I-Fluoroelastomers , eyaziwa nangokuthi i-FKM, iwuhlobo lwerabha yokwenziwa enezinto zokuguga zesimo sezulu ezihlukile kanye nezindawo zokumelana ne-ozone. Lezi zici ezihlukile zizenza zifaneleke kakhulu ezinhlelweni zokusebenza ekuzulazuleni kwe-aerospace, lapho ukuchayeka ezimweni zemvelo ezinzima kungenakugwema.
Isici sokuqala okufanele sicatshangelwe ukumelana nesimo sezulu sokuguga kwama-fluoroelastomers. Lezi zinto zaziwa ngekhono lazo lokumelana nokuchayeka isikhathi eside emazingeni okushisa adlulele, emisebeni ye-UV, nezinye izici zesimo sezulu. Ngokungafani nama-elastomer endabuko, ama-fluoroelastomers abonisa ukuwohloka okuncane futhi agcine izakhiwo zawo ezingokomzimba ngisho nangemva kokuchayeka isikhathi eside ezimeni zezulu ezinzima. Lokhu kuzenza zilungele ukusetshenziswa ekuzulazuleni emkhathini, lapho izindiza nemikhumbi-mkhathi zingaphansi kokuguquguquka okukhulu kwezinga lokushisa kanye nokuchayeka njalo elangeni.
Esinye isici esibalulekile sama-fluoroelastomers ukumelana kwawo ne-ozone. I-ozone, uhlobo lwe-oxygen olusebenza kakhulu olutholakala emkhathini woMhlaba, lungabangela umonakalo omkhulu ezintweni eziningi. Nokho, ama-fluoroelastomers abonise ukumelana okuphawulekayo nokucekelwa phansi kwe-ozone. Lokhu kuqina kuqinisekisa ukuphila isikhathi eside nokuthembeka kwezingxenye ezenziwe ngama-fluoroelastomers ezinhlelweni zokuzulazula ze-aerospace, lapho ukuchayeka endaweni enothile nge-ozone kuvame.
Ngokuguga kwawo okukhethekile kwesimo sezulu kanye nokumelana ne-ozone, ama-fluoroelastomers asebaluleke kakhulu embonini yokuzulazula emkhathini. Bathola izinhlelo zokusebenza ezingxenyeni ezibucayi ezahlukahlukene, kufaka phakathi ama-seal, ama-gaskets, ama-O-rings, nezinye izakhi zokuvala. Ikhono lama-fluoroelastomers ukugcina ukusebenza kwawo kanye nobuqotho ezimeni eziyinselele kubalulekile ukuze kuqinisekiswe ukuphepha nokusebenza kahle kwamasistimu okuzulazula emkhathini.
Kulesi sihloko, sizohlola ngokuningiliziwe ukumelana nokuguga kwesimo sezulu kanye nezakhiwo zokumelana ne-ozone zama-fluoroelastomers. Ukwengeza, sizocubungula ukusetshenziswa okuhlukahlukene kwalezi zinto ezibalulekile ekuzulazuleni kwe-aerospace. Ngokuqonda izici eziyingqayizivele zama-fluoroelastomers, abakhiqizi nonjiniyela bangenza izinqumo ezinolwazi mayelana nokukhetha impahla yezinhlelo zokuzulazula ze-aerospace, ekugcineni bathuthukise ukusebenza kwabo nokuthembeka.
Isimo Sezulu Ukumelana Nokuguga ku-Fluoroelastomers
Ama-Fluoroelastomers awuhlobo lwerabha yokwenziwa ekhombisa ukumelana nokuguga kwesimo sezulu. Lesi sakhiwo esiyingqayizivele sibenza bafaneleke kakhulu ukusetshenziswa okuhlukahlukene ezimbonini ezifana nezezimoto, i-aerospace, kanye nokucubungula amakhemikhali. Ukuguga kwesimo sezulu kubhekisela ekonakalisweni kwezinto ngenxa yokuchayeka ezimweni ezinzima zemvelo, okuhlanganisa ukukhanya kwelanga, ukushisa, i-ozone, namakhemikhali. Endabeni yama-fluoroelastomers, ukwakheka kwawo kwamangqamuzana nokwakheka kwawo kunomthelela ekuphikiseni kwawo okuvelele lezi zici.
