Abstract:
Black chromium platingyave ichiwanikwa mune zvekutengesa kwemakore anopfuura 50.Iyo yekutanga dema chromium plating inotsanangurwa muMil Std 14538 iyo inoisa dema chromium kubva kunehexavalent chromiumelectrolyte.Kwemakore gumi apfuura, kwave nekusimudzirwa kwekutengeserana kweblack chromium deposits kubva kutrivalent chromiumelectrolyte.Iri bepa rinoongorora maitiro edhipoziti uye kufunga kwekushanda kweaya akafanana, asiakasiyana chromium platingdeposits.
Nhanganyaya
Beauty and the Beast (chiFrench: La Belle et la Bête) ingano yakanyorwa nemunyori wechiFrench Gabrielle-Suzanne Barbot de Villeneuve uye yakatsikiswa muna 1740.trivalent uyehexavalentchromium-yakavakirwa dema chromium plating maitiro.
Mufananidzo 1 unofananidza kutaridzika kweiyo trivalent uye hexavalent process solutions.Kuruboshwe kune chromium sulfate-based trivalent black chromium plating process.Mushonga weruvara wakadzika bhuruu, tangi iri kuchena, uye mhinduro yakagadzikana.Takasarudza zviri nyore kuti chirongwa ichi chaizonzi Runako mukuratidzira uku.
Kurudyi kune chromium trioxide-based black chromium plating process.Mushonga wemuvara wakatsvuka tsvuku.Munguva ye electroplating, hydrogen gasi inoshanduka, iyo inogona kugadzira hexavalent chromium-ine mhute.Mhute iyi inofanirwa kudzorwa nemichina yekunyorova kana kuti push-pull ventilation.Iyo hexavalent dema chromium, ingangoita kune yese yeiyi mharidzo, ichanzi ndiyo yakanyanya kunaka.
Mufananidzo 1 - Kuenzanisa kwe trivalent uye hexavalent dema chromium plating maitiro.
Chinangwa chebasa iri ndechekuongorora mamwe dema chromium electroplating deposits uye kuona mashandisiro anoshanda uye kukodzera kweaya machira mukati uye kunze kwemotokari uye zvekutengesa zvikumbiro.Chitarisiko chiri pamaitiro ekuita kwemuviri, anosanganisira dziviriro yecorrosion, kuramba kukwenya, kuramba kwemavara uye kutaridzika kwezvose zvine hexavalent uye trivalent-based black chromium deposits.Mhedzisiro yacho inofanirwa kushanda segwara rinoshanda rekusarudza iwo akanakisa musanganiswa weakapfava machira kuti awane kuita kunotarisirwa.Isu tinotsvagawo kuona kuti dema chromium deposits inofananidzwa sei nedzimwe nzira dzeblack coating, dzinosanganisira PVD, nhema poda jasi uye dema electroless nickel.
Background
Patents yeblack chromium plating yakatanga muna 1952. Patent yekutanga ine chekuita ne electroplating black chromium, yakapihwa Gilbert naBuhman. zvidimbu zvepfuti, zvombo zvehondo uye midziyo yehondo paRock Island Arsenal.1 Zvimwe zvibvumirano zvakaiswa neWestinghouse Electric muna 1956 uye Kewanee Oil Company (Harshaw Chemical), yakabudiswa muna 1971.2,3 The Harshaw Chemical patent, pakupedzisira yakaendeswa kuburikidza neM & T Chemicals, uye ikozvino iri kutengeswa pasi peAtotech Chemical tradename Econo-chrome BK.
Mapatent ekutanga etrivalent chromium platingyakadzokera kumavambo a1970. Gyllenspentz naRenton weAlbright naWilson;pamwe neTremmel yeOMI (yava kunzi MacDermid Enthone), vaive mumwe wemapiyona ekutanga kuita kugadzirwa kwe trivalent chromium electroplating yekugezera.Basa reTremmel rakanangana nekushandiswa kwemishonga ye thiazole, nepo Gyllenspentz naRenton basa rakanangana nekushandiswa kwefomati, acetate, bromide uye ammonium kuwana dhipoziti yekutengeserana. inowanzoshandiswa iye zvino zviri nyore kudzora.
Kuenzanisa Kwekushanda
Tafura 1 inoenzanisa maitiro ekushanda ezvose chloride uye sulfate shanduro ye trivalent black chromium uye hexavalent black chromium maitiro.3 Musiyano wekutanga uye unonyanya kukosha wekushanda uri mu electrolyte.Iyo trivalent dema chromium maitiro anoshandisa chloride kana sulfate simbi munyu ine chromium ye electrolyte, nepo hexavalent dema chromium inoshandisa chromium trioxide (kana chromic acid) kune chikuru chikamu.Iyo trivalent yekugezera inoshanda pa pH ye 2-4 nepo hexavalent black chromium inoshanda pa pH isingasviki 1. Kupisa kwekushanda kwakafanana mune zvese zvitatu zvinogadzirisa.
Dzvanya pano kuti udzidze:Musiyano pakati peTrivalent Chromium neHexavalent Chromium
Tafura 1 - Kuenzanisa kwekushanda kwechloride Cr(III), sulfate Cr(III) uye Cr(VI)
Maitiro.
Kana iri yekukanda nekuvhara, iyo trivalent dema chromium maitiro ane yakanaka yekukanda simba uye inovhara zvikamu zvakanyanya pasina kushandisa yakakosha anode anode.Standard racking dhizaini inogona kushandiswa.
Nekudaro, izvi hazvisizvo nezve hexavalent dema chromium process.Kubudirira kwakashata kunotungamirira kukushaya kwekukanda uye kuvhara simba.Pasina yakakosha rack fixturing (kureva, ebetsero anode), iyo dema chromium dhipoziti ichava nemimvuri yakawanda yegrey uye grey / dema, uye akati wandei emakemikari anoumba anofanirwa kuve pakati nepakati kune dema rakanyanya pamusoro pese ikozvino density renji.
About CheeYuen
Yakatangwa muHong Kong muna 1969,CheeYuenndiye mupi wemhinduro wekugadzira chikamu chepurasitiki uye kurapwa kwepamusoro.Yakashongedzerwa nemichina yepamusoro uye mitsara yekugadzira (1 tooling uye jekiseni rekugadzira nzvimbo, 2 electroplating mitsara, 2 pendi mitsara, 2 PVD mutsara uye nevamwe) uye inotungamirwa nechikwata chakazvipira chenyanzvi uye matekiniki, CheeYuen Surface Treatment inopa mhindurochromed, kupenda&PVD zvikamu, kubva paturusi dhizaini yekugadzira (DFM) kuenda kuPPAP uye pakupedzisira kusvika kupedzisa chikamu kuendesa pasirese.
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Nguva yekutumira: Feb-26-2024