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Recent content by tdomm

  1. tdomm

    Pitting / frosty pitting issue on Gold Plating for small parts

    We are getting a frosty / hazy gold plating on some 303 Stainless steel parts. (the parts look pitted upon 50X power inspection) The parts are passivated using Citric Acid prior to gold plating per ASTM A967-05 They then get a Sulfamate Nickel Strike and then a gold strike of 99.5 pure gold...
  2. tdomm

    Inclusion / crack in 17-4 stainless steel and 420 stainless steel

    https://res.cloudinary.com/engineering-com/image/upload/v1430403351/tips/Cracking-1_nq71hy.bmp I need some help We have inclusions "cracks" in .250" bar stock we are machining. The inclusion is a black substance but we can not figure out what it is and is not all the way through the...
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