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S&S Swan Maintenance - Skeg extensions is delaminated
16 November 2017 - 07:15
#1
Join Date: 11 November 2017
Posts: 25

Skeg extensions is delaminated

Hi all! 

 

In ours Swan 37 skeg is extended with acid-resisting steel. The extension part is partically delaminated from skeg. How this must be repaired? 

 

JereQ

Swan 37 #12 

Skeg delamination

17 November 2017 - 13:23
#2
Join Date: 02 January 2008
Posts: 1547

Dear JereQ
Welcome to the Forum, believe you are the new owner.
 
Is there laminate on top of the stainless or vice versa? These materials do not stick well to each other, because stainless quickly forms an oxide layer on the surface in air, and this prevents the resin from attaching properly. A special procedure is recommended, described in an earlier thread. Basically wet sand the stainless surface using epoxy as wetting agent, this prevents oxide from affecting the bond. 
Kind regards
Lars

17 November 2017 - 17:23
#3
Join Date: 11 November 2017
Posts: 25

Dear JereQ
Welcome to the Forum, believe you are the new owner.
 
Is there laminate on top of the stainless or vice versa? These materials do not stick well to each other, because stainless quickly forms an oxide layer on the surface in air, and this prevents the resin from attaching properly. A special procedure is recommended, described in an earlier thread. Basically wet sand the stainless surface using epoxy as wetting agent, this prevents oxide from affecting the bond. 
Kind regards
Lars

Dear Professor, 

 

 

Thanks a lot of your answer. GRP is on the steel. If I understood correctly wet resin separates plain steel (AISI 316)  from air while sanding?

 

JereQ

Swan 37 Pohjanneito new owner
Finland

18 November 2017 - 08:58
#4
Join Date: 02 January 2008
Posts: 1547

Dear JereQ

Yes, you are right, resin or primer prevents contact with air.

Maybe not necessary to cover the stainless with laminate, would filler do the job?
Kind regards
Lars

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