Mona ke liphapang tseo re li akaretsang lipakeng tsa Trivalent le hexavalent chromes.
Phapang Pakeng Tsa Trivalent le Hexavalent Chromium
Hexavalentplating ea chromiumke mokhoa o tloaelehileng oa ho roala ka chromium (oo hangata o tsejoang e le chrome plating) mme o ka sebelisoa bakeng sa ho khabisa le ho sebetsa.Hexavalent chromium plating e finyelloa ka ho kenya li-substrates ka har'a bateng ea chromium trioxide (CrO3) le sulfuric acid (SO4).Mofuta ona oa plating oa chromium o fana ka kutu le ho hanyetsa ho apara, hammoho le boipiletso bo botle.
Karolo ea lebili la setereng sa chrome e nang le hexavalent
Hexavalent chromiumplatinge na le mefokolo ea eona, leha ho le joalo.Mofuta ona oa plating o hlahisa lihlahisoa tse 'maloa tse nkoang e le litšila tse kotsi, ho kenyelletsa le li-chromates tsa lead le barium sulfate.Hexavalent chromium ka boeona ke ntho e kotsi le carcinogen 'me e laoloa haholo ke EPA.Lilemong tsa morao tjena, li-OEM tsa likoloi tse kang Chrysler li entse matsapa a ho khutlisa li-chromium tse hexavalent ka li-finishing tse bonolo haholoanyane tsa tikoloho.
Chromium e nyenyaneke mokhoa o mong oamekhabiso ea chrome plating, 'me e nkoa e le sebaka se seng se sa silafatsang tikoloho ho fapana le chromium ea hexavalent, e nang le litšobotsi tse ngata tse tšoanang;joalo ka ha chrome e qeta ho qeta, li-trivalent chrome finishes li fana ka khanyetso le ho senya 'me li fumaneha ka mefuta e sa tšoaneng ea mebala.Trivalent chromium plating e sebelisa chromium sulfate kapa chromium chloride e le motsoako oa eona o ka sehloohong, ho e-na le chromium trioxide;ho etsa hore trivalent chromium e be chefo ho feta hexavalent chromium.
Grill e kopantsoeng ka chrome e ntšo ea trivalent holim'a nickel e khanyang
Le hoja ts'ebetso ea trivalent chromium plating e le thata ho laola, 'me lik'hemik'hale tse hlokahalang li bitsa chelete e ngata ho feta tse sebelisoang bakeng sa chromium ea hexavalent, melemo ea mokhoa ona e etsa hore e be le tlhōlisano le mekhoa e meng ea ho qeta.Ts'ebetso ea trivalent e hloka matla a fokolang ho feta ts'ebetso ea hexavalent mme e khona ho mamella litšitiso tsa hajoale, e etsa hore e be matla haholoanyane.Trivalent chromium e na le chefo e tlase e bolela hore e laoloa ka thata, e fokotsa litšila tse kotsi le litšenyehelo tse ling tsa ho latela melao.
Ka melaoana e mabapi le lintho tse kotsi e ntseng e eketseha United States le EU, tlhokahalo ea liphetho tse baballang tikoloho joalo ka trivalent chrome e ntse e eketseha.
Tharollo ea Hexavalent Chromium Plating
Li-deposit tse entsoeng ka chromium tse thata, tseo hangata e leng li-plating tse teteaneng, li sebelisoa haholo indastering ea merafo le ea lifofane le bakeng sa li-hydraulic le lisebelisoa tsa ho etsa tšepe.Li boetse li sebelisoa ho phethela lisebelisoa tsa bongaka le tsa ho buoa.
Hexavalent chromium electrolyte e hloka mohloli oa li-ion tsa chromium le li-catalyst tse le 'ngoe kapa ho feta e le hore li tle li phalle.Ho hlophisoa ha mokhoa oa setso, o bitsoang bath e tloaelehileng, e na le chromium ea hexavalent le sulfate e le eona feela e thusang.
Li-additives tse ka eketsoang mofuteng o tloaelehileng oa hexavalent chromium plating bath ho ntlafatsa ts'ebetso li bitsoa libate tse tsoakiloeng ka lebaka la hore li-additives li na le bonyane ntho e le 'ngoe ea tlatsetso ho tlatselletsa sulfate.
Tharollo ea Trivalent Chromium Plating
Li-electrolyte tsa litharollo tsa chromium plating tse tharo li fapana ka k'hemistri, empa kaofela li na le mohloli oa trivalent chromium, eo hangata e eketsoang joalo ka letsoai la sulfate kapa chloride.Li boetse li na le thepa e qhibilihisang e kopanang le chromium ho e lumella hore e phalle ka takatso ea ho eketsa conductivity ka tharollo.
Lisebelisoa tsa ho kolobisa li sebelisoa ho thusa karabelo ea deposition le ho fokotsa tsitsipano ea holim'a tharollo.Khatello e fokotsehileng ea holim'a metsi e felisa ho thehoa ha moholi ho anode kapa cathode.Ts'ebetso ea ho pola e sebetsa joalo ka khemistri ea ho hlapa ea Nickel ho feta bateng ea Hex chrome.E na le fensetere e nyane haholo ea ts'ebetso ho feta plating ea Chrome e hexavalent.Seo se bolela hore boholo ba liparamente tsa ts'ebetso li tlameha ho laoloa hantle, le ka nepo haholoanyane.Ts'ebetso ea Trivalent Chrome e phahame ho feta ea Hex.Deposit e ntle ebile e ka khahla haholo.
Hexavalent chromium plating e na le mefokolo ea eona, leha ho le joalo.E tsejoa e le carcinogen ea motho 'me e ka lebisa mathateng a tebileng a bophelo bo botle.Hopola se entseng Erin Brockovich lebitso la lelapa?Mofuta ona oa plating o hlahisa lihlahisoa tse 'maloa tse nkoang li le kotsi.
Trivalent chromium platinge na le botsoalle ho feta tikoloho ho feta hexavalent chromium;ts'ebetso ea electrodeposition ka kakaretso e amoheloa e le chefo e fetang makhetlo a 500 ho feta Chromium ea hexavalent.Molemo o moholo oa lits'ebetso tsa trivalent chromium ke hore e feto-fetoha le maemo.Phatlalatso ea plating e tšoana haholo, ho roala ha moqomo hoa khoneha bakeng sa chrome e nyenyane, e ke keng ea khoneha ka chrome e hexavalent.
Hexavalent Vs Trivalent Chromium
| Lintho | Hexavalent Chromium | Trivalent Chromium |
| Phekolo ea litšila | E turu | Bonolo |
| Ho Lahlela Matla | Mafutsana | E ntle |
| Polokeho | E sa bolokehang Haholo | Ho batla ho bolokehile;e tšoanang le Nickel |
| Ho mamella Tšilafalo | Hantle Hantle | Ha e le hantle |
| NSS le CASS | E tšoanang | E tšoanang |
| Ho hanyetsa ho chesa | Ha e ntle | Hantle haholo |
Lethathamo le bapisa likarolo tse ling tsa Hexavalent le Trivalent Chromium
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Nako ea poso: Nov-11-2023