Varnish

BAYANI

Siriri, mai wuya, mai ban sha'awa, ajiya maras narkewa mai, wanda aka haɗa da farko na ragowar kwayoyin halitta, kuma mafi saurin bayyanawa ta ƙarfin launi.Ba a sauƙin cire shi ta hanyar shafa tare da tsabta, bushe, laushi, kayan shafa mara lint kuma yana da juriya ga cikakken kaushi.Launin sa na iya bambanta, amma yawanci yakan bayyana da launin toka, launin ruwan kasa ko amber.Saukewa: ASTM D7843-18

YADDA AKE SAMUN VARNISH

Yawanci, man shafawa suna raguwa a cikin sabis saboda sinadarai, thermal, damuwa na inji wanda ke haɓaka ɗaukar iskar shaka mai kuma samuwar varnish yana farawa da iskar shaka.

Mataki na 1: Oxidation

- Kimiyya:Yawancin halayen sunadarai suna faruwa yayin da shekarun mai.Oxidation na man yana haifar da samfuran bazuwar da yawa, gami da ɓangarorin da ba su narkewa da acid.Zafi da kasancewar bayanan ƙarfe (Iron, Copper) suna haɓaka aikin.Bugu da ƙari, mai mai yawan iska ya fi sauƙi ga Oxidation.

-Thermal:Lokacin da kumfa mai iska ya shiga cikin mai, mummunan gazawar mai na iya faruwa saboda yanayin da aka sani da PID (Matsi-induced Diesel) ko PTG (Matsi-induced Thermal Deradation).Yanayin da aka keɓe ya wuce 538 ℃ lokacin da kumfa na iska ke rushewa a ƙarƙashin matsanancin matsin lamba, wanda kuma yana haifar da lalatawar thermal.

- Injiniya:“Yankewa” yana faruwa ne a lokacin da ƙwayoyin mai suka ɓarke yayin da suke gudana tsakanin filaye masu motsi.

Mataki na 2: Polymerization

Polymerization yana faruwa yayin da samfuran oxidation & haɓaka halayen haɓaka suka haɗu da ƙirƙirar ƙwayoyin sarƙoƙi mai tsayi tare da nauyin kwayoyin mafi girma.Wadannan kwayoyin sun zama polarized.Matsakaicin adadin polymerization ya dogara da zafin jiki da yawan abubuwan da ake samu na iskar shaka.

Mataki na 3: Solubility

Yana nuna ikon narkar da kwayoyin halitta a cikin maganin da zafin jiki ya shafa kai tsaye.Kamar yadda samfurori na oxidation ke ci gaba da ƙirƙira, ruwan yana kusa da ma'anar jikewa.

Tsarin da ke da alhakin ƙaddamar da ɓarna na varnish mai jujjuyawa ne.A mafi yawan lokuta, da zarar varnish ya zama, za a iya sake dawo da su cikin ruwa kuma a rushe idan solubility na mai ya karu.

Mataki na 4: Hazo

Ruwan ba zai iya narkar da sabbin ƙwayoyin polymerized ba yayin da madaidaicin madaidaicin ya kai ko kuma ruwa ya ratsa cikin wurare masu sanyi (Mai narkewa yana raguwa lokacin da zafin jiki ya faɗi).Kamar yadda ƙarin samfuran oxidative ba za a iya riƙe su a cikin bayani ba, suna haɓakawa kuma suna samar da barbashi masu laushi (sludge/varnish).

Mataki na 5: Agglomeration

Barbashi masu laushi maras narkewa suna da sauƙin haɓaka juna kuma suna samar da barbashi masu girma dabam tare da nauyin kwayoyin mafi girma.

Mataki na 6: Varnish kafa

Karfe sun fi ƙarfin iyaka fiye da waɗannan ɓangarorin polarized don samun sauƙin tarawa akan saman ƙarfe (yanayin sanyi, kyawawa mai kyau, ƙarancin kwarara) inda aka kafa Layer mai ɗanɗano (Varnish) kuma yana jan hankalin ƙarin barbashi manne da shi.Haka varnish ya samu

Varnish Harzds

◆Dankowa da kama bawuloli

◆Ƙunƙarar zafi

◆Rage tasirin masu musayar zafi

◆Ƙarfafa lalacewa akan abubuwa masu mahimmanci da bawuloli

◆Takaitaccen rayuwar Injina, mai mai, tacewa da hatimi

HANYA DOMIN GANO VERNISH

Saboda tsadar sakamakon kasancewar varnish, Dole ne ku sanya ido kan yanayin yuwuwar varnish a cikin tsarin mai.Dabarun da aka fi amfani dasu shineMembrane Patch Colorimetry(MPC ASTM7843).Wannan hanyar gwajin tana fitar da gurɓataccen gurɓataccen abu daga samfurin man turbine a cikin sabis akan faci (tare da membrane 0.45µm) kuma ana tantance launin facin membrane ta hanyar spectrophotometer.Ana ba da rahoton sakamakon azaman ƙimar ΔE.

MAGANIN CUTAR varnish

Samfura	Varnish mai narkewa	Varnish mara narkewa	Ruwa
WVDJ	√	√	√
WVD-II	√	√
WJD		√
WJL		√