ʻI he taimi ni, lahi e ngaahi fie maʻu fakaʻaho ʻoku ngaohi ʻaki e kopa, ukamea, stainless ukamea mo e ngaahi naunau kehe. ʻOku ʻi he ngaahi naunau ko ʻeni ha ngaahi ʻelemeniti ukamea mamafa. Kapau ʻoku ʻikai fakaʻaongaʻi totonu kinautolu, ʻe lava ke mahulu hake ia ʻi he tuʻunga moʻuí.

Hange ko ʻeni, ʻOku kau ʻi he ngaahi tefitoʻi ʻelemeniti ʻo stainless ukamea ʻa e manganese, chromium, mo e seniti ʻe nima. Koeʻuhi ke lava ʻo tauhi corrosion fakafepaki, kuo pau ke ʻi stainless ukamea ha lahi ʻo e chromium. Kapau ʻoku taʻetotonu hono fakaʻaongaʻi ʻo e chromium, ʻe lava ke ne fakatupu ha chromium lahi. ʻI he founga tatau, ʻe lava ke iku hono tokangaʻi taʻetotonu ʻo e manganese ki he fuʻu manganese.

ʻOku ʻi he alloy kopa ʻoku fakaʻaongaʻi ke ngaohi ʻaki e paipa vai ha ʻo ʻo e ngaahi ʻelemeniti ukamea hange ko e ukamea, foila, pea taki. Kapau ʻoku ʻikai ke ʻi ai ha taki, ʻOku faingataʻa ke faʻu lolotonga hono laku. Ko e maʻolunga ange ʻa e meʻa ʻi loto, ʻa e faingofua ange ʻa e founga hono laku. Ko ia, ʻOku faʻa ʻi ai ha paʻanga pau ʻi he paipa vai ʻi he maketi. Kapau ʻoku ʻikai fai ʻe he fale ngaohiʻanga ha ngaue lelei ki hono toʻo ʻo e taki lolotonga e ngaohiʻanga koloa, te ne fakatupu ha fuʻu taki lahi.

Ko e ʻuhinga ʻe taha he ʻoku motuʻa e tekinolosia mo e meʻangaue ʻa e kautaha, fakatupu ha ngaahi ʻelemeniti ke ʻoua naʻa mapuleʻi. ʻOku faʻa, ʻi he taimi ʻoku fuofua fokotuʻutuʻu ai ʻa e meʻangaue foʻou, ʻoku feʻunga hono koloa, ka ʻi he taimi ʻoku fakaʻaongaʻi ai ʻa e meʻangāué ʻi ha taimi lōloa, ʻe mahulu hake ʻa e koloa ʻi he ngaahi ʻelemeniti ʻo e fakahokohoko. He ʻikai lava ke fakaleleiʻi e tūkunga ko ʻení mei ha tuʻunga fakatekinikale ʻo e fakakaukaú pea ʻe toki lava pē ke fetongi ʻaki ha meʻangāue foʻou. Neongo ia, some factories continue to use them in order to save money. This is a technical and cost issue.

Naʻe fakaha ʻe ha meʻangaue fakataua ʻo e falekaukau ki he kau faiongoongo ko e lahi taha ʻo e ngaahi paipa vai ʻi he maketi ʻoku ʻi ai e kopa cores, ka ʻoku kehekehe pe ʻa e tuʻunga lelei. ʻOku ngalingali ʻe laka hake ʻa e paipa vai mei he fanga kiʻi kautaha faʻu koloa mo e totongi maʻamaʻa ange ʻi he taki. ʻOku tupu ʻeni he ʻoku ʻi ai ha niʻihi ʻoku ʻikai ke nau fakatau ʻa e alloys palasa angamaheni kae lava ke mapuleʻi ʻa e fakamole, ka ʻoku ne fakatau ʻa e palasa ko ha ngaahi naunau mei he fanga kiʻi ako iki. ʻOku fakahehema ʻa e faʻahinga taki palasa ko ʻeni ke ʻi ai ha meʻa maʻolunga, ka ko e totongi ko e vaeua pe ia ʻo e alloy palasa.

Founga hono fakafaikehekeheʻi ʻo e paipa vai maʻulalo mei he totongi? Naʻe talaange ʻe ha insider ki he kau faiongoongo ʻoku totonu ke fakamole ha Singi mama kopa mo e potoʻingaue ʻo laka hake ʻi he 100 ʻIuani, Neongo ʻoku ngalingali ʻe fakaʻaongaʻi ʻe ha Singi mama ʻoku mahuʻinga ʻa e ʻIuani ʻa e palasa.

“Fakafehoanaki ki he ngaahi koloa lalahi, ʻOku ʻikai fuʻu mahuʻinga ʻa e paipa vai ʻoku mahuʻinga ke fakamoleki ha taimi mo ha ivi lahi ke fili tahataha, pea he ʻikai ke ne tokanga ki he palopalema ʻo e fuʻu totuʻa ʻa e meʻa ʻoku tataki.” Naʻe talaange ʻe ha tangataʻi fonua Shanghai ʻoku ne teuteuʻi hono ʻapi ki he kau faiongoongo.

ʻI he meʻa ni, Naʻe pehe ʻe ha kakai ʻe niʻihi ʻi he ngaueʻanga naʻe ʻikai ke tokanga feʻunga ʻa e consumers fakalotofonua ki he tuʻunga lelei mo e malu ʻo e paipa vai, ʻa ia naʻa ne ʻomi foki ha faingamalie ʻoku ʻikai feʻunga mo maʻulalo.