Varnish
HOAKAKA
He waihona lahilahi, paʻakikī, ʻālohilohi, ʻaila-inoluble, i haku mua ʻia me ke koena organik, a hiki ke wehewehe ʻia e ka ikaika kala.ʻAʻole hiki ke wehe ʻia ma ka holoi ʻana me kahi mea holoi holoi maʻemaʻe, maloʻo, palupalu, lint-free a kū i nā mea hoʻoheheʻe saturated.Hiki ke ʻokoʻa kona waihoʻoluʻu, akā ʻike pinepine ʻia i ka hina hina, ʻeleʻele a i ʻole amber.Puna: ASTM D7843-18
PEHEA ANA I KA VARNISH
ʻO ka maʻamau, hoʻohaʻahaʻa nā lubricants i ka lawelawe ma muli o ke kemika, thermal, mechanical stress ka mea e hoʻolalelale i ka hopena o ka ʻaila oxidation a hoʻomaka ka varnish me ka oxidation.
-Kemika:Nui nā hopena kemika i ka wā o ka ʻaila.Alakaʻi ʻia ka ʻaila i nā huahana decomposition he nui, me nā ʻāpana insoluble a me nā waikawa.ʻO ka wela a me ka loaʻa ʻana o nā mea metala (Iron, Copper) e hoʻolalelale i ke kaʻina hana.Eia kekahi, ʻoi aku ka maʻalahi o nā aila aerated i ka Oxidation.
-Maikaʻi:Ke hoʻokomo ʻia nā ʻea ea i loko o ka ʻaila, hiki mai ka pōʻino nui o ka ʻaila ma muli o nā kūlana i kapa ʻia ʻo PID (Pressure-induced Dieseling) a i ʻole PTG (Pressure-induced Thermal Degradation).ʻOi aku ka mahana o ka ʻāina ma mua o 538 ℃ i ka wā e hāʻule ai nā ʻōpū o ka ea ma lalo o ke kaomi kiʻekiʻe, a ke alakaʻi nei hoʻi i ka hoʻohaʻahaʻa wela.
-Mechanical:Hana ʻia ka "ʻako" i ka wā e haehae ʻia ai nā molekala ʻaila i ka wā e kahe ana ma waena o nā ʻili mīkini e neʻe ana.
Hana ʻia ka polymerization i ka hui ʻana o nā huahana oxidation & additive reactions a hana i nā molekole kaulahao lōʻihi me ke kaumaha molekala kiʻekiʻe.Ua polarized kēia mau mole.ʻO ka nui o ka polymerization molekala e pili ana i ka mahana a me ka neʻe ʻana o nā huahana o ka oxidation.
Hōʻike ia i ka hiki ke hoʻoheheʻe i nā molekala i loko o ka hopena i hoʻopili pololei ʻia e ka mahana.Ke hana mau ʻia nei nā huahana o ka oxidation, ua kokoke ka wai i kahi kiko saturation.
ʻO ke kaʻina hana no ka waiho ʻana o ka particulate varnish hiki ke hoʻohuli.I ka hapanui o nā hihia, i ka wā e puka ai ka varnish, hiki ke hoʻihoʻi ʻia i loko o ka wai a wāwahi inā piʻi ka solubility o ka lubricant.
ʻAʻole hiki i ka wai ke hoʻoheheʻe i nā molekole polymerized hou i ka hiki ʻana o ka saturation point a i ʻole ke kahe ʻana o ka wai ma nā ʻāpana ʻoluʻolu (Ke emi ka solubility ke hāʻule ka mahana).No ka mea ʻaʻole hiki ke mālama ʻia nā huahana oxidative hou aʻe i ka hopena, e hoʻoheheʻe lākou a hana i nā ʻāpana palupalu (sludge/varnish).
He maʻalahi nā ʻāpana palupalu hiki ʻole ke hoʻohui i kekahi i kekahi a hana i nā ʻāpana polarized nui aʻe me ke kaumaha molekala kiʻekiʻe.
ʻOi aku ka polar o nā metala ma mua o kēia mau ʻāpana polarized no laila e hōʻiliʻili maʻalahi lākou ma ka ʻili metala (nā ʻāpana ʻoluʻolu, hoʻomaʻemaʻe maikaʻi, kahe haʻahaʻa) kahi i hoʻokumu ʻia ai kahi papa paʻa (Varnish) a hoʻopili i nā mea ʻē aʻe.Pēlā i hana ʻia ai ka varnish
ʻO Varnish Harzds
◆ʻO ke kuʻi ʻana a me ka hopu ʻana i nā kiwi
◆ʻO nā bearings wela loa
◆Hoʻemi i ka pono o nā mea hoʻololi wela
◆Hoʻonui i ka ʻaʻahu ma luna o nā mea koʻikoʻi a me nā valve
◆Hoʻopōkole ʻia ke ola o nā mīkini, lubricant, kānana a me nā sila
KE KANAWAI NO KA HOIKE VARNISH
Ma muli o ke kumu kūʻai nui o ka noho ʻana o ka varnish, pono ʻoe e nānā i ke ʻano o ka hiki ke varnish i kāu ʻōnaehana lubricating.ʻO nā ʻenehana i hoʻohana nui ʻiaMembrane Patch Colorimetry(MPC ASTM7843).Lawe kēia ʻano hoʻāʻo i nā mea haumia hiki ʻole ke hoʻoheheʻe ʻia mai kahi laʻana o ka ʻaila turbine in-service ma luna o kahi pā (me ka membrane 0.45µm) a ʻike ʻia ke kala o ka pā membrane e kahi spectrophotometer.Hōʻike ʻia nā hopena ma ke ʻano he ΔE waiwai.
NA HANA NO KA HOPE VARNISH
| Hoʻohālike | ʻO Varnish hiki ke hoʻoheheʻe | ʻO Varnish hiki ʻole ke hoʻoheheʻe | Wai |
|---|---|---|---|
| WVDJ | √ | √ | √ |
| WVD-II | √ | √ | |
| WJD | √ | ||
| WJL | √ |