zinc electroplating

[tinsnano]

Hi guys, i want to plate zinc on iron (functional plate). i have used zinc sulphate solution and the part to be plated and graphite rod. as a brightener i used sugar. but the result i got is not as bright as i expected.
any help please

 

[dogtop]

tinsnano,

See Lowenheim, Frederick A. "Electroplating. Fundamentals of Surface Finishing," McGraw-Hill Book Co., New York, 1978. pp.180-182. (ISBN: 0-07-038836-9)

It seems that you may be missing an additive or the pH might be too high.

HIH

dogtop

 

[tinsnano]

i am trying to have free download of the book (but i cant). but what kind of additive should i use and the pH should be what?

 

[dogtop]

Can you provide more information about the plating conditions? Such as temperature, pressure, concentrations of components, pH, plating voltage, etc.

 

[tinsnano]

pH=2
concentration 26gm ZnSO4 with 200gm water
temperature room temperature around 23C
pressure atmospheric pressure
plating voltage 20V

 

[dogtop]

see

http://www.astm.org/Standards/B633.htm

hth

 

[tinsnano]

unfortunately i live in Ethiopia, here we don't have internet payment system.any ways i really thank you