2. Ukukhethwa kwezinto eziqhelekileyo zokutywina kwezinto ezinezibonelelo zawo zinezibonelelo zazo ezilungileyo nezingalunganga ngokuchasene nemichiza, ukuxhathisa ubushushu kunye neepropathi zoomatshini.
Ezi zinto zilandelayo zizixhobo eziqhelekileyo zokutywina kunye nezicelo zazo kwi-Acid eqinileyo ne-Alkali:
2.1 I-Fluoroelastomer (i-Fkm / Viton) Fluoelastomer (i-FKM) sisixhobo serabha esijongene ne-acids ezininzi ezomeleleyo. Amandla ayo alala kubushushu obuphezulu, kunye nentsebenzo yayo ebalaseleyo kwioyile, i-fulls kunye nezinyibilikisi ezininzi eziphilayo. Nangona kunjalo, i-vitson ayichasanga kwiziseko ezomeleleyo (umzekelo, iSodium hydroxide, i-potassium hydroxide), ke ngoko akukhuthazwanga indawo eyomeleleyo ye-alkaline.
Izibonelelo: Ukungaxhathisi kakuhle kwii-AIDs ezomeleleyo kunye nokuxhathisa kobushushu obuphezulu.
Izinto ezingalunganga: Ukungaxhathisi kakubi kwi-alkali eyomeleleyo, iindleko eziphezulu.
Indawo efanelekileyo yokusebenza: Indawo eqinileyo ye-ACID, ngakumbi kubushushu obuphezulu bafuna.
2.2 I-Perfluoelastoelastomer (FFKM / Perfluoelastoelastomer) I-Perfluoelastoelastomer Kuyanyangezeleka phantse kuzo zonke iintlobo ze-acids, ialkalis, izinyibilikisi kunye nezinye iichemicals, kwaye zihlala zizinzile kubushushu obuphezulu. Ezi zixhobo zigcina iipropathi zayo zokutywina ixesha elide, kwaye ziphantsi kweemeko ezigqithisileyo, kwaye ngu "phezulu" emgceni "phakathi kwezinto zokutywina kwimveliso yemichiza.
Izibonelelo: Ukungavisisani kwekhemikhali, ukunganyangeki kobushushu obuphezulu, kufanelekile kwezona meko zifunwayo.
Izinto ezingalunganga: Iindleko eziphezulu kakhulu, azilungelanga isicelo esikhulu kwizixhobo ezibuthathaka kwiindleko.
Indawo esebenzayo: I-Acid eyomeleleyo, ialkali, ubushushu obuphezulu kunye nendawo ehlala kakhulu.
2.3 Polytetrafluoroothylene (PTFE / Teflon) Polytetrafliothylene (PTFE) ineezinzo eziphezulu zekhemikhali kunye nokunganyangeki kwe-icid, kwaye i-Alkali okanye i-Alkali okanye isoyile. Ukongeza koku, i-ptfe iyakwazi ukumelana nobushushu obuphakamileyo kwaye ke isetyenziswa ngokubanzi kwimo eqinileyo ye-acid kunye ne-alkali. Kuphela kuphela ukubuyela umva kukuqina okungalunganga, ekufuneka kudityaniswe nezinye ii-elastomers zokufezekisa iziphumo ezingcono zokutywina.
Izibonelelo: Ukunganyangeki ngobuchule, ubushushu obuphezulu, ukuxhathisa obuphezulu, kufanelekile ukuba kube phantse zonke iindawo zoncedo.
Izinto ezingalunganga: Kunokufuneka ukuba zisetyenziswe ngokudibeneyo nezinye izinto.
Indawo esebenzayo: Acid eyomeleleyo, ialkali eyomeleleyo, izinyithisi kunye nendawo yobushushu obuphezulu.
2.4 Irabha ye-proplene proplene (e-EPDM) ye-Ethylene proplene ruber (i-EPDM) yenza imeko eyomeleleyo ye-alkaline, kwaye ilungele ukusetyenziswa kwezisombululo zealkaline. Kananjalo, i-EPDM inesisombululo esihle kwisisombululo se-acidic kwingcinezelo ethile. Nangona kunjalo, ayichasanga kangako kwii-oyile zemineral kunye nezinyibilikisi zezinto eziphilayo, ngoko ke azikhuthazwanga izicelo ezibandakanya ioyile.
Izibonelelo: Umsebenzi obalaseleyo kwi-Alkaline
Izinto ezingalunganga: Ukungaxhathisi i-oils kunye nezinyibilikisi eziphilayo.
Indawo efanelekileyo yokusebenza: Indawo eqinileyo ye-alkaline, ilungele imeko ye-acidic ephantsi nephakathi nephakathi.
2.5 Irabha ye-chloroprene (CR / I-CR / I-CHLOROORORORORORORORORORORORORORORORORORORORORORORORORORORORORENE inenqanaba elithile lokunganyangeki kwamachiza, kwaye senza kakuhle kwizisombululo ze-acid eziphakathi ne-alkali. Igqwesa kwi-oyonition kunye nokuxhathisa i-ozone kwaye ixabisa kakhulu, iyenza ilungele ukusetyenziswa kwizicelo apho iimfuno zokunganyangeki zingaphezulu kakhulu.
Izibonelelo: Ukungaxhathisi i-ozone, ukumelana kwe-oxidation, iindleko eziphantsi.
Izinto ezingalunganga: Ayilungelanga indawo eqinileyo ye-acid kunye ne-alkali.
Imeko efanelekileyo: Indawo yokuthambisa ngobumnene, imeko ye-oxiditye enamandla
3. Izicwangciso ezisetyenzisiweyo zomsebenzi zokukhethwa kwezinto kwizicelo ezisebenzayo, ezi zinto zilandelayo kufuneka ziqwalaselwe xa khetha izinto zetywina:
Ukuxhathisa iikhemikhali : Chonga ezona ntlobo ziphambili zeekhemikhali (Acids, ialkalis okanye izinyibilikisi) kunye noxinzelelo lwabo kwindalo ekuqinisekiseni inqaku lekhemikhali lezinto ezikhethiweyo.
Uluhlu lobushushu: iqondo lobushushu lobushushu yinto ephambili, ngakumbi kwiimeko zobushushu obuphakathi apho kubalulekile ukuzinza komzimba kwezinto kubalulekile.
Uxinzelelo loomatshini: Uxinzelelo lwendlela (umz.
Izinto ezixabisa iindleko: Ukuba zinolwazelelelo, ungasebenzisa izixhobo zokuphela eziphezulu njenge-FFKM kwiindawo ezikwindawo, ngelixa ukhetha izixhobo ezixabisa kakhulu ezifana ne-EPDM kwiindawo ezihlaziyiweyo.
4. Shwankathela i-acid eqinileyo, i-Alkali Imeko, ukhetho lwezinto zokutywina zihambelana ngqo nefuthe lokutywina kunye nobomi benkonzo yezixhobo. Irabha ye-fluorine, i-perfluother rubber, i-polytetrafluororoothylene kunye ne-ethoylene proplene proplene irabha kunye nezinye izinto ezinokuziphatha ezikhoyo, eziluncedo kwindalo, eziluncedo, iqondo lobushushu, uxinzelelo lwexabiso. Kwindawo ezinobuchule kakhulu, i-PFE kwaye i-PTU ilungele, ngelixa izicelo ezinobuthathaka okanye ezingaphantsi komhlaba, e-EPDM kunye ne-neoprene zizinto ezifanelekileyo.
