Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 22-10-2011, 21:07   #1
Registered User
 
Shanaly's Avatar

Join Date: Oct 2010
Location: Perth west australia, Indian Ocean
Boat: Samson C-Falcon 41'9" composite ketch (designed by Cece Norris)
Posts: 226
Aluminum Corrosion Galvanic Action on Morse Control ?

hello sailors

i have a used morse control set. it has an ally housing and stainless inner parts. the under deck half is as new as it has never got wet. the upper half is fugly, with deep pitting and white powder corrosion. i assume this is galvanic action. it the lever control is ss that could be the catalyst, as opposed to the working parts. how to cure?

- run an earth wire to the boats earth?
- grind and epoxy paint?

- ano?

many many thanks
Capn John
__________________

__________________
Shanaly is offline   Reply With Quote
Old 23-10-2011, 02:06   #2
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,114
Re: aluminium corrosion galvanic action on morse control ?

Some of the older Morse units had the head cast out of pot metal. Nothing as sophicated as galvanic corrosion on those, just plain old oxidation of cheap alloy and flaking chrome plate.
Grind the corrosion off and paint it.
__________________

__________________
so many projects--so little time !!
Blue Stocking is offline   Reply With Quote
Old 23-10-2011, 02:52   #3
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Re: aluminium corrosion galvanic action on morse control ?

I had the same problem with mine.

I looked at replacing them but couldn't find the classic look I like, and given how cheap some stuff is here, I decided to take them to a local foundry, had them filled then copied in bronze and plated.

I had some old bronze fittings/hardware I gave them for the material ...the round ends I had turned from SS.

You may be surprised how inexpensive this type of work can be depending on your location.
Attached Thumbnails
Click image for larger version

Name:	canting helm.jpg
Views:	95
Size:	163.2 KB
ID:	32852  
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 23-10-2011, 03:13   #4
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,114
Re: aluminium corrosion galvanic action on morse control ?

Quote:
Originally Posted by James S View Post
I had the same problem with mine.

I looked at replacing them but couldn't find the classic look I like, and given how cheap some stuff is here, I decided to take them to a local foundry, had them filled then copied in bronze and plated.

I had some old bronze fittings/hardware I gave them for the material ...the round ends I had turned from SS.

You may be surprised how inexpensive this type of work can be depending on your location.
NICE!! As usual James, you set the bar pretty high

BTW, hows the barge thing coming?
__________________
so many projects--so little time !!
Blue Stocking is offline   Reply With Quote
Old 23-10-2011, 05:17   #5
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Re: aluminium corrosion galvanic action on morse control ?

Thanks Blue...You know I always enjoy a good challenge.
Do you mean the dhow....or the barge/ floating island thread thing....I'd sure love to build her Ferro Cement Hulls ?
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 23-10-2011, 06:33   #6
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,114
Re: aluminium corrosion galvanic action on morse control ?

Quote:
Originally Posted by James S View Post
Thanks Blue...You know I always enjoy a good challenge.
Do you mean the dhow....or the barge/ floating island thread thing....I'd sure love to build her Ferro Cement Hulls ?
No hi-jack intended.
Curious about the dhow-related construction project.
__________________
so many projects--so little time !!
Blue Stocking is offline   Reply With Quote
Old 23-10-2011, 06:54   #7
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Re: aluminium corrosion galvanic action on morse control ?

The dhow did a good job moving most of the material out to the island, but the project is at a standstill due to political unrest...the boats safe for now in the port of Mocha.
We still have a big tower assembly and some tech equipment to transport, but had been storing it (and others) in the yard of our cotton gin in Zanzibar when alQaida took over the place...hope all the bits and pieces are still there when the finally get run out....whenever that will be is anyone's guess...

In the mean time I'm in Lebanon where my kids can continue their schooling...good news is this is where my other boats at!
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 23-10-2011, 11:33   #8
Eternal Member
 
imagine2frolic's Avatar

Join Date: Feb 2008
Location: Las Brisas Panama AGAIN!
Boat: Simpson, Catamaran, 46ft. IMAGINE
Posts: 4,508
Images: 123
Re: aluminium corrosion galvanic action on morse control ?

Quote:
Originally Posted by Blue Stocking View Post
NICE!! As usual James, you set the bar pretty high

BTW, hows the barge thing coming?
Sometimes I think his labors are beyond reach, and artistic too......i2f
__________________
SAILING is not always a slick magazine cover!
BORROWED..No single one of is as smart as all of us!
http://sailingwithcancer.blogspot.com/
imagine2frolic is offline   Reply With Quote
Old 23-10-2011, 12:00   #9
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Re: aluminium corrosion galvanic action on morse control ?

Thanks imagine2frolic...Its all about idle hands...
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 23-10-2011, 19:16   #10
Registered User
 
Shanaly's Avatar

Join Date: Oct 2010
Location: Perth west australia, Indian Ocean
Boat: Samson C-Falcon 41'9" composite ketch (designed by Cece Norris)
Posts: 226
Re: aluminium corrosion galvanic action on morse control ?

great comments peeps, I have ground and epoxied - and in th process found a small non oem bronze screw......!!!!!!!!! which i removed. its 'all white' now!

I have noted also the comments on foundry work/costs. i shall save my rigging plating for later...

ps James I was also impressed with your island - definitely a 'goer'. some modular elements could make it more transportable....

thnx again
__________________

__________________
Shanaly is offline   Reply With Quote
Reply

Tags
corrosion

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Galvanic Corrosion rabend Electrical: Batteries, Generators & Solar 1 11-10-2011 22:28
Galvanic Corrosion of Chain Galvanizing wsmurdoch Anchoring & Mooring 0 22-08-2011 12:17
Galvanic Corrosion by Fasteners Target9000 Construction, Maintenance & Refit 6 15-08-2011 11:04
Galvanic Corrosion in the US Navy CarlF Powered Boats 7 05-07-2011 15:59



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.