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Recent content by tripog

  1. tripog

    Oxidation of stainless steel

    Pretty frustrating having most of the people appreciate the troubleshooting and fix only to have the young engineer argue every point and be upset that the machine functions as designed. But thank you guys for all your information, it helped me explain my point a good amount and helped me learn...
  2. tripog

    Oxidation of stainless steel

    Yesterday I ended up having to talk to their bosses and mine to kick all of their well intentioned staff off the machines as they were doing more harm than good. Today I setup the oven as a standalone oven, pointed out some facts about their current setup that needs to be fixed for any oven to...
  3. tripog

    Oxidation of stainless steel

    Can anyone verify what temperature stainless steels will oxidize in the presence of O2? I'm being told around 290C
  4. tripog

    Oxidation of stainless steel

    Helium leak test on old unit was by sniffing, I was not here for the leak check on the new oven. I'm hoping to complete one tomorrow but as of now the new oven pressure reading has been holding at 1x10-2 mbar for about an hour.
  5. tripog

    Oxidation of stainless steel

    My composite toes were made for stepping. Unfortunately when I arrived they had the oven disconnected and taken somewhat apart. Tomorrow I will be setting up for standalone operation and doing some helium leak testing on it, according to them it went down to -11 on a Pfeiffer adixen unit, the...
  6. tripog

    Oxidation of stainless steel

    It held vacuum with no change for about 6 hours, they ran the oven at that point. It's baked off during testing and they baked it off again, supposedly they performed a helium leak test with no signs of a leak but now it's claimed that a water cooling line is leaking even though the cooling...
  7. tripog

    Oxidation of stainless steel

    at this point its looking like I wont be able to troubleshoot it tuesday, it may be coming off.
  8. tripog

    Oxidation of stainless steel

    @EdStainless that would be a great article to read if youre able to track it down at somepoint.
  9. tripog

    Oxidation of stainless steel

    @3DDave the ar feed has been swapped from the box atmosphere to right from house gas, i'll have to see if a tank is avaliable although the other oven is on the same house gas and even though it too is fed from the box it is producing parts fine, well was, they did something to cause the oven to...
  10. tripog

    Oxidation of stainless steel

    I am not familiar with what they are using the ovens for, I only know that the oxidation is a problem for them. I am just trying to get a little more familiar with the chemistry and process so, I can be better prepared for troubleshooting. Though I do not believe this to be an oven issue, I...
  11. tripog

    Oxidation of stainless steel

    I will be visiting the site tuesday, hopefully will be able to run some tests then. the blue tint is from moisture? how is the blue different from the golden color?
  12. tripog

    Oxidation of stainless steel

    The batch ran last night came out with a blue tint more than anything. A helium leak test showed no signs of any leak.
  13. tripog

    Oxidation of stainless steel

    I am not the one baking these items, I asked the same question about 300c and was unable to get an answer, the ovens go from 60c up to 600c
  14. tripog

    Oxidation of stainless steel

    the purge gas is a house supply, the second unit is connected to the same gas without issue. They took it upon them selfs to clean the chamber with iso, I recommend clean dry rags as well. I have not had a chance to use the mass spec yet. Yes there is a port i can tie into I can not answer that...
  15. tripog

    Oxidation of stainless steel

    I am not part of the process about how the parts are handled prior to entering the oven, I have inquired about that, They did clean the inside of the oven with iso alcohol though. If I have to head back down to the site I will be traveling with a mass spectrometer. The readings for o2 and h2o...
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