A490 Bolts and 90% Zinc Rich Primer.
A490 Bolts and 90% Zinc Rich Primer.
(OP)
I have a tower of exposed steelwork which is to be galvanised.
My 1.5" diameter A490 bolts obviously cannot be galvanised, so I am proposing coating these in 90% zinc rich primer after installation.
Are there any issues with this such as embrittlement?
My 1.5" diameter A490 bolts obviously cannot be galvanised, so I am proposing coating these in 90% zinc rich primer after installation.
Are there any issues with this such as embrittlement?





RE: A490 Bolts and 90% Zinc Rich Primer.
Rod
RE: A490 Bolts and 90% Zinc Rich Primer.
RE: A490 Bolts and 90% Zinc Rich Primer.
cheers,
gr2vessels
RE: A490 Bolts and 90% Zinc Rich Primer.
RE: A490 Bolts and 90% Zinc Rich Primer.
ASTM Specifications permit the galvanizing of ASTM A325 bolts but not ASTM A490 bolts. Similarly, the application of zinc to ASTM A490 bolts by metallizing or mechanical coating is not permitted because the effect of mechanical galvanizing on embrittlement and delayed cracking of ASTM A490 bolts has not been fully investigated to date.
Dik
RE: A490 Bolts and 90% Zinc Rich Primer.
RE: A490 Bolts and 90% Zinc Rich Primer.
RE: A490 Bolts and 90% Zinc Rich Primer.
that is exactly what I was after.
RE: A490 Bolts and 90% Zinc Rich Primer.
http://www.themagnigroup.com
http://www.doerkenusa.com
Regards,
Cory
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RE: A490 Bolts and 90% Zinc Rich Primer.
Hg
Eng-Tips policies: FAQ731-376: Eng-Tips.com Forum Policies
RE: A490 Bolts and 90% Zinc Rich Primer.
Rod
RE: A490 Bolts and 90% Zinc Rich Primer.
Hg
Eng-Tips policies: FAQ731-376: Eng-Tips.com Forum Policies