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Percentage of SN in Pb for Hard Chrome Plating

adv.    

2005

Dear sir,

1) I Want to know the percentage of Tin into Lead for the anodes used for hard chrome plating.

2) Also I want to know about RMS values for the Hard chrome surface done after grinding.
Regards,

Sharda Kumar
hard chrome - New Delhi, India

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Dear ,
Mr.Sharad Kumar,
In anodes the ratio is 93% lead & 7% tin, for RMS value it depends on the operation where it is going to use, if it is for shocker Ra value will be less than .3 um.

Vishwas Nangare
motorcycle accessories mfgr.
- Aurangabad, Maharashtra, India
2005

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Anodes can be whatever you want. Tin helps in forming the oxide coating and allows the anode to last a little bit longer and to plate a tiny bit faster. 0-6% is common. Many people will add antimony to the allow to make them more rigid. If you are using conforming anodes, you will find that tin makes it more malleable and antimony adds will require forming not more than 24 hours after casting. Scrap tire balance weights are a cheap source of lead with antimony in it. Start out with about 1% of the anode weight as tire weights and go up or down from there as desired.
RMS depends on the grinding conditions. 6 is fairly easy to get. if you started out with a 16 before plate.

James Watts
- Navarre, Florida
2005

adv.