Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
posted to rec.boats.building
 
Posts: n/a
Default 43' aluminum hull repair

My friends 43'aluminum houseboat has developed some severe pitting on
the bottom. Since he bought it, it has been in a lift and will continue
to be - the pitting existed before he bought it. Some of the hull is
like new but bad pitting where there has been barnacles.

We are having it hauled and sandblasted Mon. The yard also has a
treatment which they guarentee will remove any trace of salt in the
aluminum pores. I expect we will find too much pitted area to
economically weld.

Question - how well will expoxy impregnated fiberglass mat adhere to a
well prepaired rough surface ?? Patches would be 1 to 2 ft. sq. Boat
does 8 mph max and we would be happy with a 10 year life to the
repairs. The longest the hull will be in (salt) water will be 1 week
and then back in the lift. BTW we will be painting with 3 coats of
epoxy paint after repairs.

  #2   Report Post  
posted to rec.boats.building
Steve Lusardi
 
Posts: n/a
Default 43' aluminum hull repair

There is no free lunch. Welding in new metal is faster, better and cheaper.
Problem sounds like electrolosis. Salt isn't the problem. Disimilar metals
is.
Steve

wrote in message
oups.com...
My friends 43'aluminum houseboat has developed some severe pitting on
the bottom. Since he bought it, it has been in a lift and will continue
to be - the pitting existed before he bought it. Some of the hull is
like new but bad pitting where there has been barnacles.

We are having it hauled and sandblasted Mon. The yard also has a
treatment which they guarentee will remove any trace of salt in the
aluminum pores. I expect we will find too much pitted area to
economically weld.

Question - how well will expoxy impregnated fiberglass mat adhere to a
well prepaired rough surface ?? Patches would be 1 to 2 ft. sq. Boat
does 8 mph max and we would be happy with a 10 year life to the
repairs. The longest the hull will be in (salt) water will be 1 week
and then back in the lift. BTW we will be painting with 3 coats of
epoxy paint after repairs.



  #3   Report Post  
posted to rec.boats.building
Richard J Kinch
 
Posts: n/a
Default 43' aluminum hull repair

Question - how well will expoxy impregnated fiberglass mat adhere to a
well prepaired rough surface ?


Epoxy does not adhere to oxidized aluminum, which is to say, any aluminum
exposed to air, even for seconds. So you cannot just sandblast it and
expect it to bond.

I have heard of a technique where you first apply a thin epoxy layer to the
metal, and then immediately brush with a stainless brush through this
layer, which exposes fresh elemental aluminum but protects it from the air.
This is reputed to work but I have no experience with it myself. And I
don't know how well it holds up when immersed.
  #4   Report Post  
posted to rec.boats.building
 
Posts: n/a
Default 43' aluminum hull repair

Hi.

I have been working on cars and light comm vehicles for years, during
this time I have used a product called Scorpion coatings, for truck bed
liners, having coated my own truck bed with this I can say that it is
bloody marvelous, you would find it very difficult to damage it.

Since the coating is applied direct to the surface, there is no air
gaps so therefore no corrosion.

This coating can be used for all sorts of applications, truck beds,
workshop floors, flat roofs etc.

I have used it on the floor in the deck area of my boat, but not on the
outer hull as mine is ok.

Check out the web site, you can allways ask them if it would work.

There are lots of similar companys doing the same thing. I guess they
are all basicly the same?? You can find adverts in any 4x4 mag.

Web site, http://www.scorpioncoatings.com/

Regards
Slim

  #6   Report Post  
posted to rec.boats.building
mark
 
Posts: n/a
Default 43' aluminum hull repair

http://www.armacoatings.com/marine.html


wrote in message
oups.com...
Hi.

I have been working on cars and light comm vehicles for years, during
this time I have used a product called Scorpion coatings, for truck bed
liners, having coated my own truck bed with this I can say that it is
bloody marvelous, you would find it very difficult to damage it.

Since the coating is applied direct to the surface, there is no air
gaps so therefore no corrosion.

This coating can be used for all sorts of applications, truck beds,
workshop floors, flat roofs etc.

I have used it on the floor in the deck area of my boat, but not on the
outer hull as mine is ok.

Check out the web site, you can allways ask them if it would work.

There are lots of similar companys doing the same thing. I guess they
are all basicly the same?? You can find adverts in any 4x4 mag.

Web site, http://www.scorpioncoatings.com/

Regards
Slim



  #7   Report Post  
posted to rec.boats.building
0_Qed
 
Posts: n/a
Default 43' aluminum hull repair

mark wrote:

http://www.armacoatings.com/marine.html



== http://www.sulzermetco.com/

'=hot=' , thermal 'alum' spray ...
refreshes 'alum' jet engine cast/sheet metal parts.

akin to rebuilding crankshafts ...

Ed
  #8   Report Post  
posted to rec.boats.building
Richard J Kinch
 
Posts: n/a
Default 43' aluminum hull repair

mark writes:

http://www.armacoatings.com/marine.html


Hmmm. A soft, rubbery, waterproof coating made from polyurethane that takes
7 days to set.

Sounds like 3M 5200 to me.
  #9   Report Post  
posted to rec.boats.building
mark
 
Posts: n/a
Default 43' aluminum hull repair

Do you know how to read.
Boat Hulls: Arma Coatings provides a lightweight yet extremely hard, durable
coating for aluminum, fiberglass and wooden boats. It sets quickly and
allows you to hit the water in 2-3 days. It withstands the torture of
remote, unimproved launch areas, hidden water hazards like rocks, logs and
branches, and a variety of beaching environments. Use it as a keel guard or
full bottom protection to prolong the life and beauty of your boat.



"Richard J Kinch" wrote in message
. ..
mark writes:

http://www.armacoatings.com/marine.html


Hmmm. A soft, rubbery, waterproof coating made from polyurethane that
takes
7 days to set.

Sounds like 3M 5200 to me.



  #10   Report Post  
posted to rec.boats.building
Richard J Kinch
 
Posts: n/a
Default 43' aluminum hull repair

mark writes:

Do you know how to read.


Your top-posting makes it difficult, but I was only quoting the site you
cited. Don't blame me.
Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
43' Aluminum Hull Repair [email protected] General 3 April 23rd 06 03:29 PM
Sailboat hydrolized hull repair Marco Boat Building 7 April 21st 06 12:19 PM
rec.boats.paddle sea kayaking FAQ [email protected] General 0 April 20th 06 05:35 AM
Hey Bart~The finest Aluminum hull afloat IMO Joe ASA 1 April 16th 06 04:59 AM
rec.boats.paddle sea kayaking FAQ [email protected] General 0 February 18th 06 06:27 AM


All times are GMT +1. The time now is 11:10 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 BoatBanter.com.
The comments are property of their posters.
 

About Us

"It's about Boats"

 

Copyright © 2017