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More zinc plating
#1395403 Tue Feb 02 2021 02:26 AM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Started working on some of the larger pieces today and am pretty happy with the results. This is the hood hinge support that I dipped partway into the electrolyte as an experiment. I still have just a 1 gallon bucket, but do have a 3 gallon on standby to be able to immerse the larger stuff completely. We'll see how that works.

The photo shows the support after 2 dips, one deeper than the other by about 2". There's no evidence of a visible mark at the shallower dip (toward the right), so that means I can do things part at a time if needed.

Attached Files
IMG_3673.JPG (293.93 KB, 428 downloads)

Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: More zinc plating
klhansen #1395442 Tue Feb 02 2021 05:24 AM
Joined: Aug 2001
Posts: 1,235
G
'Bolter
Do you have a link to your zinc plating process? That looks pretty good.

Re: More zinc plating
klhansen #1395446 Tue Feb 02 2021 06:19 AM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Here's what I used. Link [southsandia.com]
He blasted his parts prior to plating, but I just derusted them with Evaporust and wire brushing. I tried plating the springs for the hood supports and window regulators, but apparently without blasting the surface to roughen it up I couldn't get the zinc to stick that well to them.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: More zinc plating
klhansen #1395450 Tue Feb 02 2021 12:56 PM
Joined: Aug 2005
Posts: 9,293
'Bolter
Interesting. Thanks for sharing.


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Re: More zinc plating
klhansen #1395457 Tue Feb 02 2021 02:11 PM
Joined: Feb 2019
Posts: 1,968
P
AD Addict
I agree, very interesting. Keep us posted on your progress!


Phil

1952 Chevrolet 3100
Project Journals
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Re: More zinc plating
klhansen #1395460 Tue Feb 02 2021 02:47 PM
Joined: Mar 2019
Posts: 1,274
G
'Bolter
Very neat process. Thanks

Re: More zinc plating
klhansen #1395524 Tue Feb 02 2021 10:12 PM
Joined: Mar 2010
Posts: 9,702
5
'Bolter
Not to start slinging monkey wrenches, but weren't those parts cadmium plated originally?

Re: More zinc plating
klhansen #1395529 Tue Feb 02 2021 10:34 PM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
:dodging monkey wrenches: wink
They might be Carl, but zinc works for corrosion protection also. Cadmium plating probably needs nasty chemicals, and cadmium is toxic as well. I'm not going to mess with that. Nuts and bolts are zinc plated, even the ones you buy today. I think these will last my lifetime.

Finished up that hood support today. Here's some more pics. There are a few shadows, but I expect them to disappear as the zinc weathers a bit. There are also a few spots where the zinc flaked off when scrubbing after the first dip, especially on the arm opposite the mounting bracket. The second coating pretty much fixed that. I think it was because of the smoothness of the metal. So a light blast might help avoid that.

on edit: that's a tiny aquarium pump in the bucket to keep the electrolyte stirred up.

Attached Files
IMG_3674.JPG (213.08 KB, 334 downloads)
IMG_3675.JPG (413.57 KB, 338 downloads)
IMG_3676.JPG (338.64 KB, 329 downloads)
Last edited by klhansen; Tue Feb 02 2021 10:38 PM.

Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: More zinc plating
klhansen #1395532 Tue Feb 02 2021 10:50 PM
Joined: Feb 2016
Posts: 100
D
'Bolter
Kevin, I too want to thank you for sharing this.


-David

1953 2-Ton GMC
Re: More zinc plating
klhansen #1395545 Wed Feb 03 2021 12:14 AM
Joined: May 2015
Posts: 4,020
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Carl, I did a little experiment, dipping the original bracket in muriatic (hydrochloric) acid. It took the plating off very quickly.
According to this video [science.wonderhowto.com], zinc reacts quickly with the acid, while cadmium is not nearly as reactive. So based on that, these brackets were originally zinc plated.

So the monkey wrenches are successfully dodged. grin


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
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