Esinye sezici ezibalulekile ezenza ama-fluoroelastomers akwazi ukumelana nokuguga kwesimo sezulu okuqukethwe kwawo okuphezulu kwe-fluorine. Lokhu okuqukethwe okuphezulu kwe-fluorine akugcini nje ngokuthuthukisa ukumelana kwazo nokushisa namakhemikhali kodwa futhi kunikeza ukumelana okuhle kakhulu nemisebe ye-ultraviolet (UV) evela elangeni. Imisebe ye-UV ingabangela ukuwohloka kanye nokuqhekeka kwama-polymers ngokuhamba kwesikhathi, okuholela ekunciphiseni ukusebenza kanye nempilo yokuphila. Kodwa-ke, ukumelana ngokwemvelo kwama-fluoroelastomers emisebeni ye-UV kuqinisekisa ukuphila kwawo isikhathi eside ngisho nalapho echayeke ezimeni zangaphandle ezinzima kakhulu.
Ngaphezu kokuqukethwe kwawo okuphezulu kwe-fluorine, ama-fluoroelastomers nawo anomgogodla we-carbon-fluorine oyingqayizivele. Lo mgogodla unomthelela ekuphikeleni kwawo amakhemikhali okukhethekile, okuwenza amelana kakhulu nokuwohloka kwama-asidi, izisekelo, izinyibilikisi, namafutha. Lokhu kumelana nokuhlaselwa kwamakhemikhali kuthuthukisa ngokwengeziwe amandla azo okumelana nokuguga kwesimo sezulu, njengoba ukuchayeka ezintweni ezingcolisa imvelo ezihlukahlukene kanye nokungcola kungasheshisa ukuwohloka kwezinto.
Ngaphezu kwalokho, ama-fluoroelastomers akhombisa ukuzinza okuhle kakhulu kwe-thermal, okubavumela ukuthi bagcine izakhiwo zabo zemishini ebangeni lokushisa elibanzi. Ziyakwazi ukumelana nokushisa okukhulu ngaphandle kokulahlekelwa ukunwebeka kwazo noma zibe brittle. Lokhu kuzinza kwe-thermal kubalulekile ezinhlelweni lapho ama-fluoroelastomers echayeka emazingeni okushisa aphezulu noma ekushintshashintsheni kwezinga lokushisa, njengama-engine seal, ama-gaskets, nama-O-rings.
Ukuqinisekisa ukusebenza kahle kwama-fluoroelastomers ezimweni zokuguga kwesimo sezulu, ukwakheka okufanele kanye nokuhlanganisa kubalulekile. Abakhiqizi bakhetha ngokucophelela futhi bahlanganise izithako ezihlukene ukuze bakhe ama-fluoroelastomers anezakhiwo ezithile nezici zokusebenza. Inqubo yokuhlanganisa ihlanganisa ukuxuba i-fluoroelastomer nezithasiselo ezihlukahlukene, njengama-ejenti elaphayo, ama-accelerator, nama-filler, ukuze kuthuthukiswe izici zayo zobumishini, ukucutshungulwa, kanye nokumelana nokuguga kwesimo sezulu.
Ukumelana ne-Ozone ku-Fluoroelastomers
Ukumelana ne-ozone kuma-fluoroelastomers kuyisici esibalulekile okufanele sicatshangelwe lapho kukhethwa izinto ezisetshenziswa ezimbonini ezahlukahlukene. I-Fluoroelastomers, eyaziwa nangokuthi i-FKM noma i-FPM, ayizinto zenjoloba zokwenziwa ezibonisa ukumelana okukhethekile nokucekelwa phansi kwe-ozone. I-ozone, uhlobo lomoya-mpilo osebenza kakhulu, lungabangela umonakalo omkhulu ezintweni ezisetshenziswayo, okuholela ekuncipheni kokusebenza nempilo. Kodwa-ke, ama-fluoroelastomers akhiwe ngokukhethekile ukuze amelane nemiphumela enzima yokuchayeka kwe-ozone.
