DeeGee
Well-Known Member
Can someone give me a link(s) to get a better insight into CC and it's prevention. /forums/images/graemlins/smile.gif
Crevice Corrosion
- Thread starter DeeGee
- Start date
Lakesailor
Well-Known Member
Is this any good?
Talbot
Well-Known Member
I had some crevice corrosion on an underwater stainless fitting. Stopped completely after I attached an anode to it. Anode now wears away happily and gets replaced as necessary.
DeeGee
Well-Known Member
I suppose ask a silly question deserves a silly answer. I had searched as CC, but also CC detection, CC prevention... and nothing of any direct usefulness, hence my posing the question here. I know that there was some discussion some time ago, which I rather carelessly ignored.
So, I have already found the erudite references to the definition of CC, and how to construct things which do not CC. But my problem is that someone else did the making of my rigging, and I can't remake it.
Can I be more specific:
<ul type="square"> [*]as a yottie, is there anything I can do to avoid or ameliorate the effects of CC? [*]did I read somewhere of CC being detectable by the effect on the conductivity of the parts, esp. rigging parts? [*]Any other useful info? [/list]
So, I have already found the erudite references to the definition of CC, and how to construct things which do not CC. But my problem is that someone else did the making of my rigging, and I can't remake it.
Can I be more specific:
<ul type="square"> [*]as a yottie, is there anything I can do to avoid or ameliorate the effects of CC? [*]did I read somewhere of CC being detectable by the effect on the conductivity of the parts, esp. rigging parts? [*]Any other useful info? [/list]
boatmike
Well-Known Member
The subject is complex. What you are possibly calling crevice corrosion may simply be electrolytic corrosion. CC can usually be prevented by promoting a circulation of water (and therefore oxygen) Often seen on propshafts etc where bearing surfaces prevent good water circulation CC is usually specific to these situations where open parts corrode due to the potential difference between dissimilar metals or components of alloys within the metal itself. Simple EC can be prevented by fitting anodes near to the part and electrically connected to it or preferably on the part itself. Usually the situation seen is a combination of both.
DeeGee
Well-Known Member
[ QUOTE ]
The subject is complex. What you are possibly calling crevice corrosion may simply be electrolytic corrosion...
[/ QUOTE ]
No, I am concerned with crevice corrosion - the hidden killer of those lovely stainless fittings above deck! Due to the deliberate construction intended to keep water out, air is kept out, but the slightest of salt water ingress occurs and CC follows (a search on CC will reveal many high-falutin' explanations but basically a little cauldron of acid gets created). This can occur in such vital places as the end-fittings or terminations of wire rigging, internal to wire rigging, and places where s/s screws hold things together.
My problem is that I do not know how prevalent this is, and how it can be detected.
The subject is complex. What you are possibly calling crevice corrosion may simply be electrolytic corrosion...
[/ QUOTE ]
No, I am concerned with crevice corrosion - the hidden killer of those lovely stainless fittings above deck! Due to the deliberate construction intended to keep water out, air is kept out, but the slightest of salt water ingress occurs and CC follows (a search on CC will reveal many high-falutin' explanations but basically a little cauldron of acid gets created). This can occur in such vital places as the end-fittings or terminations of wire rigging, internal to wire rigging, and places where s/s screws hold things together.
My problem is that I do not know how prevalent this is, and how it can be detected.