Galvanic txheej. Electroplating Technology. Electroplating

Galvanic txheej yog ib tug txheej txoj kev los ntawm cov hlau nyob rau hauv ib co lwm yam txhais tau tias ntawm electrolysis. Qhov no txoj kev yog nqa tawm siv pa immersion txoj kev. Tom qab no preconditioning Circuit Court laug cam yog loaded rau hauv lub plating da dej, uas sawv cev rau lub capacitance ntawm ib tug dielectric khoom, uas yog lawm ua tus sau nrog ib tug ntsha thiab muab anodes (lawv tej zaum yuav soluble thiab insoluble) thiab ib tug ntaus ntawv rau kev tswj kub thiab nws cov tshuaj.

ua nqi

Kis ntawm DC ua rau lub fact tias cov uncovered tiv thaiv daim npog qhov ncauj thiab kev cob cog rua rau lub electrode feem ntawm lub Rooj Tswjhwm Saib yog them los ntawm ib tug txheej ntawm npib tsib xee los yog kub tej thickness. Kom muab tso rau ntawm lub anodes kom cov txheej thickness yog kwv yees li niaj hnub.

PCB kub plating yog feem ntau tau siv ib ob-kauj ruam cov txheej txheem. Ua ntej, lawv yog immersed nyob rau hauv da dej, nyob rau lub npib tsib xee yog thov los ntawm electroplating. Qhov no siv ib siab tam sim no ceev, uas lub acid tshuaj ntawm lub npib tsib xee txheej yog tso, ib tug tuab ntawm 0.05-0.1 microns. Qhov no saib kuas muaj zog adhesion ntawm npib tsib xee thiab tooj liab, uas thiaj li muaj qhov porosity ntawm lub txheej thiab kuj yuav tiv thaiv kom txhob allergic ntawm tooj liab rau hauv lub kub txheej. Tom qab ntxuav, cov khoom no feem ntau yog mus nyob rau hauv ib tug gilding da dej nyob qhov twg lub peev xwm yog ua los ntawm kub txheej rau 0.5 m los ntawm lub ntsha.

Electroplating thiab kho kom zoo nkauj

Txawm nyob rau hauv ancient lub sij hawm muaj ib tug dai kom zoo ntawm artistic hlau. Niaj hnub nimno ntau lawm qhia tias impart ib co kev thaj chaw ntawm cov hlau nto kev kho mob galvanic yuav siv. Tiv coatings ntawm lub noble co muaj peev xwm yuav tau los ntawm nag lossis daus ntawm co ntawm cov brines nyob rau hauv tus ntawm ib tug hluav taws xob tam sim no. Nrog rau cov coatings yog ua tau rau ib tug heev lub sij hawm ntev kom muaj cov xim thiab cov ci ntawm hniav nyiaj hniav kub. Lawv tsis tsuas yog tiv thaiv kom txhob darkening ntawm cov khoom, tab sis kuj muaj ib qho zoo heev polishing nyhuv. Piv txwv li, plating kub los yog nyiaj pub mus tas li khaws cia cov xim thiab cov ci ntawm hniav nyiaj hniav kub.

Muaj ntau ntau txawv variations ntawm tus txheej txheem no, txhua tus uas yuav siv ntawm ib tug hlau:

- chrome;

- tooj liab plating;

- zinc;

- npib tsib xee;

- ib tug tin-Bismuth txheej;

- tshuaj oxidation,

- tshuaj passivation;

- anodizing;

- electropolishing.

chromium-plating

Qhov no saturation diffuse chromium steel nto los yog depositing rau qhov chaw ntawm lub txheej cov ntaub ntawv uas los ntawm ib tug ntsha nyob rau hauv qhov kev txiav txim ntawm hluav taws xob tam sim no. Nyob rau hauv cov ntaub ntawv no, electroplating yog teem rau lub xeb tiv thaiv yog siv rau kho kom zoo nkauj los yog rau koj ntxiv kom cov neeg kawm ntawv ntawm qhov chaw hardness. Plating nyob rau hauv lub lag luam thiab yuav siv tau rau kho kom zoo nkauj. Nyob rau hauv cov ntaub ntawv no, lub hom phiaj tseem ceeb ntawm cov txheej txheem - imparting ib tug nws yog xim hlau nto ci zoo nkauj spectacular. Nthuav dav ua ntej daim ntawv thov ntawm chromium yuav tsum tau polished.

txheej zog

Hard chrome plating yog yus muaj los ntawm tshav kub tsis kam, lub siab coj kuj, cov neeg pluag wettability, tsis tshua muaj kev sib txhuam, thiab tsis tshua muaj plasticity. Tsis tas li ntawd, tus nto tau txais xws zog raws li stability nyob rau hauv cov nqe lus ntawm kev sib txhuam, muaj peev xwm withstand load tis, raws li zoo raws li lub disadvantages txuam nrog kev puas tsuaj yooj yim feeb meej nyob rau hauv poob siab loads. Plating chromium nyob rau hauv daim ntawv ntawm cov mis nyuj muaj ib tug tsawg degree ntawm hardness thiab hnav kuj, tsis tshua muaj porosity. Lub nto yog kev tiv thaiv los ntawm xeb thaum tswj ib qho txaus nyiam hniav tsos.

