pahu pretreatment & Whakawera
Whakaahuatanga Hua
- Ko te maimoatanga o mua ko te tikanga matua o te piauau wera-wera, he paanga nui ki te kounga o nga hua piauau.Ko te whakamahana i mua i te maimoatanga ko: te whakaheke, te tango waikura, te horoi wai, te awhina whakakikorua, te whakamaroke, me era atu.
I tenei wa, i roto i te ahumahi piauau wera-wera o te whare, kei te whakamahia nuitia te tank toka toka raima.Na te whakaurunga o te hangarau piauau wera-wera i Uropi me Amerika, kei te kaha haere te whakamahi i nga taika pikau PP (polypropylene)/PE (polyethylene) ki etahi raina hanga piauau wera-wera.
I runga i te kaha o te poke hinu i runga i te mata mahi, ka whakakorehia te whakaheke i etahi o nga tikanga.
Ko te taika whakaheke wai, te taika horoi wai me te taika awhina whakakikorua i te nuinga o te waa he hanga raima, a ko etahi he mea hanga mai i nga mea rite ki te taika pikapi.
Te whakamahana i mua i te maimoatanga
Whakamahia te wera para o te hau rewharewha ki te whakamahana i nga taika i mua i te maimoatanga, tae atu ki te whakaheke,pīkarame te whakakikorua awhina.Kei roto i te punaha wera para:
1) Te whakaurunga o te whakawhiti wera whakakotahi i roto i te rewharewha;
2) Kotahi te huinga whakawhiti wera PFA ka whakauruhia ki nga pito e rua o ia puna;
3) Pūnaha wai ngawari;
4) Pūnaha whakahaere.
E toru nga waahanga o te whakamahana o mua:
① Whakawhiti wera hau rewharewha
E ai ki te tapeke o te wera ki te whakamahana, ka hangaia, ka hangaia hoki te whakawhitinga o te wera o te rewharewha whakakotahi, kia taea ai e te wera te whakatutuki i nga whakaritenga whakamahana.Mena ka kore e taea e te wera para o te rewharewha te whakatutuki i te hiahia o te wera whakamahana o mua i te maimoatanga, ka taea te taapiri i tetahi huinga oumu hau wera hei whakarite i te nui o te hau rewharewha.
Ko te whakawhiti wera he mea hanga mai i te kowiri tira-wera, 20 # ranei te putorino maitai tuitui me te nano infrared hou mo te wera nui-whakaora i te paninga anti-corrosion.Ko te kaha o te whakauru wera ko te 140% o te wera ka mauhia e te kaitahuri wera wera noa.
② PFA whakawhiti wera
③Umu whakamaroke
Ka uru te hua ki roto i te kaukau konutea, ka pahū te wai konutea, ka pakaru.Na reira, i muri i te awhina whakakikorua, me tango ano te whakamaroke mo nga waahanga.
Ko te tikanga, ko te pāmahana whakamaroke kaua e neke ake i te 100 ° C, kaua hoki e iti iho i te 80 ° C. Ki te kore, ka taea anake te whakanoho i nga waahanga ki roto i te rua whakamaroke mo te wa roa, ka ngawari te whakauru o te makuku o te zinc chloride i roto i te tote. kiriata o te awhina whakakikorua i runga i te mata o nga waahanga.
