I-Varnish

INCAZELO

Idiphozithi encane, eqinile, ecwebezelayo, engancibiliki uwoyela, ehlanganiswe ngokuyinhloko izinsalela zezinto eziphilayo, futhi ecaciseka kalula ngokushuba kombala.Ayisuswa kalula ngokusulwa ngento yokusula ehlanzekile, eyomile, ethambile, engenalinti futhi imelana nezincibilikisi ezigcwele.Umbala wayo ungahluka, kodwa ngokuvamile uvela ngombala ompunga, onsundu noma o-amber.Umthombo: ASTM D7843-18

SAKHIWA KANJANI ISI-VARNISH

Imvamisa, izinto zokugcoba ziyawohloka emsebenzini ngenxa yengcindezi yamakhemikhali, eshisayo, esheshisa ukusabela kwe-oxidation kawoyela kanye nokwakheka kwevarnish kuqala nge-oxidation.

Isigaba 1: I-oxidation

-Amakhemikhali:Ukusabela kwamakhemikhali amaningi kwenzeka njengoba iminyaka kawoyela.I-oxidation kawoyela iholela emikhiqizweni eminingi yokubola, okuhlanganisa izinhlayiya ezingancibiliki nama-asidi.Ukushisa nokuba khona kwemininingwane yensimbi (Iron, Copper) kusheshisa inqubo.Ukwengeza, amafutha ane-aerated kakhulu angangenwa kalula yi-Oxidation.

I-Thermal:Lapho amabhamuza omoya efakwa emafutheni, ukwehluleka okukhulu kwamafutha kungase kwenzeke ngenxa yezimo ezaziwa ngokuthi i-PID (I-Pressure-induced Dieseling) Noma i-PTG (Ukuwohloka Kokushisa Okubangelwa Ukucindezela).Amazinga okushisa asendaweni adlula ku-538℃ lapho amabhamuza omoya ewa ngaphansi kwengcindezi ephezulu, okubuye kuholele ekonakaleni kokushisa.

-Mechanical:“Ukugunda” kwenzeka lapho ama-molecule kawoyela ehlukana phakathi njengoba egeleza phakathi kwezindawo ezihambayo.

Isigaba 2: I-Polymerization

I-Polymerization kwenzeka njengoba imikhiqizo ye-oxidation nokusabela okungeziwe kuhlangana futhi kwakha ama-molecule amaketanga amade anesisindo esiphezulu samangqamuzana.Lawa ma-molecule ahlukanisiwe.Izinga le-polymerization yamangqamuzana lincike ekushiseni nasekuhlanganiseni kwemikhiqizo ye-oxidation.

Isigaba sesi-3: Ukuncibilika

Ibonisa amandla okuncibilikisa ama-molecule ngaphakathi kwekhambi elithinteka ngokuqondile izinga lokushisa.Njengoba imikhiqizo ye-oxidation idalwa ngokuqhubekayo, uketshezi luseduze nendawo yokugcwala.

Inqubo ebhekele ukufakwa kwe-varnish yezinhlayiya iyabuyiselwa emuva.Ezimweni eziningi, uma i-varnish yakhiwe, ingaphinde ifakwe oketshezini futhi iphule uma ukuncibilika kwe-lubricant kukhuphuka.

Isigaba 4: Imvula

Uketshezi alukwazi ukuncibilikisa ama-molecule amasha enziwe nge-polymerized lapho izinga lokugcwala lifinyelelwa noma uketshezi ludlula ezindaweni ezipholile (Ukuncibilika kuncipha lapho izinga lokushisa lehla).Njengoba imikhiqizo eyengeziwe ye-oxidative ingenakukwazi ukubanjelwa isisombululo, iyaphuma futhi yakhe izinhlayiya ezithambile (udaka/i-varnish).

Isigaba 5: I-Agglomeration

Izinhlayiya ezithambile ezingancibiliki kulula ukuhlanganisana futhi zakha izinhlayiya ezinkudlwana ezihlukanisiwe ezinesisindo samangqamuzana.

Isigaba sesi-6: I-varnish eyakhiwe

Izinsimbi ziyi-polar kakhulu kunalezi zinhlayiya ze-polarized ukuze zinqwabelane kalula endaweni yensimbi (izindawo ezipholile, indawo ecacile, ukugeleza okuphansi) lapho ungqimba olunamathelayo(Varnish) lwakhiwe futhi luhehe izinhlayiya eziningi ezinamathela kukho.Yakha kanjalo-ke i-varnish

I-Varnish Harzds

◆Ukunamathela nokubamba ama-valve

◆Ama-bearings ashise ngokweqile

◆Ukunciphisa ukusebenza kwezishintshi zokushisa

◆Ukwenyuka kokuguga ezingxenyeni ezibalulekile nama-valve

◆Ukuphila okufushane kweMishini, okokugcoba, izihlungi nezimpawu

INDLELA YOKUTHOLA ISI-VARNISH

Ngenxa yomphumela obizayo wokuba khona kwe-varnish, kufanele uqaphe isimo samandla e-varnish ohlelweni lwakho lokugcoba.Amasu amukelwa kabanzi yiI-Membrane Patch Colorimetry(MPC ASTM7843).Le ndlela yokuhlola ikhipha ukungcola okungancibiliki kusampula kawoyela we-turbine yangaphakathi kwesevisi kupetshi (ene-membrane engu-0.45µm) futhi umbala wepetshi ye-membrane uhlaziywa nge-spectrophotometer.Imiphumela ibikwa njengevelu ye-ΔE.

IZIXAZULULO ZOKUKUSWA KWE-VARNISH

Imodeli	I-Varnish encibilikayo	I-Varnish engancibiliki	Amanzi
I-WVDJ	√	√	√
I-WVD-II	√	√
I-WJD		√
WJL		√