Isakhiwo samangqamuzana esiyingqayizivele sama-fluoroelastomers sidlala indima ebalulekile ekuphikisweni kwawo kwe-ozone. Lezi zinto zenziwe ngomgogodla owenziwe nge-carbon kanye nama-athomu e-fluorine. Ukuba khona kwama-athomu e-fluorine kunikeza isithiyo esihle kakhulu ngokumelene nokungena kwe-ozone, ukuvimbela ukwaziswa ekuwohlokeni. Ukwengeza, ama-fluoroelastomers anokumelana okuhle kakhulu nezinye izinto zemvelo ezinjengokushisa, amakhemikhali, namazinga okushisa aphakeme, okuwenza aguquguquke kakhulu ekusetshenzisweni okufunwa kakhulu okuhlukahlukene.
Enye yezinzuzo ezibalulekile zama-fluoroelastomers mayelana nokumelana ne-ozone amandla awo okugcina izakhiwo zawo zemishini ngisho nangemva kokuchayeka isikhathi eside ku-ozone. Ngokungafani namanye ama-elastomer, ama-fluoroelastomers awenzi ukuqina okukhulu noma ukuqhekeka lapho evezwe ku-ozone, okuqinisekisa ubuqotho nokusebenza komsebenzi. Lokhu kubaluleke kakhulu ezimbonini lapho izinto zokusebenza nezingxenye zichayeka ezindaweni ezinothe nge-ozone, njengezimboni zezimoto, i-aerospace, nezimboni zikawoyela negesi.
Ngaphezu kwalokho, ukumelana okukhethekile kwe-ozone kwama-fluoroelastomers kunomthelela empilweni yawo ende yokusebenza. Ngokumelana nemiphumela elimazayo ye-ozone, lezi zinsiza zingagcina izici zazo zokusebenza isikhathi eside, zinciphise isidingo sokushintshwa njalo. Lokhu akugcini nje ngokusindisa izindleko kodwa futhi kunciphisa isikhathi sokuphumula futhi kuqinisekisa ukusebenza okuqhubekayo kwezinhlelo ezibucayi.
Ukuqinisekisa ukumelana ne-ozone okuphezulu, kubalulekile ukukhetha inhlanganisela efanele ye-fluoroelastomer yohlelo ngalunye oluthile. Izici ezifana nezinga lokushisa, ukuchayeka kwamakhemikhali, nokucindezeleka komshini kufanele kucatshangelwe lapho kukhethwa izinto ezifanele. Ukwengeza, ukuklama okufanele kanye nezinqubo zobunjiniyela, okuhlanganisa ukubeka uphawu okwanele kanye nokwenza kahle kwesistimu, kudlala indima ebalulekile ekwandiseni ukusebenza nempilo yezingxenye ze-fluoroelastomer.
Izicelo ze-Fluoroelastomers ku-Aerospace Navigation
Ama-Fluoroelastomers aqhamuke njengengxenye ebalulekile embonini yokuzulazula emkhathini, eshintsha indlela izindiza ezihamba ngayo esibhakabhakeni. Lezi zinto ezithuthukisiwe zinikeza ukumelana okuyingqayizivele emazingeni okushisa aphezulu, amakhemikhali, namafutha, okuzenza zilungele uhla olubanzi lwezinhlelo zokusebenza kulo mkhakha onzima.
Enye yezindlela eziyinhloko ezisetshenziswa ngayo ama-fluoroelastomers ekuzulazuleni kwe-aerospace ukukhiqizwa kwezimpawu kanye nama-gaskets. Lezi zingxenye zidlala indima ebalulekile ekuqinisekiseni ubuqotho bezinhlelo ezihlukahlukene, njengezintambo zikaphethiloli, amasistimu asebenza ngamanzi, nezingxenye zenjini. Ama-fluoroelastomers, anokumelana kwawo okukhethekile nophethiloli namakhemikhali, ahlinzeka ngothiyo onokwethenjelwa ngokumelene nokuvuza nokugqwala, okuthuthukisa ukuphepha nokusebenza kwendiza kukonke.
