I agree Phaedrus. Leaving a knife in water for two days was the cause and something which should never be done. And I sure don't want to dump on the OP - heck, personally I'm sure I've sure done a lot worse things. And this is sure not the end of the world or even human civilization as we know it.
But this thread and its timing has opened up (at least to me) an opportunity to delve into a question of steel and corrosion damage - which I think can be of benefit to the forum. The new issue (at least as I would like to look into it) is...
To what extent can stainless steel suffer HIDDEN damage from corrosion? And too what extent can that damage result in increased future risk of catastrophic edge damage (i.e., chipping)?
Going in to talk with Brion tomorrow means picking the brains of someone who has decades of direct first hand knowledge and hands-on real world experience with precisely the issues we are not experienced with - namely, salt water corrosion failure of stainless steel.
The world Brion lives in involves what can literally result in life-or-death situations. If you're in the middle of an ocean voyage and a critical component fails, you can end up with the boat sinking underneath you. That's definitely a "not good" situation and the type of personal risk that someone in a landside kitchen probably won't ever face.
What Brion has seen and talked about is how hidden corrosion can result in catastrophic component failure - the type of failure where the component literally breaks in two, with almost no advance warning to the untrained eye. And with the prevalence in modern use of stainless steels in rigging, that's where Brion's experience might help us understand what happens in our stainless steel knives.
I'm hoping to have a dialogue with Brion on this. I think that it would be a valuable subject to follow.
However, I also realize that this is likely to be a "thread hijack" moment. So, when I come back, I'll do it in a new thread, with a title probably something like "Delving into Stainless Corrosion", or something like that. And with a subject that broad, I'm now suspecting it will take longer than a few hours or an extra day to report on. So, it might be a few days or even a few weeks before I can get back to the forum with what I find.