Kev siv cov chrome plating kev lag luam

Lub hom phiaj tseem ceeb rau cov uas nws yog siv nyob rau hauv kev lag luam, qhov no muab cov ntsiab lus ntawm tej khoom, xws li muaj zog durability, nce kuj mus corrosion thiab txo kev sib txhuam. Los ntawm tus txheej txheem no, tus hlau yuav muaj zog, cov roj yog tsis raug corrosion thiab yog tsis pov tseg nyob rau hauv lub marine thiab zoo tib yam dej, nitric acid. Galvanic txheej ntawm no hom yuav ua rau lub fact tias lub saum npoo tsis xws luag ua tseem ceeb xwb vim hais tias ntawm yog dab tsi yog yuav tsum tau ua ntxiv mus xyuas, txij thaum nyob rau hauv cov ntaub ntawv no tsis muaj kawm tuab si lug nyhuv.

copperplating

Siv tooj liab coatings yam nyob rau hauv cov neeg mob thaum nws yuav tsum tau ua rau kom cov hluav taws xob conductivity, raws li zoo raws li lawv siv raws li ib nrab txheej nyob rau steel khoom ua ntej nws yog tso chrome, npib tsib xee los yog lwm yam txheej. Yog li ntawd nws yog tau los muab zoo dua adhesion, thiab txhim khu lub tiv thaiv muaj peev xwm. Tooj plating yog feem ntau tsis siv raws li ib tug nyias muaj nyias ib los yog zoo nkauj. Vim tus nquag hlau muaj peev xwm sawv ntawm kev tiv thaiv tus tsim ntawm sparks, cov khoom yuav siv tau nyob rau hauv cov roj thiab cov nkev kev lag luam.

Kev siv ntawm tooj liab plating

Qhov no tus txheej txheem no siv rau txheej ntawm tooj liab rau lub steel khoom los yog ib tug steel hlau. Feem ntau, qhov no hom ntawm txheej yog siv los tiv thaiv qhov chaw ntawm steel khoom los ntawm MAAs thiab ua nyob rau tib lub sij hawm raug cov cheeb tsam uas yuav tau mus ntxiv ua los ntawm tej.

Electroplating hlau txheej nyob rau hauv cov ntaub ntawv no feem ntau siv nyob rau hauv roj thiab cov nkev kev lag luam los mus tiv thaiv lub tsim ntawm sparks, nyob rau hauv lub electric teb rau lub tom ntej deposition ntawm multilayer coatings tsim los rau cov kev tiv thaiv thiab kho kom zoo nkauj, nyob rau hauv qhuav ntawm luam Circuit Court laug cam, los txhim kho lub soldering, raws li zoo raws li ntau lwm tus neeg. Deg tau txais xim los ntawm lub teeb liab mus tsaus liab. Lub ntxoov feem ntau yog tsis caag.

galvanizing

Ib tug ntawm cov ntau txoj kev los tiv thaiv hlau cov khoom yog galvanizing. Feem ntau nws yog siv rau cov kev kho mob ntawm ib tug ntau yam ntawm alloy los yog cov pa roj carbon steel qib. Electroplating ntawm no hom yog txaus thov rau kev tiv thaiv ntawm cov khoom ua los ntawm hlau thiab fasteners. Tau nyob rau hauv ib tug ntub dej ib puag ncig, qhov chaw ntawm lub zinc ua hauj lwm pab raws li lub anode, yog li tseg oxidation cov tshuaj tiv thaiv, thiab cov niam txiv hlau thaum uas tau txais kev tiv thaiv los ntawm cov nyom ib puag ncig yam tseem ceeb.

