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From: Steve Holtzman <waterdoc_at_earthlink.net>
subject: [Paddlewise] Rusting Knives
Date: Wed, 20 Oct 1999 14:44:20 -0700
For those of you noticing that your stainless steel knives are rusting, no
metal will be completely free of rust. Some just rust less quickly than
others.

Also, if you are using it in and around salt water, it is extremely
important to rinse it in fresh water. All stainless steels are corroded by
high levels of chlorides. The levels in sea water are extremely high - on
the order of 10,000 parts per million or 1 %. This will do in your stainless
steel knife very quickly. Just rinse it and dry it and you should be ok.

Steve Holtzman

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From: Greg Hollingsworth <gregh_at_abs.net>
subject: Re: [Paddlewise] Rusting Knives
Date: Wed, 20 Oct 1999 21:43:33 -0400
How about a few suggestions on how to fix a rust covered knife?  I'm almost
certain that mine's beyond hope.

    Greg


Steve Holtzman wrote:

> For those of you noticing that your stainless steel knives are rusting, no
> metal will be completely free of rust. Some just rust less quickly than
> others.
>
> Also, if you are using it in and around salt water, it is extremely
> important to rinse it in fresh water. All stainless steels are corroded by
> high levels of chlorides. The levels in sea water are extremely high - on
> the order of 10,000 parts per million or 1 %. This will do in your stainless
> steel knife very quickly. Just rinse it and dry it and you should be ok.
>
> Steve Holtzman
>
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From: Steven Holtzman <waterdoc_at_earthlink.net>
subject: Re: [Paddlewise] Rusting Knives
Date: Wed, 20 Oct 1999 19:28:48 -0700
Greg,





I wish there was an easy fix but unfortunately there isn't. The best that I
could recommend is that you remove as much of the rust as possible. Try Naval
Jelly or just wire brushing. The problem is that if the rust was extensive,
the metal surface will be pitted. Each of these pits will set up a corrosion
reaction and continue to rust faster than the smooth stainless steel would.
The only good side, is that it will rust slower than if the rust was still
present. 





The NACE (National Association of Corrosion Engineers) has identified over
2,000 different types of corrosion. One of them is referred to as underdeposit
corrosion. That is what will occur if the rust is left in place. The high
chloride levels of the salt water will only cause intergranular stress cracks
between the grains of the metal structure.





Best bet is to prevent the rust as much as possible in the first place.





Steve


  ----- Original Message ----- 


  From: Greg Hollingsworth 


  To: Steve Holtzman 


  Cc: PaddleWise_at_lists.intelenet.net 


  Sent: Wednesday, October 20, 1999 6:43 PM


  Subject: Re: [Paddlewise] Rusting Knives








  How about a few suggestions on how to fix a rust covered knife?  I'm almost



  certain that mine's beyond hope.





      Greg








  Steve Holtzman wrote:





  > For those of you noticing that your stainless steel knives are rusting, no

  > metal will be completely free of rust. Some just rust less quickly than


  > others.


  >


  > Also, if you are using it in and around salt water, it is extremely


  > important to rinse it in fresh water. All stainless steels are corroded by

  > high levels of chlorides. The levels in sea water are extremely high - on



  > the order of 10,000 parts per million or 1 %. This will do in your
stainless


  > steel knife very quickly. Just rinse it and dry it and you should be ok.


  >


  > Steve Holtzman


  >


  >
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From: <Sidney_Stone_at_amsinc.com>
subject: Re: [Paddlewise] Rusting Knives
Date: Thu, 21 Oct 1999 07:49:38 -0400
I have not tried this but it may work or help clean a rusty knife.  Spray
it with oven cleaner.  I have used oven cleaner to clean dirty circular saw
blades.

I will check the condition of my knife this week and if it needs cleaning,
try this approach and reports back.

To reduce the possibility of my shorty "falling" out of its sheath, I use a
plastic binding one might use to hold wires together.  It is strong enough
to hold the knife if it exist the sheath by itself but weak enough to
quickly break when I pull out the knife.

sid


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From: Arthur Hebert <seacajun_at_gs.net>
subject: Re: [Paddlewise] Rusting Knives
Date: Fri, 22 Oct 1999 14:49:23 -0500
Greg wrote;

>How about a few suggestions on how to fix a rust covered knife?  I'm almost
>certain that mine's beyond hope.
>
What I do to clean my knife is ;
Scrape any thick rust off with gentle scraping using another knife.
After bulk of rust is removed I then use 000 steel wool pads. This removes
the balance of rust well, good for getting into those small pits.
Be sure to rinse your knife extremely well.  You do not want to leave small
particles of steel wool on your knife to rust.
Lube it afterwards to hinder the rust returning and it will return.
Arthur

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