Tus nqi pH ntawm electroless nickel plating ntawm lub tshuab nqus tsev electroplating hluav taws xob cua sov raj yog qhov tseem ceeb.

Tus nqi pH ntawm electroless nickel plating ntawm lub tshuab nqus tsev electroplating hluav taws xob cua sov raj yog qhov tseem ceeb.

 

Lub deposition tus nqi ntawm electroless nickel plating yog cuam tshuam los ntawm kub, pH, da dej muaj pes tsawg leeg thiab additives. Feem ntau, raws li qhov kub thiab txias, qhov deposition tus nqi kuj nce. Txhua lub sij hawm qhov kub nce los ntawm 0 degree, qhov ceev nce li ntawm 2 zaug.

 

Tus nqi pH yog qhov tseem ceeb, uas muaj kev cuam tshuam zoo rau cov tshuaj tiv thaiv tus nqi, kev siv tus nqi ntawm tus neeg txo qis, thiab cov khoom ntawm cov txheej txheem. Electroless nickel plating da dej yog tsim los ntawm hlau ntsev, txo tus neeg sawv cev, pH tsis, stabilizer lossis complexing tus neeg saib xyuas. Nickel ntsev feem ntau yog sulfates, nrog rau chlorides lossis acetates. Cov tshuaj txo qis feem ntau yog phosphites, borohydrides, thiab lwm yam. Cov pH tsis thiab cov neeg ua haujlwm complexing feem ntau yog ammonia lossis ammonium chloride.

Daim ntawv thov kev lag luam ntawm electroless npib tsib xee plating ntawm lub tshuab nqus tsev electroplating hluav taws xob cua sov raj feem ntau yog nyob ntawm nws ob peb yam tseem ceeb:

 

1. Lub peev xwm ntawm cov txheej plating thiab sib sib zog nqus plating (uas yog, nto plating ntawm ntau cov duab geometric, tshwj xeeb tshaj yog qhov sib sib zog nqus-qhov thiab qhov muag tsis pom qhov workpieces, feem ntau yog rau lawv cov yam ntxwv pervasive);

 

2. Kev ua haujlwm zoo los tiv thaiv corrosion (uas yog, cov yam ntxwv ntawm lub xeev amorphous ntawm cov tshuaj txheej txheej, tshwj xeeb tshaj yog cov txheej txheej ntawm cov khoom siv roj av, cov khoom siv marine, ntug dej hiav txwv, thiab lwm yam);

 

3. Zoo solderability (tshwj xeeb tshaj yog rau plating ntawm workpieces soldered nyob rau saum npoo ntawm txheej);

 

4. High hardness thiab siab hnav tsis kam (tsuas yog rau saum npoo ntawm qhov chaw pib, qhov chaw maus taus, ntau yam ncej, lub tes tsho steel, thiab pwm);

 

5. Electromagnetic shielding kev ua tau zoo (tsuas yog txheej txheej ntawm cov khoom siv hluav taws xob xws li lub computer hard disks, aircraft connectors, thiab lwm yam);

 

6. Kev kho kom haum rau cov yam ntxwv ntawm cov hlau substrates feem ntau (tsuas yog rau cov txheej txheej tshwj xeeb xws li txhuas thiab txhuas alloys, ferrite, NdFeB, tungsten, nickel thiab cobalt);

Kev kho workpiece tom qab electroless nickel-phosphorus alloy plating ntawm lub tshuab nqus tsev electroplating hluav taws xob cua sov raj

 

a. Tom qab lub plating tiav lawm, nws yuav tsum tau muab ntxuav nrog ib tug ntau ntawm tu, los yog ncaj qha mus rau hauv lub tank dej los ntxuav. Qhov ceev yog ceev thiab kev tu yog tsim nyog.

 

b. Tom qab ntxuav, lub workpiece yuav tsum tau kho raws li nram no raws li qhov teeb meem:

 

1. Muab tso rau hauv lub tank sealing rau qhov pore sealing kev kho mob, thiab muab nws tawm rau kev quab yuam cua qhuav tom qab lub sijhawm.

 

2. Tom qab ziab, tshuaj tsuag ib txheej ntawm cov roj tiv thaiv xeb rau sab nraud ntawm txheej

 

3. Yog hais tias lub workpiece tsis rov qab mus rau lub Hoobkas tam sim ntawd tom qab kev kho mob, nws yuav tsum tau khaws cia qhuav thiab kaw, thiab yuav tsum tsis txhob muab tso rau hauv ib qho chaw ntub dej, raug tshav ntuj thiab los nag, thiaj li tsis cuam tshuam rau lub neej ntawm cov khoom. txheej.

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