Outlet/Intake Corrosive Reaction?

[A_Sails_Pace]

My hull outlets and intake strainers are currently, along with the hull itself, covered in coppercoat. I have been advised these should be sanded back, cleaned and anti-fouled. Apparently the anti-foul causes a reaction that can lead to damage? I know it's a minor thing but I can't seem to find a straight answer anywhere.

All advice welcome. Cheers.

A.S.P

 

[Rappey]

My friends boat has the copper coat right up to the skin fittings. There is a 1" visible ring around each fitting in the copper coat where they are having some sort of visible reaction.
A surveyor noted they should be isolated from each other.

 

[Tranona]

Suggest you give Coppercoat a call. Mine were masked before the Coppercoat was applied to the hull and I used spray Trilux on them

 

[vyv_cox]

Copper is anodic to brass and bronze, so if there was any galvanic action it would be the copper that was wasted. However, Coppercoat insist that copper particles are not in contact with themselves or surfaces, being separated by the epoxy.

 

[Scarron]

Copper is anodic to brass and bronze, so if there was any galvanic action it would be the copper that was wasted. However, Coppercoat insist that copper particles are not in contact with themselves or surfaces, being separated by the epoxy.

I received those same assurances from the coppercoat people and was reassured but eliminated any potential problem by using Trudesign skin fittings and just coppercoated the lot. It works very well and has lasted me so far - on my 11th year with the boat in the water pretty much all year round.

 

[A_Sails_Pace]

As always, many thanks for the advice. I can't work out if there is some sort of reaction occurring, or if it's just where the coating is separating from the joining area of the outlet.

 

[vyv_cox]

As always, many thanks for the advice. I can't work out if there is some sort of reaction occurring, or if it's just where the coating is separating from the joining area of the outlet.

It may well be that the Coppercoat is not adhering to the brass and is becoming detached. I find that an etch primer is always needed on copper alloys.

 

[A_Sails_Pace]

It may well be that the Coppercoat is not adhering to the brass and is becoming detached. I find that an etch primer is always needed on copper alloys.

I was advised of this same thing yesterday funnily enough.

Thanks mate.

A.S.P