Question on painting & galvanic corrosion

PleasureCruiser

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Hi,

I've read on the forum that some people have re-painted their outdrives with Hammerite and I am considering doing this with mine depending on the answers here.

Once the repainting is done using the Hammerite Special metals primer for Aluminium, is there any concern that galvanic corrision could occur or be hastened due to any of the ingredients within the paint?

Is there any difference between the 'Hammered' & 'Smooth' versions with respect to ingredients in the paint itself. It's just that I've noticed people's concern with using Copper Oxide in anti-fouls and don't know whether hammerite contains any copper or similar materials.

Thank you for your recommendations.
 

tico

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I was warned off using 'hammered finish' hammerite on my props by Steel Developments following the demise of 2 props from corrosion. The reason given was that the paint contains metal flakes that set up a galvanic cell thus accelerating corrosion.

Don't know about the 'smooth' finish tho.

I use a 2 pack epoxy on the props and that works really well.
 

PleasureCruiser

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Thanks Tico,

I was reading from an earlier post from Elessar as follows:

"" Re: Mercruiser sterndrive painting question [Re: jacksparrow11]

#1839248 - 27/04/2008 22:17

Hammerite smooth works fine but you must use hammerite special metals primer first on any bare metal. It's an etch primer and necessary for painting aluminium. ""

So perhaps only the Hammerite smooth can be used?

Also wonder if anyone has used the Hammered version and is now concerned or do the anodes provide the necessary protection?

Thanks again.
 
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