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Anyone else have rusting issues with Benchmade H20?

Discussion in 'Knives and Cutting Tools' started by Malpaso, Dec 5, 2017.

  1. Malpaso

    Malpaso Solo Diver

    # of Dives: 200 - 499
    Location: MA/CT
    674
    200
    43
    A group of us (non-divers) had an opportunity to get similar engravings done on a group buy of Benchmade knives. I figured I get a dive knife, so I'd have both a working blade as well as the memento.

    After the first dive with it, upon getting home and cleaning all of my gear (an hour after the dive), I noticed some rust on the rope cutting hook. It appeared to be surface rust, so while I was disappointed, it wasn't the end of the world. After the second dive though, right out of the water, I noticed more rust, this time coming out of the handle.

    I sent it in to Benchmade to have them look at it. Long story short, they told me it was my fault for storing it in the sheath without cleaning it, even though I told them the full narrative both on the warranty sheet I sent in, as well as on the phone with a support tech. They returned it after "sharpening inspection and cleaning". You can still see the rust near the handle.

    Now I'm stuck with a knife I can't trust. I've never had this issue with my Spyderco Salt.
     
  2. rsingler

    rsingler Scuba Instructor, Tinkerer in Brass ScubaBoard Sponsor

    # of Dives: 500 - 999
    Location: Napa, California
    2,617
    2,882
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    Yep! Mine rusts too! I've sharpened it several times over the past few years.

    I don't think it's a trust thing - it's pretty rugged with or without the rust.
    But it's not very pretty any place there's bare metal. Poor alloy choice, I'd say.
     
    Malpaso likes this.
  3. lucca brassi

    lucca brassi Photographer

    # of Dives: I'm a Fish!
    Location: Kocevje , Slovenia , Europe
    1,222
    110
    63
    cook them in citric acid ( standard ASTM A967 citric acid passivation treatments )

    4-10% citric acid 71°C @ 4min , 60°@10 min or 49°@ 20min

    full article
    Article: Passivation of stainless steels
     
  4. ELCAM

    ELCAM Angel Fish

    # of Dives: 100 - 199
    Location: Maryland
    62
    18
    8
    Where do you find 4-10% premixed citric acid?
     
  5. tbone1004

    tbone1004 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    15,388
    6,692
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    mix it yourself, you can buy citric acid powder on amazon or at most health food type places
     
  6. Malpaso

    Malpaso Solo Diver

    # of Dives: 200 - 499
    Location: MA/CT
    674
    200
    43
    All well and good, but why doesn't Benchmade do this if they're selling a dive knife?
     
  7. mdb

    mdb ScubaBoard Sponsor ScubaBoard Sponsor

    5,739
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    I think rslinger had the correct answer a few posts back:

    :"Poor alloy choice, I'd say."
     
  8. Malpaso

    Malpaso Solo Diver

    # of Dives: 200 - 499
    Location: MA/CT
    674
    200
    43
    Agreed, my question was mostly rhetorical :wink:
     
    mdb likes this.
  9. lucca brassi

    lucca brassi Photographer

    # of Dives: I'm a Fish!
    Location: Kocevje , Slovenia , Europe
    1,222
    110
    63
    Even the best material RUST without knowledge and proper finishing .

    If I have knife I could sent it to quick test to XRF analyser

    PS: citric acid you can get in normal food store as preservative ( for jam)
     

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