Ko te paninga mimiti, he tukanga matua mō te whakatakoto mimiti (PVD), e whakawhirinaki ana ki te hangarau korehau. Ehara te papu korehau i te taputapu āwhina noa iho engari ko te pou e āhei ai te tukanga katoa mā te waihanga me te pupuri i tētahi taiao tauine-ngota e tino whakahaerehia ana. He nui atu tana mahi i tua atu i te tango hau noa, e whakatū ana i ngā āhuatanga tinana tika e hiahiatia ana mō te whakatakoto i ngā kiriata angiangi kounga teitei.
Ko te take matua mō te hiahia ki te korehau nui kia tika te haere o ngā matūriki kua mimiti. I te pēhanga hau, ka puta he tukinga ohorere me te tūpono nā te nui o te kiato o ngā ngota hau, ka marara te rauemi paninga. I raro i te korehau nui (te tikanga 10⁻⁴ ki te 10⁻⁶ mbar), ka piki haere te ara noa toharite o ngā ngota, ngā ngota rānei kua mimiti ki te maha mita, ka taea ai e rātou te haere tika mai i te pūtake ki te papa. Mā tēnei ka taea te whakahaere tika i te matotoru o te kiriata, te ōritetanga, me te hanganga.
Hei tāpiri atu, ka ārai te taiao korehau teitei i te waikura me te poke. He tino tauhohe te nuinga o ngā konganuku (hei tauira, te konumohe, te chromium) me ngā matū i ngā pāmahana mimiti. Mā te tata-whakakorenga o ngā hau tauhohe pēnei i te hāora me te mamaoa wai ka whakarite kia putunga ngā rauemi ki roto i tō rātou āhua parakore, he mea nui tēnei mō te whakatutuki i ngā āhuatanga whatu, hiko, hangarau rānei i roto i te paninga whakamutunga. Ka whakaratohia hoki e tēnei taiao he mata papa ma te ngota mā te tango i ngā poke, he mea nui tēnei mō te piri kaha o te kiriata.
He mahi ā-hangarau taiao te pūnaha papu korehau. Me tere te whakatū i te pēhanga turanga e hiahiatia ana, me pupuri tonu te pumau mā te tango i te hau mai i ngā rauemi me ngā taputapu, me te whakahaere i ngā hua taha i roto i ngā tukanga tauhohe. He mea nui tēnei pumau mō te kounga whakaputa ōrite i ia puranga.
Ko te hiahia nui mō te tātari ka puta mai i te tiaki i tēnei pūnaha tino tika. Ka taea e te tukanga paninga te whakaputa i ngā matūriki angiangi, ngā pata wai e tauhiuhi ana, ngā kohu rānei ka taea te whakamakuku. Ki te kore hetātari whakaurunga, ka taea te whakahoki mai i ēnei poke ki roto i te papu korehau. Ka hua ake tēnei i te nui haere o te kakahu o ngā rotors me ngā mata, te poke o te hinu papu (i roto i ngā pūnaha hiri-hinu), me te heke haere o te tere papu me te korehau mutunga. I te mutunga, ka whakararu tēnei i te pumau o te tukanga, ka whakapoto i te roa o te mahi papu, ā, ka piki ake ngā utu tiaki. Nō reira, ehara i te mea whiriwhiri te tāuta i ngā tātari tika—pēnei i ngā tātari matūriki, ngā mahanga ngota, ngā mahanga makariri rānei—engari he haumitanga nui hei tiaki i te papu korehau, hei whakarite i te kounga paninga pumau, me te tiaki i te wā mahi whakaputa.
I te katoa, ka taea e ngā papu korehau te paninga mimiti mā te whakarato i tētahi taiao parakore, kore poke, me te whakahaeretia mō te kawe rauemi me te hanganga kiriata. He mea nui te hono atu i tēnei āheinga me tētahi rautaki tātari pakari kia tutuki ai te hanga kiriata angiangi pono, mahi teitei, me te ohanga.
Wā tuku: Hakihea-25-2025
