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Need procedure to plate antique pewter part




Hello people,

I'm in the custom chrome plating business and I've got an old antique art deco cocktail mixer that I need to replate. The bulk of the piece is just a straight forward chrome strip, buff, reactivate the nickel and copper strike, etc. Worked fine except for the handle. Copper peeled and blistered. Our polisher thinks the base metal is pewter. I reactivated in 50% HCl with reverse current. I suspect this is where I went wrong. I will strip back down, but if anyone has any advice on how to proceed, I would appreciate it. It is a family heirloom and I would feel terrible screwing it up.

Thank You in advance

Trent Kaufman
Trent Kaufman
electroplater - Galva, Illinois
2006



Hello, Trent. I'd bet that the handle is leaded and requires HF to activate.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2006



Thanks Ted,
Any idea what the hydrofluoric acid concentration should be, and I'm assuming that no current is required? I don't like to have any more HF around than I absolutely need. Nasty stuff.

Thanks,

Trent Kaufman
Trent Kaufman
electroplater - Galva, Illinois
2006



Calcium Gluconate
for HF acid burns


on eBay or

Amazon

(affil links)

I don't have hands-on experience in that, but the Electroplating Engineering Handbook [on AbeBooks or eBay or Amazon] suggests pumice [on eBay or Amazon] cleaning, followed by cathodic cleaning, followed by dip in 20% HF. Make sure you have calcium gluconate chemical burn cream.

on hand first, just in case.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2006



2006

My experience with pewter is :
Strip to base metal, polish to desired finish (bright), cyanide copper about 10 min. acid copper for an hour. bright nickel plate for 30 min. chrome flash for 1 min.

This seems to work for me quite well. Good luck.

Frank DeGuire
- St. Louis, Missouri, USA



2006

Nope, not HF. For activation of lead alloys, use fluoboric acid, 10-15%, room temp, 30 seconds. Works better and much safer than HF. HCl is exactly wrong as it will form an insoluble film of lead chloride, and peeling is guaranteed.

jeffrey holmes
Jeffrey Holmes, CEF
Spartanburg, South Carolina




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