Izakhiwo ezijwayelekile zomzimba nezamakhemikhali
Uhlobo ngalunye lwegrisi lokuthambisa lunezici zalo ezijwayelekile zomzimba nezamakhemikhali ukukhombisa ikhwalithi yemvelo yomkhiqizo. Okokugcoba, lezi zakhiwo ezijwayelekile zomzimba namakhemikhali zimi kanje:
(1) Ubuningi
Ubuningi yinkomba yokusebenza elula kakhulu futhi esetshenziswa kakhulu yokugcoba. Ubuningi bamafutha okugcoba buyanda ngokwanda kwenani lekhabhoni, ioksijini, nesibabule ekubunjweni kwawo. Ngakho-ke, ngaphansi kwe-viscosity efanayo noma ubukhulu obufanayo bamangqamuzana, ubukhulu bamafutha okugcoba aqukethe ama-hydrocarbon amaningi anamakha kanye nezinsini eziningi nama-asphaltenes Okukhulu kakhulu, kunama-cycloalkanes amaningi phakathi, futhi okuncane kakhulu kunama-alkanes amaningi.
(2) Ukubukeka (chromaticity)
Umbala kawoyela uvame ukukhombisa ukucwengwa kwawo nokusimama kwawo. Kukawoyela oyisisekelo, kukhuphuka izinga lokucwengwa, kuhlanzwa ama-hydrocarbon oxides nama-sulfide kuyasuswa, umbala ukhanye kakhudlwana. Kodwa-ke, noma ngabe izimo zokucwenga ziyafana, umbala nokusobala kuka-oyili oyisisekelo okhiqizwe emithonjeni kawoyela ehlukile nakoyela ongahluziwe we-base kungahluka.
Okokugcoba okusha okuqediwe, ngenxa yokusetshenziswa kwezithasiselo, umbala njengenkomba ukwahlulela izinga lokucwengwa kukawoyela oyisisekelo ulahlekelwe yincazelo yawo yasekuqaleni
(3) Inkomba ye-viscosity
Inkomba ye-viscosity ikhombisa izinga lapho i-viscosity kawoyela ishintsha khona ngokushisa. Ukuphakama kwenkomba ye-viscosity, lapho i-viscosity kawoyela incipha kakhulu ekushiseni, ngcono ukusebenza kwayo kwe-viscosity-temperature, futhi okuphambene nalokho
(4) I-viscosity
I-viscosity ikhombisa ukungqubuzana kwangaphakathi kukawoyela, futhi iyinkomba kawoyela nokufudumala. Ngaphandle kwanoma yiziphi izithasiselo ezisebenzayo, i-viscosity iyanda, amandla wefilimu kawoyela ayanda, futhi uketshezi kubi kakhulu.
(5) Iphuzu le-Flash
I-flash point iyinkomba yokuhwamuka kukawoyela. Ukukhanya kwengxenyana kawoyela, kukhula kakhulu ukukhuphuka futhi kwehle isibani saso. Ngakolunye uhlangothi, uma usayizi wengxenyene kawoyela usinda, iba ngumphunga omncane, futhi iphakamise isibani sayo. Ngasikhathi sinye, i-flash point iyinkomba yengozi yomlilo yemikhiqizo kaphethiloli. Amazinga anobungozi emikhiqizo kawoyela ahlukaniswa ngokwezibani zawo ze-flash. Iphoyinti elingaphansi lingaphansi kuka-45 ℃ njengemikhiqizo evuthayo, futhi ngaphezu kuka-45 products yimikhiqizo evuthayo. Akuvunyelwe nakancane ukushisa uwoyela emazingeni okushisa we-flash point ngesikhathi sokugcinwa kukawoyela nokuhamba. Endabeni ye-viscosity efanayo, i-flash point ephakeme, iba ngcono. Ngakho-ke, umsebenzisi kufanele akhethe ngokuya ngamazinga okushisa nokusebenza kwezindawo zokugcoba lapho ekhetha i-lubricant. Ngokuvamile kukholelwa ukuthi i-flash point ingama-20 ~ 30 ℃ ngaphezulu kunezinga lokushisa elisebenzayo, futhi ingasetshenziswa ngokuthula kwengqondo.
Isikhathi Iposi: Dec-25-2020