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

[Matt]

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 at gmail.com] 
Sent: Sunday, March 03, 2019 11:07 AM
To: Matt <maflukey at gmail.com>
Cc: Tower Talk <TowerTalk at 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 at gmail.com <mailto:maflukey at 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 at contesting.com <mailto:towertalk-bounces at contesting.com> ] On Behalf Of
john at kk9a.com <mailto:john at kk9a.com> 
Sent: Friday, March 01, 2019 9:05 PM
To: towertalk at contesting.com <mailto: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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