Look for 18-8 or 300 series stainless steel. The 18 means 18% chromium and
the 8 means 8% nickel.
73
Matt
KM5VI
From: Raymond Benny [mailto:rayn6vr@gmail.com]
Sent: Sunday, March 03, 2019 11:07 AM
To: Matt <maflukey@gmail.com>
Cc: Tower Talk <TowerTalk@contesting.com>
Subject: Re: [TowerTalk] FW: Silver vs Aluminum vs Copper Re: OT: Inductor
Calculator
Matt,
I have not heard of chromium washers. Where do you purchase them?
Ray,
N6VR
On Sat, Mar 2, 2019, 9:03 PM Matt <maflukey@gmail.com
<mailto:maflukey@gmail.com> > wrote:
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@contesting.com
<mailto:towertalk-bounces@contesting.com> ] On Behalf Of
john@kk9a.com <mailto:john@kk9a.com>
Sent: Friday, March 01, 2019 9:05 PM
To: towertalk@contesting.com <mailto:towertalk@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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