properties of en layers            to the main page

electroless nickel is in most cases a Ni-P-alloy

contrary to electrolytic layers everywhere even layer thickness

by the phosphorus incorporation very good corrosion prevention properties

achievement of high hardnesses, 500 to 1200 HV

outstanding characteristic values to friction and wear protection

good solderability

salient barrier layer function - electronics

most materials are depositly, after appropriate pretreatment

application in net, drum and rack operation

      

                         electrolyte and layer characteristics                

 

 fast deposition slowly deposition
Ni (g/l) 5,8 or 6,0 5,0 or 6,0 or 7,0
pH adjustment NH 3  carbonate  hydroxide NH 3  carbonate  hydroxide
pH range 4,5 - 5,5 4,8 - 5,3
T (°C) 85 - 93 85 - 93
µm/h 20 + / - 3 10 +-2
mto > 7 > 10              new
phosphorus content % 5 - 9 10 - 13
magnetic characteristics magnetically not magnetically
solderability well to 10µm well > 10µm means
hardness (0.1 HV) deposition status 600 + / - 50 500 + / - 50
elongation at rupture % 0,1 - 0,5 1,5 - 2,0
compression stress (mto) < 3 < 10               new
corrosion resistance well very well
optics brightly or half bright brightly half bright
make up 1 solution 1 solution

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