Njengamanje, kunezinhlobonhlobo ze- PCB ibhodi emakethe ngemibala ehlukahlukene ekhazimulayo. Imibala ejwayelekile yebhodi le-PCB iluhlaza okotshani, omnyama, oluhlaza okwesibhakabhaka, ophuzi, onsomi, obomvu futhi onsundu, abanye abakhiqizi baphinde bakha ngobuhlakani imibala emhlophe, ebomvana neminye imibala ehlukile ye-PCB.

Ezahlukene umbala PCB ibhodi isingeniso

Ngokuvamile kukholelwa ukuthi i-PCB emnyama ibonakala ibekwe ekugcineni okuphezulu, kanti obomvu, ophuzi njalonjalo kugcinelwe ukuphela okuphansi. Kuyiqiniso lokho?

Ekukhiqizeni kwe-PCB, ungqimba lwethusi, noma ngabe lwenziwe ngokungeza noma ngokususa, luphelela endaweni ebushelelezi nengavikelekile. Yize izici zamakhemikhali zethusi zingasebenzi njenge-aluminium, i-iron, i-magnesium njalonjalo, kodwa esimweni samanzi, oxhumana nethusi elihlanzekile ne-oksijeni kutholakala kalula nge-oxidized; Ngenxa yobukhona bomoya-mpilo nomhwamuko wamanzi emoyeni, ingaphezulu lethusi elihlanzekile lizoxhuma ngokushesha lapho lithintana nomoya. Ngoba ubukhulu bensimbi yethusi ebhodini le-PCB lincane kakhulu, ithusi elenziwe i-oxidized lizoba ngumqhubi omubi kagesi, ozolimaza kakhulu ukusebenza kagesi kwe-PCB yonke.

Ukuvimbela i-oxidation yethusi, ukuhlukanisa izingxenye ezifakwe ezingafakwa ze-PCB ngesikhathi sokushisela, nokuvikela ubuso bebhodi le-PCB, onjiniyela bokwakha bakha i-coating ekhethekile. Le enamathela ingasetshenziswa kalula ebusweni bebhodi le-PCB, kwakheka ungqimba oluvikelayo lobukhulu obuthile futhi luvimbele ukuxhumana phakathi kwethusi nomoya. Lolu ungqimba lokumboza lubizwa ngokuthi ukuvimba kwe-solder futhi okokusebenza okusetshenzisiwe ngopende wokuvimba we-solder.

Uma ibizwa ngopende, kufanele kube umbala ohlukile. Yebo, upende we-solder oluhlaza ungenziwa ungenambala futhi ubonakale, kepha ama-PCBS ngokuvamile adinga ukuphrinta umbhalo omncane ebhodini ukuze ulondolozwe kalula futhi ukhiqizwe. Ukupenda kokumelana okusobala okungabonisa kuphela isizinda se-PCB, ngakho-ke noma ngabe ukukhiqiza, ukugcinwa noma ukuthengiswa, ukubukeka akulungile ngokwanele. Ngakho-ke onjiniyela banezela imibala ehlukahlukene kwi-solder emelana nopende, okuholela kuma-PCBS amnyama noma abomvu noma aluhlaza okwesibhakabhaka. Kodwa-ke, kunzima ukubona ukuxhunywa kwe-PCB emnyama, ngakho-ke kuzoba nobunzima ekunakekelweni.

Ngokombono, umbala webhodi le-PCB nekhwalithi ye-PCB abukho ubuhlobo. Umehluko phakathi kwe-PCB emnyama ne-PCB eluhlaza okwesibhakabhaka, i-PCB ephuzi neminye imibala ye-PCB ilele kumbala wepende lokumelana nebhulashi lokugcina. Uma i-PCB yakhelwe futhi yakhiqizwa ngokufana ncamashi, umbala ngeke ube nomthelela ekusebenzeni, futhi ngeke ube nomthelela ekusakazekeni kokushisa. Ngokuqondene ne-PCB emnyama, i-wiring yayo yomhlaba icishe imbozwe ngokuphelele, edala ubunzima obukhulu ekugcinweni kamuva, ngakho-ke akulula kakhulu ukwenza nokusebenzisa umbala. Ngakho-ke, eminyakeni yamuva nje, abantu bayashintsha kancane kancane, bayeke ukusetshenziswa kopende omnyama wokushisela, ukusebenzisa okuluhlaza okotshani, onsundu omnyama, okuluhlaza okwesibhakabhaka nokunye ukupenda kokushisela, inhloso ukwenza lula ukukhiqizwa nokunakekelwa.

Ekhuluma ngalo, ngokuyisisekelo siye saqonda inkinga yombala we-PCB. Ngokuqondene nesisho esithi “umbala umele ibanga eliphakeme noma ibanga eliphansi”, kungenxa yokuthi abakhiqizi bathanda ukusebenzisa i-PCB emnyama ukwenza imikhiqizo esezingeni eliphakeme, futhi basebenzise imikhiqizo ebomvu, eluhlaza okwesibhakabhaka, eluhlaza okotshani, ephuzi neminye ephansi.Isiphetho ngukuthi: umkhiqizo unikeza incazelo yombala, kunokuba umbala unikeze umkhiqizo incazelo.