Knife Sharpness Degrading In Storage?

I recently went to check and compare the sharpness of some of my knifes I have put in a plastic tub a few montha ago to store them. Most were hair-whittling sharp then. Now, not so much. Most of the blades were folders and stainless so this had me puzzled. I did read about this on Spyderco's Forum: [www.spyderco.com] and BladeForums:
[www.bladeforums.com]

Were both carbon steel and stainless steel edges dull over time if not used. Does anyone have or know of a wasy to prove this?

The sharpness is restored with a few passes on a Spyderco UF rod or leather strop.

"I am still discussing issues of steels and performance at this stage." -- Cliff Stamp, May his memory be a blessing
"Life is GOOD", -- Stefan_Wolf, May His Memory Be A Blessing
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Edited 1 time(s). Last edit at 01/02/2018 03:59PM by jasonstone20.

I did checks on this years ago, two things are easily explained :

-deformed apexes will relax
-corrosion happens, even on stainless steels

Cliff,
Thank you. I figured those had to be the two issues, and it was mentioned in the two threads, but it is nice to have your guesses supported by people who have done the work.

"I am still discussing issues of steels and performance at this stage." -- Cliff Stamp, May his memory be a blessing
"Life is GOOD", -- Stefan_Wolf, May His Memory Be A Blessing
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I’ve observed this myself and thought corrosion was to blame.

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[www.youtube.com]

This dulling during storage makes the way Cliff Stamp keeps his knives in storage a real good idea. I believe he has mentioned that he stores them in a state were they are not apexed, but with a few passes per side can be sharp in a few seconds. This also allows you to choose an appropriate grit finish for the task at hand.

"I am still discussing issues of steels and performance at this stage." -- Cliff Stamp, May his memory be a blessing
"Life is GOOD", -- Stefan_Wolf, May His Memory Be A Blessing
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A pretty in-depth set of experiments on this topic:
[www.youtube.com]
[www.youtube.com]

"I am still discussing issues of steels and performance at this stage." -- Cliff Stamp, May his memory be a blessing
"Life is GOOD", -- Stefan_Wolf, May His Memory Be A Blessing
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The video got deleted.

There is a guy from knifegrinders that measured the loss on stainless steels as the edge reformed the chromium oxide layer. He did it using the Bess sharpness tester.

me2,
That was the video I posted, the knifegrinders guy.

"I am still discussing issues of steels and performance at this stage." -- Cliff Stamp, May his memory be a blessing
"Life is GOOD", -- Stefan_Wolf, May His Memory Be A Blessing
WordPress YouTube Facebook Patreon Locals Instagram Twitter

[www.youtube.com]
[www.youtube.com]

"I am still discussing issues of steels and performance at this stage." -- Cliff Stamp, May his memory be a blessing
"Life is GOOD", -- Stefan_Wolf, May His Memory Be A Blessing
WordPress YouTube Facebook Patreon Locals Instagram Twitter