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Thread: Electrounrusting New question,old topic

  1. #21
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    Dec 2016
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    Quote Originally Posted by J Tiers View Post

    A blade that does not hold an edge.... in shat way? does it dull? Or does the edge break off and chip? If it chips off, that is evidence for embrittlement, but if it just dulls, there is more chance that it is just softer steel.
    Chips off.

  2. #22
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    Jan 2004
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    Missouri
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    Fair enough.

    Throw it in he oven and see if that helps. If so, then you have GOOD evidence.
    1601

    Keep eye on ball.
    Hashim Khan

  3. #23
    Join Date
    Jan 2006
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    There is an ASTM standard for baking after electroplating, but I'm not sure how well it applies to electro de-rusting.

    The standard requires baking at 190 degC for at least 3 hours for steels of 1200 MPa or higher.

    Low strength steels aren't really susceptible to hydrogen embrittlement.

    Ed
    For just a little more, you can do it yourself!

  4. #24
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    Jul 2014
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    A bit to the West of Portland Oregon
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    Quote Originally Posted by Glug View Post
    The problem with using electrolysis on the mystery metals you described is some of them will probably contain cadmium, chromium, nickel, and other metals. Those will end up in the solution, and I think they call that Hexavalent Chromium. That's very bad stuff, and it is verrry difficult to dispose of properly.
    Flunked chemistry, did you?

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