaphansi kwezimo ezimbili zamanzi olwandle, kutholwe ukuthi ukugqwala kwamanzi olwandle kuphazamisa ukuguqulwa kwe-martensite.
(2) Ukuskena kwe-Potentiodynamic polarization nezindlela ze-electrochemical impedance zasetshenziselwa ukutadisha umthelela wezinguquko ze-316L microstructural ekuziphatheni kokugqwala.Imiphumela yabonisa ukuthi ukuguqulwa kwesigaba se-martensitic kuthinte izici nokuzinza kwefilimu ye-passive ebusweni bensimbi engagqwali, okuholela ekugqwaleni kwensimbi engagqwali.Ukumelana nokugqwala kuba buthaka;Ukuhlaziywa kwe-electrochemical impedance (EIS) nakho kufinyelele esiphethweni esifanayo, futhi i-martensite ekhiqiziwe kanye ne-austenite engaguquki yakha i-microscopic electronic coupling, yona eshintsha ukuziphatha kwe-electrochemical yensimbi engagqwali.
(3) Ukulahlekelwa impahla316L insimbi engagqwalingaphansi kwamanzi olwandle kuhlanganisa ukungqubuzana okumsulwa kanye nokulahlekelwa kwempahla yokugqoka (W0), umthelela we-synergistic wokugqwala ekugqokeni (S') kanye nomthelela we-synergistic wokuguga ekugqwaleni (S'), kuyilapho ukuguqulwa kwesigaba se-martensitic kuthinta Ubudlelwano phakathi kokulahleka kwezinto ezibonakalayo ingxenye ngayinye ichazwe.
(4) Ukugqwala nokuziphatha kokuguga kwe2205insimbi enezigaba ezimbili ngaphansi kwezimo ezimbili zamanzi olwandle yacwaningwa.Imiphumela yabonisa ukuthi: izinga lokuguga lensimbi engu-2205 yesigaba esikabili ngaphansi komthwalo ophezulu lalincane, futhi ukuguga kokuslayida kwamanzi olwandle kubangele ukuthi isigaba sika-σ senzeke phezu kwensimbi enezigaba ezimbili.Izinguquko ze-Microstructural ezifana ne-deformations, dislocations kanye ne-lattice shifts zithuthukisa ukumelana nokugqoka kwensimbi enezigaba ezimbili;uma kuqhathaniswa ne-316L, insimbi engu-2205 enezigaba ezimbili inenani elincane lokuguga kanye nokumelana nokuguga okungcono.
(5) Indawo yokusebenza ye-electrochemical yasetshenziswa ukuhlola izici ze-electrochemical zendawo egugile yensimbi enezigaba ezimbili.Ngemuva kokuguga emanzini olwandle, amandla okuzilimaza we2205insimbi enezigaba ezimbili yehla futhi ukuminyana kwamanje kwanda;kusukela ku-electrochemical impedance test method (EIS) iphinde yaphetha ngokuthi inani lokumelana lendawo egqokekayo ye-duplex steel liyehla futhi ukumelana nokugqwala kwamanzi olwandle kuba buthaka;isigaba sika-σ esikhiqizwe ukuguga okuslayidayo kwensimbi eyi-duplex ngamanzi olwandle kunciphisa izakhi ze-Cr ne-Mo ezizungeze i-ferrite ne-austenite, okwenza insimbi eyi-duplex ibe lula ukugqwala kwamanzi olwandle, futhi imigodi yokugoba nayo ijwayele ukwakheka kulezi zindawo ezinokukhubazeka.
(6) Ukulahlekelwa impahla2205 insimbi eyi-duplexngokuyinhloko kuvela ekungqubuzaneni okumsulwa nokulahlekelwa kwezinto ezibonakalayo, okubalela cishe u-80% kuya ku-90% wokulahlekelwa okuphelele.Uma kuqhathaniswa nensimbi engagqwali engu-316L, ukulahleka kwempahla kwengxenye ngayinye yensimbi eyi-duplex kukhulu kunaleyo ye-316L.Encane.
Kafushane, kungaphethwa ngokuthi insimbi ye-2205 enezigaba ezimbili inokumelana nokugqwala okungcono endaweni yamanzi olwandle futhi ifaneleka kakhulu ukusetshenziswa emanzini olwandle nokugqwala kanye nendawo egugileyo.
Isikhathi sokuthumela: Dec-04-2023