Electroplating ntawm no hom yuav tsuas yuav siv tau tom qab cov hlau cov khoom yuav tsum tau ua nyob rau hauv ib tug tshwj xeeb txoj kev. Yuav kom ua tau li ntawd, luaj lawv los ntawm tus kab xeb, teev, kho vajtse txias roj nplua nyeem daim ntawv sau npe. Thaum tus txheej txheem ntawm galvanizing tiav, cov khoom yuav tsum tau raug mus rau meej, i.e. nws yog etched nrog ib tug tsis muaj zog tshuaj ntawm nitric acid, ua raws li los ntawm passivation. Yog li ntawd tsis tsuas tau ua rau kom cov kuj ntawm galvanized cov khoom rau qhov tsis zoo yam tseem ceeb, tab sis kuj yuav ua rau lawv ntau hniav, uas yog, ntxiv ci thiab ib tug tej yam Hawj txawm. Electroplating Technology nyob rau hauv cov ntaub ntawv no yuav cov zinc txheej thickness ntawm 6 microns rau 1.5 hli.

npib tsib xee-plating

Kev pab tiv thaiv los ntawm cov hlau cov khoom yuav tsum accomplished siv ib tug ntau yam ntawm technologies. Ib qho ntawm feem nrov thiab ntau thaum lub caij yog npib tsib xee. Tej chaw yog vim cov tshuaj thaj chaw ntawm npib tsib xee. Nws possesses ib tug high degree ntawm kuj mus corrosion nyob rau ib qho aqueous nruab nrab, thiab cov npib tsib xee oxide tiv thaiv ntxiv oxidation ntawm cov hlau. Nyob rau hauv tas li ntawd, npib tsib xee tsis zoo amenable los ntsev, kua qaub thiab alkalis, nrog rau cov kev zam ntawm nitric acid. Piv txwv li, ib tug plating thickness ntawm 0,125 hli tiv thaiv feem ntau muaj gases nrog nce Aggressiveness. Nws yog ib qho tseem ceeb thiab xws li ib tug lub sij hawm ntawd: npib tsib xee plating amenable mus yuav luag tag nrho cov co, yog li no txoj kev yuav siv tau rau ntxiv ua ntawm cov khoom.

Kev siv cov npib tsib xee yog tsim nyog rau ib tug ntau ntawm cov kev pab raws qib:

- kev tiv thaiv ntawm cov hlau cov khoom;

- siv raws li cov hniav coatings;

- pre-txoj kev txheej yuav tsum tau raug mus ntxiv ua;

- rov qab los ntawm qhov chaw thiab cov rooj sib txoos.

Cov txheej yog yus muaj los ntawm lub siab coj kuj thiab hardness thiab yog pom zoo rau qhov chaw uas khiav lag luam nyob rau hauv tej yam kev mob ntawm tsis sib haum xeeb, tshwj xeeb tshaj yog nyob rau hauv lub qhaj ntawv ntawm tej lubrication, siv rau xeb tiv thaiv, thiab kuj muab zoo uas tsis muaj kub brazing solders, tag nrho cov tshuaj nyob rau hauv ISO. Electroplated coatings tau nce brittleness, txawm li cas los yog tsis pom zoo kom tsim flaring thiab dabtsi yog khoov qhov chaw dhau npib tsib xee plating txheej txheem. Nws yog pom zoo kom mus thov rau slozhnoprofilirovannyh paub meej. Tom qab lub tshav kub kev kho mob txoj kev nyob rau hauv tej yam kev mob ntawm 400 degrees Celsius txheej yuav nyiaj pab ntau tshaj hardness.

Tin-Bismuth

Lub tin txheej yog yus muaj los ntawm kam mus rau lub kev txiav txim ntawm cov leej faj uas muaj tebchaw, nws yog pom zoo rau hauv qhov chaw uas yog nyob rau hauv kev sib cuag nrog cov roj hmab thiab yas. Ntawm nws cov zog yuav tsum tau hu ua zoo heev adhesion nrog rau lub hauv paus hlau, elasticity, muaj peev xwm dabtsi yog khoov, nqus, stamping, flare, xovxwm-haum, raws li zoo raws li zoo tuav thaum lub sij hawm pleev. Freshly tin txheej lends nws tus kheej zoo rau soldering.

tshawb pom

Plating pab cov yam ntxwv ntawm cov conductive qhov chaw, muab rau lawv superior hluav taws xob rwb thaiv tsev zog, raws li zoo raws li kev tiv thaiv tiv thaiv tej yam uas txawv tshuaj. Ntxiv mus, qhov no txoj kev tso cai rau kom muab tau zoo heev nto muaj ib tug mirrored saib, raws li zoo raws li simulating tus txha hniav laus txheej. Nws yog ib qhov nyuaj rau overstate yuav ua li cas ib qho tseem ceeb electroplating nyob rau hauv niaj hnub kev lag luam raws li txoj kev loj hlob ntawm technology tso cai los mus ua kom tus txheej txheem zoo meej.