Zinc Vs.Aluminum
Zinc Vs.Aluminum
(OP)
I am designing a Grounding spool that is a Three part assembly. The spool center and and flanges are made out of aluminum, the flanges are bolted to the center spool by four bolts. If the bolts were Zinc plated would this cause corrosion problems between the screws and the outer flange?





RE: Zinc Vs.Aluminum
RE: Zinc Vs.Aluminum
In your condition apparently Aluminum are larger than zinc-plated area there so applying same coat to both side will help.
RE: Zinc Vs.Aluminum
"Under atmospheric conditions of moderate to mild
humidity, contact between a galvanized surface
and aluminum or stainless steel is unlikely to cause
substantial incremental corrosion"
this is taken from this doc:
Hot-dip Galvanizing for Corrosion Protection
http://www
you can find also in the same document a table with Additional corrosion of zinc and galvanized steel resulting from contact with other metals.
hope this help
S
Corrosion Prevention & Corrosion Control
RE: Zinc Vs.Aluminum
I know in Aerospace/Defense we'd often use zinc plated steel in contact with Aluminum in lieu of stainless.
KENAT,
Have you reminded yourself of FAQ731-376: Eng-Tips.com Forum Policies recently, or taken a look at posting policies: http://eng-tips.com/market.cfm?
RE: Zinc Vs.Aluminum
I'M SORRY FOR MY MISTAKE
An
RE: Zinc Vs.Aluminum
RE: Zinc Vs.Aluminum
so every case is different, there are general rules but the final decision is based on many different factors.
S.
Corrosion Prevention & Corrosion Control
RE: Zinc Vs.Aluminum
Jim Treglio
RE: Zinc Vs.Aluminum