Letter 13014

Nickel electroplating 

State different types of baths in the process of nickel electroplating?

Ahmed Ismail
Ainshams University - Cairo, EGYPT

Ed. note: Our readers don't come here for a flash card quiz, Mr. Ismail :-)
They tend to not enjoy 'abstract' questions like this one, but want 'real world' questions. Who are you, why do you want to know, what kind of parts do you want to plate, etc. etc. Thanks.

Table 3 - Nickel electroplating solutions

	Watts Nickel	Nickel **Sulfamate Typical	***Semi-Bright Bath2
Electrolyte Composition1), g/L
Nickel Sulfate, NiSO4.6H2O	225 to 400		300
Nickel Sulfamate, Ni (SO3NH2)2		300 to 450
Nickel Chloride, NiCl2.6H2O	30 to 60	0 to 30	35
Boric Acid, H3BO3	30 to 45	30 to 45	45
Operating Conditions
Temperature, deg C	44 to 66	32 to 60	54
Agitation	Air or mechanical	Air of mechanical	Air or mechanical
Cathode Current Density, A/dm2	3 to 11	0.5 to 30	3 to 10
Anodes	Nickel	Nickel	nickel
PH	2 to 4.5	3.5 to 5.0	3.5 to 4.5
Mechanical Properties
Tensile Strength, Mpa	345 to 485	415 to 610	-
Elongation, %	10 to 30	5 to 30	8 to 20
Vickers Hardness, 100 gram load	130 to 200	170 to 230	300 to 400
Internal Stress, Mpa	125 to 185 (tensile)	0 to 55 (tensile)	35 to 150 (tensile)

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