Cov nyhuv ntawm ntau yam Cheebtsam nyob rau hauv lub Nickel Plating tov rau hluav taws xob cua sov raj
Tso lus
Cov nyhuv ntawm ntau yam Cheebtsam nyob rau hauv lub Nickel Plating tov rau hluav taws xob cua sov raj
Buffer - Boric acid yog siv los ua ib qho tsis tuaj yeem tswj hwm tus nqi pH ntawm cov tshuaj nickel plating nyob rau hauv ib qho chaw. Kev xyaum tau pom tias thaum pH tus nqi ntawm cov tshuaj nickel plating tsawg dhau, nws yuav ua rau txo qis hauv cathode tam sim no efficiency; Thaum tus nqi pH siab dhau lawm, vim yog nag lossis daus tsis tu ncua ntawm H2, pH tus nqi ntawm cov kua txheej nyob ze ntawm lub cathode nto sai sai, ua rau cov tiam Ni (OH) 2 colloid. Kev suav nrog Ni (OH) 2 hauv txheej
Cov nyhuv ntawm ntau yam Cheebtsam nyob rau hauv lub Nickel Plating tov rau hluav taws xob cua sov raj
nce lub brittleness ntawm txheej. Nyob rau tib lub sijhawm, qhov adsorption ntawm Ni (OH) 2 colloid ntawm lub electrode nto kuj ua rau kom cov npuas dej ntawm cov electrode, uas ua rau muaj kev nce hauv porosity ntawm txheej. Boric acid tsis tsuas yog muaj cov nyhuv pH buffering, tab sis kuj tuaj yeem txhim kho cathodic polarization, yog li txhim kho kev ua haujlwm ntawm cov tshuaj plating thiab txo qhov tshwm sim ntawm "hlawv" ntawm qhov ceev tam sim no. Lub xub ntiag ntawm boric acid kuj muaj txiaj ntsig zoo rau kev txhim kho cov khoom siv ntawm cov txheej txheem.
Anode Activator - Tsuas yog siv cov anodes insoluble hauv sulfate hom npib tsib xee plating daws, tag nrho lwm hom nickel plating txheej txheem siv soluble anodes. Cov npib tsib xee anode yog nquag mus rau passivation thaum lub sij hawm electrification txheej txheem. Txhawm rau kom ntseeg tau qhov kev sib cais ntawm cov anode, ib qho nyiaj ntawm anode activator yog ntxiv rau cov tshuaj plating. Los ntawm kev sim, nws tau pom tias CI chloride ion yog nickel anode activator. Nyob rau hauv nickel plating tov uas muaj npib tsib xee chloride, npib tsib xee chloride tsis tsuas yog ua lub ntsiab ntsev thiab conductive ntsev, tab sis kuj ua raws li ib tug anode activator. Hauv electroplating nickel daws uas tsis muaj nickel chloride lossis muaj cov ntsiab lus qis dua, qee qhov sodium chloride yuav tsum tau ntxiv raws li qhov xwm txheej tiag tiag. Nickel bromide los yog npib tsib xee chloride kuj tau siv los ua tus neeg saib xyuas kev ntxhov siab los tswj cov kev ntxhov siab sab hauv ntawm txheej thiab muab cov txheej txheej ib qho ci ci.
Additives - Lub ntsiab tseem ceeb ntawm additives yog cov tshuaj tiv thaiv kev ntxhov siab. Qhov sib ntxiv ntawm cov tshuaj tiv thaiv kev ntxhov siab txhim kho cathodic polarization ntawm cov tshuaj plating thiab txo cov kev ntxhov siab sab hauv ntawm txheej. Raws li qhov concentration ntawm cov tshuaj tiv thaiv kev ntxhov siab hloov pauv, qhov kev ntxhov siab sab hauv ntawm txheej tuaj yeem hloov pauv los ntawm tensile kev ntxhov siab mus rau kev ntxhov siab. Feem ntau siv additives muaj xws li naphthalene sulfonic acid, p-toluenesulfonamide, saccharin, thiab lwm yam. Piv nrog npib tsib xee coatings tsis muaj kev ntxhov siab relieving agents, ntxiv kev ntxhov siab relieving agents rau lub plating tov yuav ua rau ib tug uniform, zoo, thiab semi kaj txheej. Feem ntau, cov tshuaj tiv thaiv kev ntxhov siab tau ntxiv rau hauv amperes ib teev (tam sim no feem ntau siv cov khoom sib xyaw tshwj xeeb suav nrog cov tshuaj tiv thaiv pinhole, thiab lwm yam).
Wetting tus neeg saib xyuas - Thaum lub sij hawm electroplating txheej txheem, nag lossis daus ntawm hydrogen roj ntawm lub cathode yog inevitable. Cov nag lossis daus ntawm hydrogen roj tsis tsuas yog txo cov cathode tam sim no efficiency, tab sis kuj ua rau pinholes nyob rau hauv lub txheej vim yog khaws cia ntawm hydrogen npuas ntawm lub electrode nto. Lub porosity ntawm cov nickel plating txheej yog qhov siab. Txhawm rau txo lossis tiv thaiv kev tsim cov pinholes, ib qho me me ntawm tus neeg sawv cev ntub dej yuav tsum tau ntxiv rau cov tshuaj plating, xws li sodium dodecyl sulfate, sodium diethylhexyl sulfate, sodium n-octyl sulfate, thiab lwm yam. Nws yog ib qho anionic surfactant uas tuaj yeem ua tau adsorb ntawm lub cathode nto, txo qhov kev sib tshuam ntawm cov electrode thiab kev daws teeb meem, thiab txo qis kev sib cuag lub kaum sab xis ntawm hydrogen npuas ntawm electrode, Qhov no ua rau nws yooj yim rau npuas kom tawm ntawm electrode nto, tiv thaiv los yog txo cov tiam ntawm pinholes hauv. cov txheej.
