On Fri, 01 May 2009 07:06:04 -0500, Brian Whatcott
wrote:

Bruce in Bangkok wrote:


I wouldn't argue that 304 is the alloy of choice for marine use but I
have rails on a 40' boat that were built from 304 and 10 after years
of use there is no corrosion on them....

Bruce in Bangkok
(bruceinbangkokatgmaildotcom)

Stainless steel does well in relatively dry environments with access to
oxygen. Look at your home cutlery, for example.
Then go buy a stainless bowl and fill it half full of water.

See how long it takes to develop its first pin hole.
A matter of weeks or less, quite likely.

Brian W


No, that is an exaggeration. In fact I have a stainless bucket - said
to have been made in India - that has been on the boat, and in general
use for some ten years. No holes yet.

Cheers,

Bruce in Bangkok
(bruceinbangkokatgmaildotcom)

Bruce in Bangkok wrote:
....
Stainless steel does well in relatively dry environments with access to
oxygen. Look at your home cutlery, for example.
Then go buy a stainless bowl and fill it half full of water.

See how long it takes to develop its first pin hole.
A matter of weeks or less, quite likely.

Brian W


No, that is an exaggeration. In fact I have a stainless bucket - said
to have been made in India - that has been on the boat, and in general
use for some ten years. No holes yet.

Cheers,

Bruce in Bangkok

If you have a stainless steel bucket, then you are in a position to do
a little experiment then. One you are convinced will be harmless even.

Half fill the bucket over the side of your boat, and leave it on deck -
half full, untouched, unstirred. What could be easier? Let us know how
long it takes for the bucket to dry out..... (one way or another! :-)
This is not such a risky proposition for a hot galvanized bucket of the
traditional design though....

Brian W

On Fri, 01 May 2009 21:12:45 -0500, Brian Whatcott
wrote:

Bruce in Bangkok wrote:
...
Stainless steel does well in relatively dry environments with access to
oxygen. Look at your home cutlery, for example.
Then go buy a stainless bowl and fill it half full of water.

See how long it takes to develop its first pin hole.
A matter of weeks or less, quite likely.

Brian W


No, that is an exaggeration. In fact I have a stainless bucket - said
to have been made in India - that has been on the boat, and in general
use for some ten years. No holes yet.

Cheers,

Bruce in Bangkok

If you have a stainless steel bucket, then you are in a position to do
a little experiment then. One you are convinced will be harmless even.

Half fill the bucket over the side of your boat, and leave it on deck -
half full, untouched, unstirred. What could be easier? Let us know how
long it takes for the bucket to dry out..... (one way or another! :-)
This is not such a risky proposition for a hot galvanized bucket of the
traditional design though....

Brian W


Won't work now. It is the beginning of the rainy season - the bucket
won't dry out for six months, or so....

We are in Bangkok at the moment and I'll fill one of the wife's
stainless cooking bowls with water and sit it in the back room and let
you know what happens...


Cheers,

Bruce in Bangkok
(bruceinbangkokatgmaildotcom)

Bruce in Bangkok wrote:
On Fri, 01 May 2009 21:12:45 -0500, Brian Whatcott
wrote:

Bruce in Bangkok wrote:
...
Stainless steel does well in relatively dry environments with access to
oxygen. Look at your home cutlery, for example.
Then go buy a stainless bowl and fill it half full of water.

See how long it takes to develop its first pin hole.
A matter of weeks or less, quite likely.

Brian W

No, that is an exaggeration. In fact I have a stainless bucket - said
to have been made in India - that has been on the boat, and in general
use for some ten years. No holes yet.

Cheers,

Bruce in Bangkok
If you have a stainless steel bucket, then you are in a position to do
a little experiment then. One you are convinced will be harmless even.

Half fill the bucket over the side of your boat, and leave it on deck -
half full, untouched, unstirred. What could be easier? Let us know how
long it takes for the bucket to dry out..... (one way or another! :-)
This is not such a risky proposition for a hot galvanized bucket of the
traditional design though....

Brian W


Won't work now. It is the beginning of the rainy season - the bucket
won't dry out for six months, or so....

We are in Bangkok at the moment and I'll fill one of the wife's
stainless cooking bowls with water and sit it in the back room and let
you know what happens...


Cheers,

Bruce in Bangkok
(bruceinbangkokatgmaildotcom)

Hehe....even paradise has its downside then? - but that bowl experiment
will be interesting!

Brian W

On Sat, 02 May 2009 09:19:45 -0500, Brian Whatcott
wrote:



Hehe....even paradise has its downside then? - but that bowl experiment
will be interesting!

I'm a bit confused here. Had SS dog water bowls sit wet for years,
without a bit of corrosion.
Are you talking salt water only?

--Vic

Vic Smith wrote:
On Sat, 02 May 2009 09:19:45 -0500, Brian Whatcott
wrote:


Hehe....even paradise has its downside then? - but that bowl experiment
will be interesting!

I'm a bit confused here. Had SS dog water bowls sit wet for years,
without a bit of corrosion.
Are you talking salt water only?

--Vic

The condition for rapid crevice corrosion of stainless steel is oxygen
depletion of a water covered surface. Stress can make it worse apparently.

Brian W

On Sat, 02 May 2009 09:19:45 -0500, Brian Whatcott
wrote:

Bruce in Bangkok wrote:
On Fri, 01 May 2009 21:12:45 -0500, Brian Whatcott
wrote:

Bruce in Bangkok wrote:
...
Stainless steel does well in relatively dry environments with access to
oxygen. Look at your home cutlery, for example.
Then go buy a stainless bowl and fill it half full of water.

See how long it takes to develop its first pin hole.
A matter of weeks or less, quite likely.

Brian W

No, that is an exaggeration. In fact I have a stainless bucket - said
to have been made in India - that has been on the boat, and in general
use for some ten years. No holes yet.

Cheers,

Bruce in Bangkok
If you have a stainless steel bucket, then you are in a position to do
a little experiment then. One you are convinced will be harmless even.

Half fill the bucket over the side of your boat, and leave it on deck -
half full, untouched, unstirred. What could be easier? Let us know how
long it takes for the bucket to dry out..... (one way or another! :-)
This is not such a risky proposition for a hot galvanized bucket of the
traditional design though....

Brian W


Won't work now. It is the beginning of the rainy season - the bucket
won't dry out for six months, or so....

We are in Bangkok at the moment and I'll fill one of the wife's
stainless cooking bowls with water and sit it in the back room and let
you know what happens...


Cheers,

Bruce in Bangkok
(bruceinbangkokatgmaildotcom)

Hehe....even paradise has its downside then? - but that bowl experiment
will be interesting!

Brian W

Well, if you want the rice to grow in paradise ("no have rice, pretty
soon die") you gotta have rain :-(

Cheers,

Bruce in Bangkok
(bruceinbangkokatgmaildotcom)

Vic Smith wrote:
On Sat, 02 May 2009 09:19:45 -0500, Brian Whatcott
wrote:


Hehe....even paradise has its downside then? - but that bowl experiment
will be interesting!

I'm a bit confused here. Had SS dog water bowls sit wet for years,
without a bit of corrosion.
Are you talking salt water only?

--Vic

I realize I didn't give you a straight answer to a straight question.
Partly because I had heard of crevice corrosion in reactor tubes with
high purity water, but the stainless bowl that I left out to test, had
salt in it. This sailor's URL is probably more relevent to sailboat
owners.

http://www.alberg30.org/maintenance/...viceCorrosion/

Brian W