plating, anodizing, & finishing Q&As since 1989
Electro galvanizing for 'spangly' muscle car parts
August 14, 2012
Q. Hello, I am in the muscle car & parts restoration on Chrysler products. Cars built from 65 to 74. Many highly desirable parts have the electrogalvanizing process with the so called spangled or sort of leafy finish. I do zinc plating achieving a more satin finish. These parts had not the highly glossy finish most plating companies do. What type of zinc plating caused the spangled finish & how may I achieve it?
If I would be able to produce this highly desirable finish, it would increase my business tremendously. If it means anything, most parts were of different thickness stamped sheet metal.
Muscle car & parts restorer - Pompton Plains, New Jersey
A. Hi Bill.
Without pictures you'll probably only get responses from car enthusiasts familiar with those models. Please try to get us a photo of the finish, and maybe a car that has it.
If by spangled and leafy you mean mottled in the fashion of a frosty window in the winter, I believe you can only achieve that by hot dip galvanizing, because it's a crystallization pattern from cooling.
Courtesy of alibaba.com
If you just mean bright and shiny, bright acid zinc plating will do it.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey