Nazi kusiyana komwe timafotokozera mwachidule pakati pa Trivalent ndi hexavalent chromes.
Kusiyana Pakati pa Trivalent ndi Hexavalent Chromium
Hexavalentchromium platingndi njira yachikhalidwe yopangira chromium plating (yomwe imadziwika kuti chrome plating) ndipo imatha kugwiritsidwa ntchito pokongoletsa ndi kumaliza ntchito.Hexavalent chromium plating imatheka mwa kumiza magawo mu bafa la chromium trioxide (CrO3) ndi sulfuric acid (SO4).Mtundu uwu wa chromium plating umapereka dzimbiri ndi kukana kuvala, komanso kukopa kokongola.
Chiwongolero chamagalimoto chigawo cha hexavalent chrome mapeto
Hexavalent chromiumplatingali ndi kuipa kwake, komabe.Kuyika kwamtunduwu kumapanga zinthu zingapo zomwe zimawonedwa ngati zinyalala zowopsa, kuphatikiza lead chromates ndi barium sulfate.Hexavalent chromium palokha ndi chinthu chowopsa komanso carcinogen ndipo imayendetsedwa kwambiri ndi EPA.M'zaka zaposachedwa, ma OEM amagalimoto monga Chrysler ayesetsa kuti asinthe ma hexavalent chromium ndi kumaliza kwawoko bwino.
Chromium yachitatundi njira ina yazokongoletsera za chrome, ndipo imatengedwa ngati njira yosamalira zachilengedwe yofananira ndi hexavalent chromium, yokhala ndi zambiri zofanana;monga hexavalent chrome amamaliza, trivalent chrome mapeto amapereka zikande ndi dzimbiri kukana ndipo amapezeka zosiyanasiyana mitundu options.Trivalent chromium plating imagwiritsa ntchito chromium sulfate kapena chromium chloride monga chopangira chake chachikulu, m'malo mwa chromium trioxide;kupangitsa trivalent chromium kukhala wapoizoni kuposa chromium ya hexavalent.
Grill yophatikizidwa mu chrome yakuda ya trivalent pamwamba pa nickel yowala
Ngakhale njira ya trivalent chromium plating ndiyovuta kuwongolera, komanso mankhwala ofunikira okwera mtengo kuposa omwe amagwiritsidwa ntchito pa hexavalent chromium, ubwino wa njirayi umapangitsa kuti ikhale yokwera mtengo ndi njira zina zomaliza.Njira ya trivalent imafuna mphamvu zochepa kusiyana ndi ndondomeko ya hexavalent ndipo imatha kupirira zosokoneza zamakono, ndikupangitsa kuti ikhale yolimba.Kuchepa kwa kawopsedwe ka trivalent chromium kumatanthauza kuti imayendetsedwa mosamalitsa, kuchepetsa zinyalala zowopsa ndi ndalama zina zotsatiridwa.
Ndi malamulo okhudza zinthu zowopsa zomwe zikuchulukirachulukira ku US ndi EU, kufunikira kokhala ndi malo ochezeka ndi chilengedwe ngati chrome ya trivalent kukukulirakulira.
Hexavalent Chromium Plating Solution
Madipoziti olimba a chromium, omwe nthawi zambiri amakhala okhuthala kwambiri, amagwiritsidwa ntchito kwambiri m'mafakitale amigodi ndi ndege komanso ma hydraulic ndi zida zopangira zitsulo.Amagwiritsidwanso ntchito pomaliza zida zamankhwala ndi opaleshoni.
Hexavalent chromium electrolytes imafuna gwero la ayoni a chromium ndi chothandizira chimodzi kapena zingapo kuti apangire mbale.Kapangidwe ka njira yachikhalidwe, yotchedwa bath wamba, imakhala ndi hexavalent chromium ndi sulfate monga chothandizira chokha.
Zina zowonjezera zomwe zitha kuwonjezeredwa kumadzi osambira a hexavalent chromium plating kuti apititse patsogolo njirayi amatchedwa mabafa osakaniza oyambitsa chifukwa zowonjezerazo zimakhala ndi chothandizira chimodzi kuwonjezera pa sulfate.
