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finish reactivity

Discussion in 'The Kitchen Knife' started by MotoMike, Jan 13, 2016.

  1. MotoMike

    MotoMike Founding Member

    I have seen some knives that seem to rust instantly upon contact with any acidic food. Some stainless seem impervious to this and could lay there in perpetuity without changing. But what steels are mildly reactive so that a patina will develop, but not so fast as to require constant rinsing and wiping?
     
  2. ofc like you say in the title - degree of finish matters.

    In my (limited) experience O1, blue and 52100 are pretty forgiving and "slower" to react. While the lower alloyed carbon steels are fast, like 1095 and white steel.
    There would also be the "semi-stainless" steels, but I haven't tried them for myself so I can't say anything on that.
     
  3. John Fout

    John Fout Founding Member

    52100 in my experience was really slow. The super blue core on my Hiromotos is also slow. The white steel of my deba is slow
     
  4. V2 on Wakui is average I would say. It doesn't r requires immediate cleaning and is pretty low reactive once the patina appears.

    It's usually the carbon/iron cladding that adds problems. Take Zakuri knives as example.
     
  5. BathonUk

    BathonUk Founding Member

    I agree with MotoMike. O1 is slow and also it's very good steel for kitchen knives IMO.
     
  6. I'm with Anton on this, the cladding seems to be way more reactive than any of the white or blue core steel that I have.
     
  7. CrisAnderson27

    CrisAnderson27 Professional Craftsman

    Anton can probably attest to this....W2 is wicked fast to color, but once colored it stabilizes almost immediately. I haven't been able to make mine rust here in my house...meaning with basic care (wiping when you change foods you're cutting, cleaning up after you're finished cutting, etc) it's been really pleasant in use.

    That said, I polish my knives to 5k grit then add loose abrasives to the polishing pad on top of it...which I'm sure has a lot to do with the lack of rust as well...but even my EDC knives which are little better than belt finish don't have much issue, and patina beautifully when used to cut food.
     
  8. Oops, I forgot to mention W2. Probably because in my eyes W2 from Chris and knives from 52100 that I've seen are all pretty much semi-stainless. I mean I haven't seen rust on them. Probably most problematic steel that I've encountered so far is white#1 (used on two Japanese chisels). It manages to develop rust even during sharpening.
     
  9. MattS

    MattS Founding Member

    Like Cris said W2 colors very fast, but I have never had one rust. Very stable patina imo. 52100 and O1 seem similar as far as reactivity for me, but varying levels of polish may affect that.

    Isn't V2 semi stainless?
     
  10. MotoMike

    MotoMike Founding Member

    This is good stuff guys.
     
  11. Spaz

    Spaz Founding Member

    I've never had rust problems with any core steel but have had iron cladding that would rust if you looked at it wrong.
     
  12. CrisAnderson27

    CrisAnderson27 Professional Craftsman

    You mean like this?

    20160105_091034.jpg

    That happened while cutting tomatoes lol. Literally...WHILE cutting tomatoes. Like, two of them lol.
     
  13. kentos

    kentos Founding Member

    looks yummy!!
     
  14. CrisAnderson27

    CrisAnderson27 Professional Craftsman

    Fresh pico de gallo lol. Tomatoes, jalepenos, onions, cilantro, lime, and garlic. Whenever I get a knife I've never used in for a rehandle I'll make up a batch to see how it handles highly acidic foods both for edge retention and of course to test the geometry. After that it all goes filed in my mental library of how each brand performs ;).
     
  15. kentos

    kentos Founding Member

    Gonna try that tomorrow.
     
  16. CrisAnderson27

    CrisAnderson27 Professional Craftsman

    Be sure to season to taste. I like simple salt and pepper, but I've also made it with McCormick Montreal Steak Seasoning for a twist...and...well...freakin yum! There's no real ratio either...other than probably 'more tomatoes' than any single other ingredient, lol.

    Oh, and don't forget the corn chips :D.
     
  17. CrisAnderson27

    CrisAnderson27 Professional Craftsman

    Oh...and...sorry for the derail lol. Although it seems like maybe at least one person benefited!

    ;)
     
  18. Mrmnms

    Mrmnms Founding Member Gold Contributor

  19. CrisAnderson27

    CrisAnderson27 Professional Craftsman

    :D
     
  20. marc4pt0

    marc4pt0 Founding Member

    Add smoked sea salt to your Pico. Just a tiny bit, to taste.

    Iron cladding and I have never really gotten along so well, in general. I've had 2 Shigs and sold them both for this reason.
    The cladding on a Kato can be handled though. Each time I got a new one I would make caramelized onion soup, which consisted of slicing 10 to 15 pounds of onions. This blued up the cladding very nicely, and helped kickstart a very attractive, controllable patina.
    But for the Shigs, I just couldn't get the same results.
     

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