Join Date: Oct 2010
Thanked 53 Times in 51 Posts
Rep Power: 7
Re: Chain Plate Replacement
Over weekend starting pulling my chain plates.
The lower forward shroud chain plate always has some rust staining on the deck so wanted to take a look.
Here are pics what I found. Seems to be a stress corrosion crack at the rusty area. The crack occurs where the chain plate has a sligth bend for alingment to the wire (shop made bend). This chain plate is about 6 years old and has about 30,000 miles on it.
One of the attached pics has another chain plate next to the existing (this was taken after I polished the existing plate some to clean it up). This old chain plate with no wire attached was on the boat when I bought her (in storage). You can see some corrosion, and there is a small crack running width of the chain plate. There is an indentation near the crack- indent was made when bend was done by shop, probaly while on the break machine. Seems both crevice corrosion and stress corriosion happened on the old chain plate that was stored on the boat. All the corrosion is occuring in the deck penetration area (where water could collect).
almost certain the chain plates are 316 ss.
Plan to replace all my chain plates.
Last edited by casey1999; 03-04-2013 at 02:16 PM.