Okunye ukusetshenziswa okubalulekile kwama-fluoroelastomers kuzixhumi zikagesi nezinhlelo zezintambo. Ukuzulazula kwe-Aerospace kuncike kakhulu kumasistimu kagesi ayinkimbinkimbi ukuxhumana, ukuzulazula, kanye nezinsimbi. Ama-Fluoroelastomers, anezici zawo ezinhle kakhulu zokuvala ugesi, avimbela amasekhethi amafushane futhi aqinisekise ukudluliswa okuthembekile kwamasignali, ngisho nangaphansi kwezimo ezinzima. Lokhu akugcini nje ngokuthuthukisa ukusebenza kahle kwezinhlelo zokuzulazula kodwa futhi kunciphisa ubungozi bokuhluleka kukagesi.
Ngaphezu kwalokho, ama-fluoroelastomers athola ukusetshenziswa okubanzi ekukhiqizeni ama-O-rings kanye nezimpawu zezinhlelo ze-hydraulic. Lezi zinhlelo zibalulekile ekulawuleni ukunyakaza kwezingxenye zendiza ezihlukahlukene, njengegiya lokuhlala, ama-flap, nezindawo zokulawula. Ukumelana kwamakhemikhali okukhethekile kwama-fluoroelastomers kuqinisekisa ukuvaleka okuqinile nokuqina, kuvimbele noma yikuphi ukuvuza koketshezi olusebenzisa amanzi amaningi. Lokhu kunomthelela ekuthembekeni kukonke kanye nokuphepha kwendiza phakathi nokuzulazula.
Ngaphezu kwezakhiwo zabo zokusebenza, ama-fluoroelastomers aphinde anikeze izinzuzo ezibalulekile mayelana nokunciphisa isisindo. Ukuzulazula kwe-Aerospace kugcizelela isidingo sezinto ezingasindi zokuthuthukisa ukusebenza kahle kukaphethiloli nokunciphisa ukukhishwa kwekhabhoni. Ama-Fluoroelastomers, anesilinganiso sawo esikhulu samandla nesisindo, ahlinzeka ngesixazululo esilula ngaphandle kokuyekethisa ekusebenzeni. Lokhu akusizi nje kuphela ekwehliseni isisindo sisonke sendiza kodwa futhi kunomthelela ekuqhubekiseleni phambili okuthuthukisiwe kanye nokwanda komthamo wokukhokha.
Isiphetho
Ama-fluoroelastomers amelana kakhulu nokuguga kwesimo sezulu, okuwenza abe yinketho ekhethwayo ezinhlelweni ezichayeka elangeni, ukushisa, i-ozone, namakhemikhali. Okuqukethwe kwawo okuphezulu kwe-fluorine, ukwakheka kwamangqamuzana okuyingqayizivele, ukumelana namakhemikhali, nokuzinza kokushisa kunomthelela ekuphileni kwabo isikhathi eside nokuthembeka. Izimboni zingazuza ekuqondeni lezi zakhiwo kanye nokukhetha ama-fluoroelastomers ezinhlelo zokusebenza ezimelana nesimo sezulu. Ukwengeza, ama-fluoroelastomers anikeza ukumelana ne-ozone okukhethekile, okuwenza abe yinhle ezimbonini ezithintekayo ngokuchayeka kwe-ozone. Ngokukhetha inhlanganisela efanele ye-fluoroelastomer nokusebenzisa izinqubo zokuklama ezifanele, izimboni zingasebenzisa ukuphikiswa okuphakeme kwe-ozone okuhlinzekwa yilezi zinto. Ama-Fluoroelastomers nawo abalulekile embonini yokuzulazula emkhathini, enikeza ukumelana nezimo ezimbi kakhulu nokuqinisekisa ukuphepha, ukusebenza kahle, nokusebenza kwendiza. Lezi zinto zisetshenziswa kuma-seal, ama-gaskets, izixhumi zikagesi, nezinhlelo ze-hydraulic, ukushayela emisha nokwenza ukuhamba emoyeni kuphephe futhi kuthembeke kakhudlwana.
