SailNet Community - Reply to Topic

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Strange corrosion
 Not a Member? 


Thread: Strange corrosion Reply to Thread
Title:
  

By choosing to post the reply below you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Topic Review (Newest First)
12-27-2011 11:20 AM
RichH These hull mounted 'eyeball type' navigation lights were deemed 'inefficient for visibility and safety' by the worlds marine community ... in about ~1967(?). And by universal agreement (ABYC, SOLAS, ABCDEFG, etc. etc.) none were installed on recreational, etc. boats after that time.
12-26-2011 01:14 AM
L124C
Quote:
Originally Posted by celenoglu View Post
This type of corrosion is not rare. But the metal is not fit for marine use.
Ain't that the truth!
The lights can be seen from 12:00 if you are far enough.
I wonder how, since the hull and light fixture itself seem to be in the way. In any case, it's the close boats I'm worried about!
12-25-2011 09:47 PM
RichH The corrosion is zinc oxide which is 'extracting' from a poured casting of *pot metal* or *white metal* an inexpensive and dubious alloy of mostly zinc and varying % of tin, aluminum, magnesium, lead, etc. In the foundry trade this was also called *monkey metal*. This is a very weak alloy which quickly corrodes in the presence of water, especially seawater even if plated with nickel or chrome.
12-25-2011 09:21 PM
TQA The tops of my 70s Barients self tailors look like that.
12-25-2011 07:46 PM
Maine Sail
Quote:
Originally Posted by L124C View Post
I'm looking at a Islander 30 fixer. Both flush mount bow nav light housings show heavy corrosion that I've never seen on anything that hasn't been submerged. The boat needs work, but I don't see any other signs that it was sunk. This is the only metal on the boat that looks like this. Thoughts?

Completely unrelated, but, it just occurred to me....shouldn't another boat be able to see both lights when directly off the bow ( at 12 o'clock)? Seems to me that since the lights are recessed in the hull, another vessel couldn't see either! How does that work?
Most likely older Perko chrome plated zinc alloy... One of the dumbest ideas to ever hit boating...
12-25-2011 05:18 PM
celenoglu This type of corrosion is not rare. But the metal is not fit for marine use.

The lights can be seen from 12:00 if you are far enough.
12-25-2011 04:53 PM
L124C
Strange corrosion

I'm looking at a Islander 30 fixer. Both flush mount bow nav light housings show heavy corrosion that I've never seen on anything that hasn't been submerged. The boat needs work, but I don't see any other signs that it was sunk. This is the only metal on the boat that looks like this. Thoughts?

Completely unrelated, but, it just occurred to me....shouldn't another boat be able to see both lights when directly off the bow ( at 12 o'clock)? Seems to me that since the lights are recessed in the hull, another vessel couldn't see either! How does that work?

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


All times are GMT -4. The time now is 06:06 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.