Crevice corrosion on paint

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Joined: Sat Oct 26, 2019 8:41 pm
Name: Andrey
Vessel: Pro V 200

Crevice corrosion on paint

Unread post by Andrey »

Hello I currently have a 2011 Pro V and have been noticing bubbles in my paint around the windshield gaskets, washdown pump switch, fuel cap, trailer tie down u bolts, around the snap buttons. and in certain spots without any bolts or openings next to it. Is there any way to prevent this from happening? I wash down thoroughly after each use. Anyone know what the root cause is? I believe it's called crevice corrosion but could also be galvanic corrosion from the stainless steel hardware.

I'm looking into upgrading to a new Ocean Pro 22HT but I am afraid of this happening to the paint again. I've read several other users on different social media sites mention they have the same exact issue with their Hewescraft, even on boats just a year or two old. Is there an issue with the factory paint or does something need to be done?

Just wanted to know if anyone else has or had this issue and what they did to remedy it.

Thank you!

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Re: Crevice corrosion on paint

Unread post by SilverFox »

Only solution is to remove, treat, and repaint where it exists. FWIW, have none at all on our 2009 ProV but it has also never seen salt.
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Re: Crevice corrosion on paint

Unread post by klamathcoho »

Saltwater + painted aluminum = crevice corrosion. It is inevitable. It is worse in areas where the paint is perforated for screws or other fasteners, and an insulator (like TefGel) wasn't used on the fastener. A good weeknight/winter project is to buy a $20 tube of Tefgel and remove every stainless fastener, treat the hole, and re-install.

As Silverfox said, the solution is to strip the paint in that area, clean the aluminum well and neutralize any acid pockets, prime with an aluminum etching primer, then re-paint. I have some pockets started on my boat (the most annoying around the pop-rivets used on the glove box lid).

It is why the pure saltwater oriented boat builders skip the paint on their aluminum boats.
2016 Hewes Ocean Pro 220, Honda 225/9.9

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Re: Crevice corrosion on paint

Unread post by RFT »

Was this a problem with the old Zolatone paint? Seems I've read many posts since they changed (many years ago) about bubbling paint.
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