Yog vim li cas rau roj hmab laus
1. Thermal oxidative aging: Thaum cov khoom siv roj hmab tuaj rau hauv cov pa oxygen hauv huab cua, oxidation cov tshuaj tiv thaiv yuav tshwm sim nyob rau hauv qhov kub thiab txias, ua rau cov khoom siv roj hmab tawv, tawg, thiab nkig.
2. Photooxidative aging: Radiation xws li ultraviolet rays yuav rhuav tshem cov roj hmab molecular saw thiab hnov mob nrog oxygen nyob rau hauv cov huab cua los tsim cov dawb radicals, ua rau kev laus thiab kev puas tsuaj rau cov khoom siv roj hmab.
3. Kev ua tshuaj lom neeg: Cov khoom siv roj hmab tau yooj yim corroded los ntawm cov tshuaj xws li acid thiab alkali tshuaj, ozone, chlorine, thiab hnyav hlau nyob rau hauv huab cua, ua rau kev laus.
4. Mechanical action: Mechanical actions xws li stretching, compression, dabtsi yog khoov, thiab torsion uas cov khoom siv roj hmab raug rau thaum siv yuav ua rau cov txheej txheem kev laus ntawm cov khoom siv roj hmab.
5. Kev khaws cia: cov khoom siv roj hmab kuj yuav muaj hnub nyoog thiab tsis zoo nyob rau hauv qhov chaw cia khoom tsis zoo, xws li qhov kub thiab txias, av noo, thiab tshav ntuj ncaj qha.
Kev laus ntawm cov roj hmab feem ntau nrog qee qhov tshwm sim tseem ceeb. Raws li qhov tshwm sim, cov khoom siv roj hmab tuaj yeem deform, ua nkig, tawv, tawg, pwm, plam gloss, thiab hloov xim. Nyob rau hauv cov nqe lus ntawm lub cev khoom, cov ntaub ntawv roj hmab yuav hloov nyob rau hauv o, rheological zog, thiab lwm yam. Nyob rau hauv cov nqe lus ntawm txhua yam khoom, lub tensile lub zog, elongation ntawm tawg, cuam tshuam lub zog, dabtsi yog khoov lub zog, compression npaum li cas, elasticity, thiab lwm yam kev ntsuas ntawm cov khoom siv roj hmab yuav txo.
Kev ntsuas los tiv thaiv kev laus ntawm cov roj hmab
1. Tshuaj tiv thaiv txoj kev
Txoj kev tiv thaiv tshuaj feem ntau inhibits lossis ncua kev laus cov tshuaj tiv thaiv los ntawm kev ntxiv cov tshuaj antioxidants rau cov khoom siv roj hmab. Feem ntau siv cov tshuaj antioxidants suav nrog amines thiab phenols. Cov tshuaj antioxidants no tuaj yeem tiv thaiv kev laus xws li cov pa oxygen thiab ultraviolet rays, yog li ncua kev pab cuam lub neej ntawm cov khoom siv roj hmab. Thaum xaiv cov tshuaj antioxidants, nws yog ib qho tsim nyog yuav tsum xaiv thiab tejzaum nws siv ntau cov tshuaj antioxidants ua ke raws li cov kev siv tshwj xeeb thiab cov kev cai ntawm cov khoom siv roj hmab kom ua tau zoo dua los tiv thaiv kev laus.
2. Txoj kev tiv thaiv lub cev
Txoj kev tiv thaiv lub cev yog ntxiv cov yeeb yaj kiab tiv thaiv rau ntawm qhov chaw ntawm cov khoom siv roj hmab kom tiv thaiv cov roj hmab los ntawm kev sib cuag ncaj qha nrog cov txheej txheem kev laus. Piv txwv li, txheej cov roj hmab saum npoo, ntxiv paraffin, siv cov tshuaj tiv thaiv lub teeb, los yog sib xyaw roj hmab thiab cov yas. Cov kev ntsuas no tuaj yeem txo qhov cuam tshuam ntawm ib puag ncig sab nraud ntawm cov roj hmab, yog li txuas ntxiv nws lub neej kev pabcuam.
3. Tswj kev ua haujlwm kub
Roj Hmab yog qhov ua rau muaj kev laus vim yog qhov kub thiab txias thaum lub sijhawm ua haujlwm, yog li qhov kev ua haujlwm kub yuav tsum tau tswj nruj me ntsis. Los ntawm kev ua kom zoo ntawm cov txheej txheem ntau lawm thiab txo lub sij hawm raug nyob rau hauv qhov chaw kub kub, qhov kev laus ntawm cov roj hmab tuaj yeem txo tau zoo.
4. Cia tej yam kev mob
Qhov chaw cia khoom ntawm cov khoom siv roj hmab tseem muaj feem cuam tshuam rau lawv cov kev laus. Cov khoom siv roj hmab yuav tsum tau khaws cia rau hauv qhov kub thiab txias, tsis tshua muaj av noo, qhov cua, thiab qhov chaw qhuav, tsis txhob tshav ntuj ncaj qha thiab ya raws. Qhov no tuaj yeem ua rau qeeb cov txheej txheem kev laus ntawm cov roj hmab thiab txuas ntxiv nws lub neej kev pabcuam.
Cov txheej txheem tshem tawm kev nyab xeeb
1. Kev tshuaj xyuas tsis tu ncua thiab hloov pauv
Cov khoom siv roj hmab hauv kev siv, xws liautomotive seals, cev seals, thiab lwm yam, yuav tsum tau kuaj xyuas tsis tu ncua. Thaum laus, tawg, thiab hnav thiab tsim kua muag hnyav, lawv yuav tsum tau hloov raws sijhawm. Tshwj xeeb tshaj yog rau cov khoom tseem ceeb xws li cov log tsheb, lawv cov kev laus thiab kev tsis zoo yuav cuam tshuam ncaj qha rau kev tsav tsheb, thiab yuav tsum tau hloov nruj me ntsis raws li lub voj voog hloov.
2. Xaiv cov khoom zoo
Thaum yuav cov khoom siv roj hmab, cov khoom lag luam uas muaj kev ntseeg tau zoo thiab kev ua haujlwm zoo tiv thaiv kev laus yuav tsum raug xaiv. Cov khoom siv roj hmab sib txawv muaj qhov sib txawv los tiv thaiv kev laus, thiab cov ntaub ntawv tsim nyog yuav tsum raug xaiv raws li kev siv tshwj xeeb thiab cov cai.
3. Txhim khu kev kawm txog kev nyab xeeb thiab kev tshaj tawm
Los ntawm kev ntxiv dag zog rau kev kawm txog kev nyab xeeb thiab kev tshaj tawm, txhim kho cov pej xeem kev paub txog roj hmab kev laus thiab kev puas tsuaj thiab nws cov kev nyab xeeb kev nyab xeeb. Cia tib neeg nkag siab txog qhov ua rau kev laus ntawm cov roj hmab, kev tiv thaiv kev laus, thiab hloov cov voj voog kom lawv tau txais kev saib xyuas thiab hloov cov khoom siv roj hmab hauv lub neej txhua hnub.
Xaus
Roj hmab aging yog ib tug complex txheej txheem uas muaj ntau yam. Los ntawm kev nkag siab txog cov laj thawj thiab qhov tshwm sim ntawm kev laus ntawm cov roj hmab, peb tuaj yeem tiv thaiv tau zoo dua thiab tswj qhov tshwm sim ntawm cov roj hmab laus, yog li ncua kev pab cuam lub neej ntawm cov khoom siv roj hmab thiab txo qhov kev pheej hmoo ntawm kev nyab xeeb.