03-22-2010, 04:44 PM,
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Gordon
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RE: Galvanic corrosion
Hi Guna
to the Surface Engineering Forum.
I tend to agree with djewell.
Matching closely as possible coating with substrate, will certainly minimise potential for galvanic corrosion. But, there are differences between coating and substrate physically and chemically (I am assuming your coating is thermally sprayed). The copper coating will probably contain copper oxides. While copper may be resistant to the solution, copper oxides may not.
I would be inclined to test both sealed and unsealed coatings and see which performs best for your application.
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03-23-2010, 01:49 AM,
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Guna
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RE: Galvanic corrosion
(03-22-2010, 04:44 PM)Gordon Wrote: Hi Guna
to the Surface Engineering Forum.
I tend to agree with djewell.
Matching closely as possible coating with substrate, will certainly minimise potential for galvanic corrosion. But, there are differences between coating and substrate physically and chemically (I am assuming your coating is thermally sprayed). The copper coating will probably contain copper oxides. While copper may be resistant to the solution, copper oxides may not.
I would be inclined to test both sealed and unsealed coatings and see which performs best for your application.
Dear All,
Thank you for the advises especially by Gordon which explained the differance between coating and substrate.
S.Guna
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03-29-2010, 07:59 AM,
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vittorio
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RE: Galvanic corrosion
(03-22-2010, 01:55 AM)Guna Wrote: Hello everyone!
I'm Guna, new to this forum. I need clarification regard to need for a selaer for rebuilt copper part with same material. The part will be immersed in a solution and used as cathode. Since the materials are of same kind I think it is not necessary for a sealer. Am I correct?
Thank you
Guna
Hi
i don't understand why there should be galvanic corrosion; if i 've understood well the is just one metal, copper.
Also to assess likelihood of galvanic corrosion other factors like the type of electrolyte and area ratio of the two metal should be considered.
(links dead)
regards
Vitt
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04-19-2010, 05:36 AM,
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Russell123
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RE: Galvanic corrosion
hi all friends all members give nice information and espically godon information is very informatics.
Thanks
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