"Kuwonongeka kwa varnish ndi vuto lofala m'mafuta ambiri opangira gasi.Kodi kuipitsidwa kwamtunduwu kuli ndi mawonekedwe a polar?Pali mapepala ambiri omwe amakambirana za kuipitsidwa kwa varnish, zomwe zimayambitsa ndi machiritso ake.M'mapepala ambiriwa, zinthu za polar zomwe zili ndi varnish zavomerezedwa ngati zotsimikizirika, koma kafukufuku wathu ndi zoyesera sizikugwirizana ndi izi.Maganizo anu ndi otani pankhaniyi?
Nthawi zambiri, varnish imadziwika kuti imakhala ndi zinthu za polar.Komabe, itha kukhalanso ndi zinthu zomwe sizili polar.Varnish sizovuta kufotokozera chifukwa palibe mtundu umodzi.Zinthu zambiri zimakhudza mtundu wa varnish yomwe imapanga, kuphatikizapo momwe amagwirira ntchito, mtundu wa mafuta ndi chilengedwe.
M'malo moyesera kuyika magawo enaake pazinthu za varnish, pansipa pali mndandanda wa zinthu 10 zomwe ziyenera kumveka bwino za varnish monga momwe zimagwirira ntchito pamafuta.
1. Mapangidwe a Varnish angayambe kuchokera ku makutidwe ndi okosijeni ndi ma polymerization a mafuta odzola ndi madzi ena amadzimadzi kapena kupsinjika komwe kumachititsa kuti matenthedwe awonongeke ndi dizili.Chithunzi chomwe chili pansipa chikuwonetsa njira zoyambirira zopangira varnish.Ngakhale pali zifukwa zina zambiri za varnish, izi ndizodziwika kwambiri.
2. Varnish nthawi zambiri imakhala ndi kukula kwa submicron ndipo imakhala ndi zomatira za oxide kapena carbonaceous material.Zomwe zimapangidwira zimatha kupangidwa kuchokera kumafuta a thermo-oxidative a mamolekyu amafuta oyambira ndi zowonjezera komanso kuvala zitsulo ndi zonyansa monga dothi ndi chinyezi.Kusintha kwa cyclic pakati pa kutentha ndi kuziziritsa kumawonetsa mafuta pakuwonongeka kwamafuta ndi okosijeni.
3. Mapangidwe a varnish ndi sludge amachokera ku mpweya wa ma molecular-weight insoluble oxides kuchokera ku mafuta.Monga zinthu za polar, ma oxides awa amakhala ndi kusungunuka kochepa mumafuta omwe si a polar monga mafuta a turbine.
4. Izi zimapanga filimu yopyapyala, yosasungunuka yomwe imaphimba malo amkati a ziwalo za makina ndipo imayambitsa kumamatira ndi kusagwira ntchito kwa ziwalo zosuntha zotsekedwa ngati ma servo-valve.
5. Maonekedwe a varnish pazitsulo zamkati zamakina amatha kusintha kuchokera ku mtundu wa tani kupita ku zinthu zakuda ngati lacquer.
6. Varnish imathanso kuyambitsidwa ndi thovu la mpweya lomwe limakhala ndi kupsinjika kwa adiabatic m'malo olemetsa.Ma thovu a mpweyawa amapanikizidwa mwachangu, zomwe zimapangitsa kuwonongeka kwamafuta ndi zowonjezera.
7. Pazigawo zoyamba za okosijeni ndi mapangidwe a oxidation byproducts, magulu a Gulu II amatsutsana kwambiri.Komabe, momwe ma oxidation byproducts ochulukira amapangika, masheya oyambirawa amatha kukhala pachiwopsezo cha zovuta za varnish chifukwa cha kuchuluka kwawo kwa polarity.
8. Zinthu zogwirira ntchito monga madera osiyanasiyana othamanga kwambiri, nthawi zokhala nthawi yayitali komanso zowononga ngati madzi zimatha kulimbikitsa okosijeni.
9. Kuwonjezera pa mdima wa mafuta, mphamvu ya varnish ikhoza kuyang'aniridwa mwachiwonekere pozindikira zotsalira zilizonse, phula kapena gummy-ngati zinthu zooneka ngati magalasi, makina amkati, zosefera ndi zolekanitsa centrifugal.
10. Kuthekera kwa vanishi kungathenso kuyang'aniridwa kupyolera mu kusanthula mafuta pogwiritsa ntchito mawonekedwe a Fourier transform infrared (FTIR) spectroscopy, ultracentrifuge, colorimetric analysis, gravimetric analysis ndi membrane patch colorimetry (MPC).
Nthawi yotumiza: May-29-2022