I te tere o te whanaketanga o te ōhanga pāpori, kua tīmata te uru atu o te moana whānui me ngā rauemi moana whai rawa ki te tirohanga a te tangata. He whare taonga nui te moana, he nui ngā rauemi koiora, ngā rauemi pūngao me ngā rauemi pūngao moana. Kāore e taea te wehe i te whanaketanga me te whakamahinga o ngā rauemi moana mai i te rangahau me te whakawhanake i ngā rauemi motuhake o te moana, ā, ko te waku me te pakaru i roto i ngā taiao moana uaua he take matua e aukati ana i te whakamahinga o ngā rauemi moana me te whakawhanake i ngā taputapu moana. Akohia te whanonga waikura me te pakaru o te maitai kore waikura 316L me te 2205 i raro i ngā āhuatanga waikura e rua e whakamahia whānuitia ana: te pakaru waikura o te waikura me te tiaki cathodic, me te whakamahi i ngā momo tikanga whakamātautau pēnei i te XRD, te metallography, te whakamātautau hikohiko me te waikura me te pakaru me te pakaru hei tātari i ngā huringa āhua hanganga moroiti. Mai i te koki, ka tātarihia te pānga o te pakaru reti o te waikura ki ngā āhuatanga waikura me te pakaru o te maitai kore waikura. Ko ngā hua rangahau e whai ake nei:
(1) He iti ake te tere o te kakahu o te 316L i raro i te kawenga nui i te tere o te kakahu i raro i te kawenga iti. E whakaatu ana te tātaritanga XRD me te whakaahua whakarewa ka huri te 316L i te wā e neke ana te kakahu o te wai moana, ā, ko tōna pai o te hurihanga he tata ki te 60% neke atu rānei; I te whakataurite i ngā tere hurihanga martensite i raro i ngā āhuatanga wai moana e rua, i kitea ko te waikura o te wai moana ka aukati i te hurihanga martensite.
(2) I whakamahia te matawai potentiodynamic polarization me ngā tikanga aukati hiko hei ako i te awe o ngā huringa hanganga moroiti 316L ki te whanonga waikura. I whakaatuhia e ngā hua i pā te huringa wāhanga martensitic ki ngā āhuatanga me te pumau o te kiriata kore mahi i runga i te mata o te maitai kore waikura, ka hua ake te waikura o te maitai kore waikura. Ka ngoikore te ātete waikura; i tae atu hoki te tātaritanga aukati hiko (EIS) ki tētahi whakatau ōrite, ā, ko te martensite i hangaia me te austenite kāore i hurihia ka hanga hononga hiko moroiti, ka huri i te whanonga hiko o te maitai kore waikura.
(3) Te ngaronga rawa o316L maitai kore waikurakei raro i te wai moana te waku parakore me te ngaronga rauemi kakahu (W0), te pānga tahi o te waikura ki te kakahu (S') me te pānga tahi o te kakahu ki te waikura (S'), ā, ka pā te huringa āhua martensitic ki te whanaungatanga i waenga i te ngaronga rauemi o ia wāhanga.
(4) Te waikura me te whanonga kakahu o2205I rangahauhia te maitai takirua-wāhanga i raro i ngā āhuatanga wai moana e rua. I whakaatuhia e ngā hua: he iti ake te tere pakaru o te maitai takirua-wāhanga 2205 i raro i te kawenga nui, ā, i puta te āhua σ i runga i te mata o te maitai takirua-wāhanga nā te paheketanga o te wai moana. Ko ngā huringa hanganga moroiti pēnei i ngā whakarerekētanga, ngā nekehanga me ngā nekehanga whatunga ka whakapai ake i te ātete pakaru o te maitai takirua-wāhanga; ki te whakaritea ki te 316L, he iti ake te tere pakaru o te maitai takirua-wāhanga 2205, ā, he pai ake te ātete pakaru.
(5) I whakamahia he teihana mahi hikohiko hei whakamātautau i ngā āhuatanga hikohiko o te mata kakahu o te maitai takirua-wāhanga. Whai muri i te kakahu reti i roto i te wai moana, ko te pūmanawa waikura-ā-roto o te2205I heke te maitai takirua-wāhanga, ā, i piki ake te mātotoru o te iahiko; mai i te tikanga whakamātautau ārai hiko (EIS) i whakatauhia hoki ko te uara ātete o te mata kakahu o te maitai takirua ka heke, ā, ka ngoikore te ātete waikura o te wai moana; ko te wāhanga σ i puta mai i te kakahu reti o te maitai takirua e te wai moana ka whakaiti i ngā huānga Cr me Mo huri noa i te ferrite me te austenite, ka ngawari ake te waikura o te maitai takirua ki te waikura o te wai moana, ā, he ngawari hoki te hanga o ngā poka poka i roto i ēnei wāhi hapa.
(6) Te ngaronga rawa o2205 maitai takiruaKo te nuinga o te wā, nā te waku me te pakaru o ngā rauemi i puta mai ai, e 80% ki te 90% o te ngaronga katoa. Ki te whakatauritea ki te maitai kore waikura 316L, he nui ake te ngaronga rauemi o ia wāhanga o te maitai takirua i tērā o te 316L. He iti noa iho.
Hei whakarāpopototanga, ka taea te whakatau he pai ake te ātete o te maitai takirua-wāhanga 2205 ki te waikura i roto i te taiao wai moana, ā, he pai ake mō te tono i roto i te taiao waikura me te kakahu o te wai moana.
Wā tuku: Hakihea-04-2023