Ob peb yam ntxwv me me ntawm electroless nickel plating yog dab tsi?

Ob peb yam ntxwv me me ntawm electroless nickel plating yog dab tsi?

Chemical nickel deposition, tseem hu ua chemical nickel plating, yog hom kev kho deg siv dav hauv kev tsim khoom niaj hnub. Cov txheej txheem ntawm chemical nickel plating yog superior rau lwm yam kev kho deg. Tam sim no cia peb hnov ​​​​ib qho kev qhia tshwj xeeb los ntawm Jiangsu chemical nickel plating manufacturers.

Cov txheej txheem tshuaj nickel deposition yog tsom rau kev txhim kho corrosion kuj thiab hnav tsis kam ntawm workpiece nto, thiab muab kev kho zoo rau cov xim hloov thiab zoo nkauj ntawm workpiece nto. Feem ntau, thaum lub workpiece los rau hauv kev sib cuag nrog huab cua ua ntej kev kho mob, nws yog feem ntau yuav hnov ​​​​mob nrog oxygen thiab dej hauv huab cua, ua rau oxidation. Piv txwv li, xeb yog qhov tshwm sim ntawm oxidation. Cov txheej txheem tshuaj nickel plating tuaj yeem cais kev sib cuag ncaj qha ntawm cov khoom ua haujlwm thiab huab cua. Cias muab tso, nws yog los nag thiab muab ib tug hlau ion nyob rau hauv ib tug khoom daim ntawv rau saum npoo ntawm peb workpiece. Qhov no tuaj yeem ua kom cov txheej tuab raws li lub sijhawm thiab qhov ceev ntawm cov hlau ions hauv cov tshuaj aqueous. Nrog xws li nickel txheej rau kev tiv thaiv, lub workpiece tuaj yeem tsis tsuas yog tiv thaiv corrosion thiab hnav, tab sis kuj nce nws lub neej kev pab cuam.

Cov txheej txheem tshuaj nickel deposition muaj cov yeeb yaj kiab tuab. Chemical nickel deposition, tseem hu ua electroless nickel deposition, yog ib hom yeeb yaj kiab tsim yam tsis tas yuav tsum muaj hluav taws xob tam sim no dhau los, uas yuav tsis ua rau cov yeeb yaj kiab tsis sib xws vim qhov tsis sib xws ntawm cov hluav taws xob tam sim no. Ntev npaum li qhov muaj pes tsawg leeg hauv cov dej-soluble plating tov yog txaus thiab ib qho kub ntxiv, lub workpiece tuaj yeem muaj cov tuab tuab, txawm tias qhov muag tsis pom, qhov hniav, qhov zawj, lossis lwm qhov tsis sib xws tuaj yeem muaj cov txiaj ntsig zoo ib yam.

Cov txheej txheem tshuaj nickel deposition tuaj yeem tso rau ntawm qhov chaw ntawm ntau yam ntaub ntawv, xws li steel qhov chaw, aluminium alloys, plastics, semiconductors, thiab lwm yam, yog li txhim kho cov khoom siv.

1. Kev tshem tawm roj: cov txheej txheem tshem tawm cov roj tuaj yeem muab faib ua cov organic hnyav roj tshem tawm thiab tshem tawm cov roj tshuaj lom neeg. Cov yam ntxwv ntawm cov kuab tshuaj organic rau kev tshem tawm cov roj yog cov roj tshem tawm ceev ceev, tsis muaj corrosive rau hlau, tab sis tsis tiav cov roj tshem tawm, yuav tsum tau siv tshuaj los yog electrochemical txoj kev rau ntxiv roj tshem tawm. Cov organic solvents xws li roj av, kerosene, benzene, ketones, qee yam chlorinated alkanes, thiab olefins. Lwm qhov zoo ntawm cov organic hnyav degreasing yog tias cov kuab tshuaj tom qab degreasing tuaj yeem rov ua dua thiab rov siv dua. Organic kuab tshuaj feem ntau yog flammable thiab yuav tsum tau siv nrog ceev faj ntxiv.

Tshuaj degreasing siv cov nyhuv saponification ntawm alkaline kev daws teeb meem thiab cov nyhuv emulsification ntawm cov active tshuaj ntawm cov roj uas tsis yog saponified kom tshem tawm ntau yam roj stains nyob rau saum npoo ntawm workpieces. Qhov ntsuas kub rau kev tshem tawm cov roj tshuaj feem ntau yog nruab nrab ntawm 60-80 degrees, thiab cov roj tshem tawm cov txiaj ntsig ntawm cov khoom ua haujlwm feem ntau pom, qhia tias qhov chaw ntawm lub workpiece tuaj yeem ntub dej los ntawm dej, uas yog ib qho cim ntawm cov roj ua tiav. tshem tawm. Cov tshuaj degreasing ib txwm muaj xws li sodium hydroxide, sodium carbonate, trisodium phosphate, dej iav, emulsifiers, thiab lwm yam. Electrochemical cov roj tshem tawm tuaj yeem muab faib ua cov roj cathodic tshem tawm thiab tshem tawm cov roj anodic. Nyob rau hauv tib lub tam sim no, cov hydrogen uas tsim los ntawm cathodic roj tshem tawm yog ob zaug ntau npaum li cov pa uas tsim los ntawm anodic roj tshem tawm. Cov npuas yog me me thiab ntom, thiab lub peev xwm emulsification yog loj, ua rau cov roj zoo tshem tawm cov nyhuv. Tab sis nws yog ib qho yooj yim ua rau hydrogen embrittlement thiab impurity nag lossis daus ntawm lub cathode ntawm lub workpiece. Txawm hais tias anodic degreasing tsis muaj cov teeb meem no, nws yuav ua rau oxidation nto thiab tawg ntawm lub workpiece. Tam sim no, feem ntau siv cov roj tshem tawm txoj kev yog qhov zoo thiab tsis zoo ncej pauv. Cov mis rau kev tshem tawm cov roj electrochemical zoo ib yam li cov tshuaj tshem tawm roj.

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