Trivalent Chromium Plating Solution
Ma electrolyte a trivalent chromium plating solutions amasiyana chemistry, koma onse amakhala ndi gwero la trivalent chromium, yomwe nthawi zambiri imawonjezedwa ngati sulfate kapena mchere wa chloride.Amakhalanso ndi zinthu zosungunulira zomwe zimaphatikizika ndi chromium kuti zilole kuti ziwonjezeke chifukwa chofuna kuwonjezera ma conductivity mu yankho.
Zinthu zonyowetsa zimagwiritsidwa ntchito kuthandizira pakuyika komanso kuchepetsa kupsinjika kwa yankho.Kuthamanga kwapansi kwapansi kumathetsa kupangika kwa nkhungu pa anode kapena cathode.Njira yopangira plating imagwira ntchito ngati chemistry yosambira ya Nickel kuposa kusamba kwa Hex chrome.Ili ndi zenera locheperako kuposa plating ya Chrome.Izi zikutanthauza kuti magawo ambiri amachitidwe ayenera kuyendetsedwa bwino, komanso molondola kwambiri.Kuchita bwino kwa Trivalent Chrome ndikokwera kuposa kwa Hex.Deposit ndi yabwino ndipo ikhoza kukhala yokongola kwambiri.
Hexavalent chromium plating ili ndi zovuta zake, komabe.Imadziwika kuti carcinogen yamunthu ndipo imatha kuyambitsa mavuto akulu azaumoyo.Kumbukirani zomwe zidapangitsa Erin Brockovich kukhala dzina lanyumba?Kuyika kwamtunduwu kumapanga zinthu zingapo zomwe zimawonedwa ngati zowopsa.
Kuyika kwapang'onopang'ono kwa chromiumndi wochezeka kwambiri ndi chilengedwe kuposa chromium ya hexavalent;njira ya electrodeposition imavomerezedwa kuti imakhala yocheperapo nthawi 500 kuposa Chromium ya hexavalent.Phindu lalikulu la njira za trivalent chromium ndikuti zimasinthasintha.Kugawa kwa plating kumakhala kofanana, kuyika kwa migolo ndi kotheka kwa trivalent chrome, zomwe sizingatheke ndi hexavalent chrome.
Hexavalent Vs Trivalent Chromium
| Zinthu | Hexavalent Chromium | Trivalent Chromium |
| Chithandizo cha Zinyalala | Zokwera mtengo | Zosavuta |
| Kuponya Mphamvu | Osauka | Zabwino |
| Chitetezo | Osatetezeka Kwambiri | Otetezeka pang'ono;zofanana ndi Nickel |
| Kulekerera Kuipitsidwa | Zabwino Kwambiri | Osati ngati Chabwino |
| NSS ndi CASS | Zofanana | Zofanana |
| Kukana kuyaka | Zosakhala bwino | Zabwino kwambiri |
Tebulo loyerekeza zinthu zina za Hexavalent ndi Trivalent Chromium
About CheeYuen
Inakhazikitsidwa ku Hong Kong mu 1969,CheeYuenndi wopereka yankho kwa pulasitiki gawo kupanga ndi pamwamba mankhwala.Okonzeka ndi makina apamwamba ndi mizere kupanga (1 tooling ndi jekeseni akamaumba pakati, 2 electroplating mizere, 2 penti mizere, 2 PVD mzere ndi ena) ndi kutsogoleredwa ndi gulu odzipereka a akatswiri ndi amisiri, CheeYuen pamwamba Chithandizo amapereka turnkey njira kwachromed, kujambula&Zithunzi za PVD, kuchokera pakupanga zida zopangira (DFM) kupita ku PPAP ndipo pamapeto pake mpaka kumaliza kutumizira magawo padziko lonse lapansi.
Wotsimikiziridwa ndiIATF16949, ISO9001ndiISO 14001ndi audited ndiVDA 6.3ndiMtengo CSR, CheeYuen Surface Treatment yakhala yodziwika bwino kwa ogulitsa komanso othandizana nawo ambiri odziwika bwino opanga magalimoto, zida zamagetsi, ndi zosamba, kuphatikiza Continental, ALPS, ITW, Whirlpool, De'Longhi ndi Grohe, ndi zina.
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Nthawi yotumiza: Nov-11-2023