Cadmium plating rau fastenersyog qhov kev kho mob saum npoo av dav siv nyob rau hauv aerospace, tub rog, marine, thiab ib puag ncig corrosive heev. Cadmium plating muab cov kev tiv thaiv corrosion zoo heev thiab, nyob rau qee qhov chaw ib puag ncig, ouperforms zinc plating. Hauv qab no yog cov lus qhia ntxaws heev:
1. Cadmium plating rau lub fasteners?
Cadmium plating muaj txheej txheej txheej txheej ntawm cadmium hlau (CD) mus rau qhov chaw ceev, thiab lwm yam, thiab kev sib txhuam. Tshwj xeeb, Cadmium-Plated Fasteners zoo rau kev tiv thaiv ntsev corrosion thiab ua tau zoo nyob rau hauv kev kub siab thiab muaj kev kub siab ib puag ncig.
2. Qhov zoo ntawm cadmium plating
Zoo heev corrosion:
Cadmium plating muaj qhov zoo tiv taus corrosion ntau dua zinc plating nyob rau hauv cov tub rog, huab cua, lossis ib puag ncig.
Ua cov cadmium oxide tiv thaiv txheej, zoo tiv thaiv cov xeb substrate.
Yus lubrication:
Kev sib txhuam qis qis coefficient, haum rau cov fasteners xav tau meej torque tswj.
Txo cov galling, qaug dab peg, thiab hnav teeb meem.
Superiorical Conductivity:
Dav siv nyob rau hauv Aerospace thiab Electronics muaj kev lag luam los muab kev sib cuag hluav taws xob ruaj khov.
Kub-Kub Kuj:
Saib xyuas cov txiaj ntsig kev tiv thaiv tau ruaj khov hauv qab 235 degree, haum rau qhov chaw siab xws li tshuab hluav taws xob.
Hwj txwv:
Yooj yim rau weld piv rau zinc plating, tsis muaj kev cuam tshuam vuam zoo.
3. Cadmium plating txheej txheem
Cadmium plating feem ntau ua yeeb yam siv cov txheej txheem electroplating, uas suav nrog cov kauj ruam hauv qab no:
(1) npaj npaj
Degreasing thiab tu: Tshem tawm cov roj, roj nplua nyeem, thiab cov dej paug los ntawm lub pob ntseg nrawm.
Acid pickling: Siv cov kua qaub kom tshem tawm cov av oxides thiab txhim kho cov nplaum ntawm cov plating txheej.
Tso yaug: Ua kom muaj zog huv si uas tsis muaj cov kua qaub.
(2) Cadmium Electroplating
Electrolyte: Cadmium plating feem ntau siv cadmide cadmium daws teeb meem lossis tsis yog-cyanide plating cov kev daws teeb meem.
Workpiece raws li cathode: Nyob rau hauv Hluav taws xob tam sim no, cadmium ions tau muab los ntawm kev daws teeb meem mus rau txheej nrawm, sib sau ib txheej plating plating.
(3) post-kho
Kev Kho Mob Passivation (Chromate hloov dua tshiab txheej):
Txhim kho corrosion tsis kam thiab tiv thaiv cadmium oxidation.
Cov Xim Passivation: ntshiab, daj, txiv ntseej ntsuab (qib tub rog).
Kev Kho Shoing:
Ntxiv kom txhim kho corrosion tsis kam, tshwj xeeb tshaj yog rau cov ntawv thov aerospace.
Hydrogen embrittlement nyem ci:
Tiv thaiv kev kub zog steel fasteners los ntawm fracturing vim yog hydrogen browlement.
Raug ci kub: 190 degree {- 220 degree, Duration: {}}}}}}}}}}} teev (nyob ntawm qib fastener).
4. Qhov tsis zoo ntawm Cadmium plating
Kev txhawj xeeb txog kev noj qab haus huv ib puag ncig:
Cadmium yog cov hlau toxic uas ua kom muaj kev phom sij ib puag ncig thiab muaj kev phom sij rau tib neeg (tshwj xeeb yog cov kev daws teeb meem thiab cadmium fumes).
Nruj me ntsis tswj hwm los ntawm cov kev cai ib puag ncig xws li EU rohs thiab mus txog nws maj mam hloov chaw los ntawm eco-phooj ywg hloov pauv ntawm ecoy plating, txhuas txheej txheem).
Tus nqi siab:
Cov ntaub ntawv cadmium kim, thiab cov txheej txheem plating yuav tsum tau tswj nruj nruj, ua rau nws muaj nqi tshaj zinc plating.
Kev Tswj Cov Kev Tswj:
Vim yog Cadmium cov toxicity, qee lub tebchaws thiab cov cheeb tsam tau txwv tsis pub siv Cadmium-Plated Fasteners.
5. Kev thov ntawm cadmium plating
Vim tias nws cov kev ua tau zoo tshaj, Cadmium-Plated cov nyiaj soast yog siv hauv kev lag luam hauv qab no:
Ib tug tub rog: Cov dav hlau dav hlau txheej txheem, lub tshuab hloov hluav taws xob, hluav taws xob txuas hluav taws xob, thiab lwm yam.
Cov khoom siv tub rog: Qhov tseem ceeb hauv kev tso tsheb tso tsheb hlau luam, cov tsheb muaj sia, thiab tshuab riam phom.
Marine Kev Lag Luam: Corrosion-resistant bolts rau nkoj, submarines, thiab ntug dej hiav txwv.
Kev Lag Luam Hluav Taws Xob: Fasteners lossis cov tshuaj tiv thaiv hluav taws xob yuav tsum tau ua haujlwm siab.
Nuclear Zog Khoom: Siv nyob rau hauv high-kub thiab high-radiation ib puag ncig.
6. Eco-phooj ywg xaiv rau cadmium plating
Vim ib puag ncig cov kev cai, ntau yam kev lag luam nrhiav kev xaiv rau Cadmium plating, suav nrog:
Zinc-Nickel AllOy plating (ZN-NI): Muab cov qauv corrosion tsis kam zoo ib yam li Cadmium plating, eco-tus phooj ywg, thiab nqi-zoo.
Txhuas Txheej Txheej (piv txwv li, Alumipdate®): Siv nyob rau hauv Aerospace thiab cov ntawv thov tub rog, muab cov khoom lag luam zoo heev thiab kev coj ua.
Kev sib tw noromium passivated zinc plating: Ib qho kev xaiv hauv eco-phooj ywg rau cov ntawv thov kev lag luam dav dav, txawm tias muaj kev tiv thaiv me ntsis ntau dua cadmium.
Thermal txau Txhuas Alloy: Haum rau cov tubrog nkoj thiab qhov chaw kub-ib puag ncig, nrog zoo corrosion tsis kam.
7. Xaus
Cadmium-Plated Fasteners tseem ceeb nyob rau hauv Aerospace, kev lag luam vim tias lawv cov kev ua yeeb yam zoo, kev ua tau zoo, thiab kev ua tau kub siab. Txawm li cas los xij, vim muaj kev txhawj xeeb ib puag ncig, ntau lub tebchaws yog txwv nws siv thiab txhawb nqa kev hloov hluav taws xob hauv eco-phooj ywg.
