I. Cov teeb meem zoo sib xws ntsig txog txheej txheej plating
1. Tsis sib xws Plating lossis Localized Tsis Plating
Ua rau: Tsis sib xws tam sim no kev faib tawm, kev sib cuag tsis zoo ntawm cov plating fixture, tsis zoo sib sib zog nqus plating muaj peev xwm nyob rau hauv sib sib zog nqus recesses ntawm workpiece (nyuaj deposition nyob rau hauv qis tam sim no cheeb tsam).
Kev tshwm sim: Tsis sib xws ntawm qhov gloss, dhau -plating ntawm ntug thiab cov ces kaum, nyias plating los yog plating plating nyob rau hauv qhov tob los yog sab hauv phab ntsa.
Kev Txhim Kho Kev Ntsuas: Ua kom zoo dua qhov kev teeb tsa ntawm lub tank electroplating, siv cov anodes auxiliary, kho qhov ceev tam sim no thiab plating tov muaj pes tsawg leeg (xws li, tswj cov CrO₃: SO₄²⁻ piv rau 80-100: 1).
2. Pinholes thiab Pitting
Ua rau: Tsis txaus degreasing thaum pretreatment, residual roj los yog oxides ntawm qhov chaw, hydrogen npuas adhering thaum electroplating tsim insulating cov ntsiab lus, tiv thaiv hlau deposition.
Kev tshwm sim: me me pores txuas los ntawm txheej txheej plating mus rau lub substrate, txo cov corrosion kuj.
Kev Txhim Kho Kev Ntsuas: Txhim kho alkaline ntxuav thiab ntxuav ultrasonic; ntxiv cov tshuaj ntub dej kom txo qhov nro; tsis tu ncua lim cov tshuaj plating kom tshem tawm cov impurities tsis tu ncua.
3. Chromium txheej zoo li mottled, hazy, lossis npub.
Ua rau: Tsis txaus passivation lossis ua kom lub tsho hauv qab (piv txwv li, nickel txheej) tom qab polishing; ntau saccharin lossis chloride ion cov ntsiab lus hauv cov tshuaj plating.
Cov tsos mob: tsis sib xws ntawm qhov ci, nrog rau thaj tsam hazy lossis greyish - dawb.
Kev Txhim Kho Kev Ntsuas: Tswj cov txheej txheem nickel plating tsis ua kom txaus ua ntej chromium plating (immersion hauv 3% -5% sulfuric acid rau 2 feeb); tsis tu ncua tsom xam thiab purify lub plating tov.
4. Plating txheej tev, delamination, lossis flaking.
Ua rau: Tsis tiav degreasing thaum ua ntej kho; xeb los yog oxide zaj duab xis ntawm lub substrate nto; kev tshem tawm tsis zoo ntawm hydrogen embrittlement.
Cov tsos mob: Yooj yim tev tawm nyob rau hauv lub teeb siab, tshwj xeeb tshaj yog pom nyob rau hauv khoov los yog tej yam kev mob.
Kev Txhim Kho Kev Ntsuas: nruj me ntsis ua raws li cov txheej txheem degreasing, pickling, thiab ua kom cov txheej txheem; ua kev kho dehydrogenation ntawm 200-220℃rau 3 teev tom qab plating.
II. Teeb meem Dimensional thiab Geometric Tolerance
1. Tawm - ntawm - kam rau ua sab nraud los yog tsis zoo ncaj
Uas: Tsis raug clamping thaum lub sij hawm machining, cuab yeej hnav, tsis tsim nyog sib tsoo tsis, los yog tsis muaj kev ntxhov siab tso tawm tom qab kev kho cua sov.
Cov tsos mob: Kev nruj dhau los yog xoob thaum lub sijhawm sib dhos, cuam tshuam rau kev taw qhia qhov tseeb.
Kev Txhim Kho Kev Ntsuas: Siv lub tshuab tsis muaj qhov nruab nrab kom paub meej cov kab npoo sab nraud; siv kaw- voj tswj ntawm "sim txiav + tshuaj xyuas" thaum lub sij hawm machining; tswj kev ncaj tsawg dua los yog sib npaug ntawm 0.08mm / m thaum lub sij hawm straightening.
2. Cov txheej tuab tsis txaus
Uas: Tsis txaus electroplating lub sij hawm, tsis tshua muaj tam sim no efficiency, txawv txav plating tov kub los yog concentration.
Cov tsos mob: Tsawg hnav tsis kam thiab ua rau lub neej luv.
Kev Txhim Kho Kev Ntsuas: nruj me ntsis saib xyuas cov txheej txheem kev daws teeb meem (kub 50-55 degree, qhov ceev tam sim no 30-60 A/dm²), thiab siv X-ray thickness ntsuas rau lub sijhawm kuaj pom.
III. Cov ntaub ntawv thiab cov txheej txheem tswj cov teeb meem
1. Ntau dhau Trivalent Chromium Ions
Kev cuam tshuam: Ua rau greying thiab roughness ntawm txheej plating, thiab txo cov peev txheej sib sib zog nqus plated.
Txoj Kev Tswj: Txo Cr³⁺ concentration los ntawm loj - cheeb tsam cathodic electrolysis thiab tswj cov plating tov sib npaug.
2. Txawv teb chaws hlau impurity Contamination (xws li hlau, tooj liab ions)
Qhov chaw: Workpiece poob, anodic corrosion, kev taw qhia los ntawm cov ntaub ntawv raw khoom.
Qhov tshwm sim: Ua rau pinholes, roughness, thiab txo adhesion.
Kev kho mob: Tsis tu ncua dilute lub plating tov los yog siv ion pauv rau purification.
3. Hydrogen Embrittlement Risk
Mechanism: Muaj ntau cov hydrogen tso tawm thaum lub sij hawm electroplating, thiab hydrogen atoms nkag mus rau hauv lub substrate, txo cov khoom toughness.
Kev Tiv Thaiv Kev Tiv Thaiv: Txhua qhov siab - lub zog chromium plating rods yuav tsum tau txais kev kho mob tshem tawm hydrogen kom tiv thaiv kev tawg sai sai thaum ua haujlwm.
