[TowerTalk] FW: Silver vs Aluminum vs Copper Re: OT: Inductor Calculator

[Matt]

When the surface area of the anode is relatively large compared to the
cathode, galvanic corrosion is generally not a problem when the stainless is
cathodic.   Hence using relatively small 18-8 stainless fasteners on
aluminum elements or galvanized structures generally presents little
interaction provided that the assembly is not in a salt laden or heavy
chloride environment.   The British Stainless Steel Association has
published some scholarly articles on this subject as well as NACE.

I regularly use high chromium stainless washers to isolate copper from
aluminum or zinc galvanize without issue.  A generous application of no-ox
compound provides added protection and if using stainless threaded
fasteners, anti-seize compound is a must.

73
Matt
KM5VI







-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
john at kk9a.com
Sent: Friday, March 01, 2019 9:05 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Silver vs Aluminum vs Copper Re: OT: Inductor
Calculator

Very true but I believe that most antenna manufactures use these materials
together.

John KK9A


Bert Balmemo VE3NR wrote:

Stainless steel and aluminum don't go well together - galvanic corrosion! 

Bert VE3NR

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