Yuav ua li cas cam platinum ntawm titanium?

Plating txheej txheem ntawm platinum ntawm titanium substrate

Cov txheej txheem electroplating ntawm platinum ntawm titanium koom nrog cov kauj ruam hauv qab no:
Pretreatment ntawm titanium substrate → electrocleaning → kev ua kom qhuav → txhuam hluav taws xob → distilled dej yaug → tshuab kom qhuav.

 

1.Proreatment ntawm titanium substrate

 

Tam sim no, muaj ntau hom platinum plating cov ntsiab uas tuaj yeem siv rau ntau substrates. Txawm li cas los xij, platinum plating rau titanium yog qhov nyuaj vim titanium yog nquag rau passivation. Cov yeeb yaj kiab passive nyob rau saum npoo tiv thaiv kev sib raug zoo ntawm cov txheej thiab lub substrate, ua rau nws nyuaj ua kom tiav cov platinum txheej. Therefore, pretreatment is necessary to remove the passive film and form an active layer-a titanium hydride (TiH₂) film. Qhov no hydride txheej cov ntaub ntawv Qasi-Metallic Bonds nrog ob qho titanium substrate thiab platinum txheej, ua kom zoo nkauj nplaum.

 

Etching txheej txheem

 

Lub hom phiaj ntawm etching yog kom tshem tawm cov zaj duab xis passive ntawm lub titanium nto. Qhov no feem ntau ua tiav siv cov kev xav zoo nitric acid-hydrofluoric acid system ntawm chav tsev kub rau 5-10 feeb.

 

Txheej txheem ua kom tiav

 

Lub hom phiaj ntawm kev ua kom yog los tsim cov yeeb yaj kiab nquag ntawm lub titanium nto. Tom qab kev ua kom muaj zog, lub titanium deg cov ntaub ntawv ib titanium hydride (ti₂) txheej, uas zoo li grey-dub-dub-dub. Vim yog cov kev sib tshooj sib tshooj ntawm cov titanium substrate, tih₂, thiab cov platinum txheej, Quadi-Metallic BRED yog tsim, kom muaj zog adhesion. Tsuas yog tom qab kev ua kom muaj peev xwm tuaj yeem ua tau lub titanium daim ntawv yuav raus hauv cov plature daws rau platinum tso cai.

 

2. Electroplating cov txheej txheem

 

Aqueous electroplating

 

Aqueous electroplating ntawm platinum yog qhov qauv siv ntau tshaj plaws. Cov kev hloov pauv plating tuaj yeem raug faib ua cov hom acidic thiab alkaline.

Alkaline Platinum Plating cov ntsiab lus suav nrog:

 

P-ntsev plating daws (dinitrodiamine platinum raws li lub ntsiab ntsev)

Poov tshuaj hexahydroxydroxyplatinate-raws li alkaline plating daws

Acidic Platinum Plating Cov Ntsiab Lus suav nrog:

Sulfamic acid-based platinum plating daws

Dns (dinitrosulfatopate) sulfate plating

 

(1) sulfamic acid-based plating

 

Cov tshuaj no ua cov txheej ci, tuab platinum txheej nrog nplua crystallization vim yog cov nyhuv uas sulfamic sulfams, uas txhim kho cov Catholamic acids, uas txhim kho cov Cathoden polarization.

 

(2) DNs plating daws teeb meem (muaj kuab acidic)

 

Cov tshuaj no tso cai rau kev tso nyiaj qaim, tuab tuab platinum ntawm qhov kub qis dua. Txij li tsis muaj roj tso tawm thaum plating, qhov kev pheej hmoo ntawm pinholes lossis porosity yog qhov tsawg. Txawm li cas los xij, qhov ua tau tam sim no yog tsawg, thiab kev npaj ntawm dinitrosulfateginate yog ntau dua li p-ntsev.

 

Molten ntsev electroplating

 

Molten ntsev platinum plating pib thaum xyoo 1930. Hauv cov cyanide da dej da dej, lub passive zaj duab xis ntawm cov hlau refract cov me me tuaj yeem yaj, thiab txij li cov electrolye yog oxygen-dawb, txheej txheej adheres muaj zog. Qhov tshwm sim tso nyiaj yog ducile thiab kev ntxhov siab pub dawb.

Kev npaj siv Electrolyte:

Kev sib xyaw ntawm 53% NACN thiab 47% KCN yog pre-yaj nyob rau hauv ib tug ceramic crucible.

Thaum qhov ntsuas kub tshaj lub taw tes melting los ntawm 50 degree (~ 550 degree), ob platinum electrodes tau tso, thiab electrolysis pib.

Ib zaug platinum ion concentration ncav cuag ~ {0. 3%, plating tuaj yeem pib.

Kev khiav hauj lwm:

Cathodic tam sim no ceev: 30-300 A / M²

Kev ua tau zoo tam sim no: 65-98%

Kev tiv thaiv sib cav sib ceg yuav tsum muaj tshwj tsis yog thaum lub sijhawm yaj.

Cov txheej txheem no ua rau tuab, ci ntsa iab, kev nyuaj siab yog cov nyom, thiab kim, ua rau nws tsis zoo rau cov ntawv thov loj.

 

Txhuam Plating

 

Txhuam plating keeb kwm nyob rau hauv cov teb chaws Europe nyob rau hauv 1899 raws li kev kho tawm ntawm kev kho plating txoj kev. Thaum pib, ib tug paj rwb anode tau dipped nyob rau hauv plating daws teeb meem thiab rubbed hla thaj chaw uas tsis zoo kom tso nyiaj txheej txheej. Ntxov txhuam plating ntxov yog qeeb, muaj cov khoom tsis zoo, thiab tsim nyias nyias. Txawm li cas los xij, tom qab xyoo txhim kho-nrog tshwj xeeb plating pens, thiab ntau-controlled fais fab kev daws teeb meem-txhuam plating los ua ib feem dav siv hluav taws xob.

Qhov Zoo Ntawm Cov Txhuam Plating:

High Hlau ion concentration → Fig Broupition tus nqi (5-15 zaug sai dua li cov kev sib txuas).

Tsawg hydrogen embrittlement, siab hardness, tsawg porosity, tswj thickness me me → feem ntau yuav tsum tsis muaj ncej-machining.

Cov cuab yeej siv tau yooj yim, kev ua haujlwm yooj yim, rau-thaj chaw siv → zoo tshaj plaws rau kev kho cov khoom hnav lossis cov feem ntau.

Vim yog cov kev sib tw no, txhuam plating feem ntau siv rau kev kho cov ntawv thov es tsis yog kev sib dhos plating.