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  • markx's Avatar
    09-30-2019, 07:33 AM
    markx replied to a thread Aluminium thread problems! in General
    The joy of thread cutting on aluminium :D I remember the worst kind of woe was pure Al that we used for fabricating test cells to develop...
    24 replies | 1657 view(s)
  • markx's Avatar
    09-19-2019, 03:48 AM
    Manganese is a rather minor component of "regular" welding fumes, but one can not rule out its effect completely. As already mentioned there is a...
    8 replies | 582 view(s)
  • markx's Avatar
    07-30-2019, 06:00 PM
    The parts cleaner mixture may contain surfactants that promote the formation of stubborn emulsions with water upon agitation.....so I would let it...
    36 replies | 2869 view(s)
  • markx's Avatar
    07-23-2019, 04:09 AM
    markx replied to a thread Electrically Removing Rust in General
    There is no need to choose a tool that does not fit the job :) If bare steel surface is required and etching in phosphoric or other corrosive media...
    70 replies | 77334 view(s)
  • markx's Avatar
    07-23-2019, 03:53 AM
    Yes, that was my original idea also and back in the days I used to do it this way round. And I actually had a suitable rpm controlled tool to hold...
    14 replies | 3549 view(s)
  • markx's Avatar
    07-22-2019, 07:18 PM
    Yea....quartz glass can be a treacherous beast! :D The problem with machining an internal support is the fact that the tubes are.....well how to say...
    14 replies | 3549 view(s)
  • markx's Avatar
    07-22-2019, 12:17 PM
    markx replied to a thread Electrically Removing Rust in General
    It could be that under cathodic conditions part of surface rust, which mostly is the red/brown iron (III) oxide Fe2O3, is reduced to iron (II)...
    70 replies | 77334 view(s)
  • markx's Avatar
    07-22-2019, 11:58 AM
    Lord knows I tried :D ! But it would not part off as such and I was afraid to break it completely by forcing, so i kept grinding very slowly to...
    14 replies | 3549 view(s)
  • markx's Avatar
    07-22-2019, 11:32 AM
    markx replied to a thread Electrically Removing Rust in General
    Magnetite is a very fair guess....it is dense and tends to be immensely unreactive towards chemical manipulations, also it forms a very strong...
    70 replies | 77334 view(s)
  • markx's Avatar
    07-22-2019, 09:28 AM
    markx replied to a thread Electrically Removing Rust in General
    I'm quite sure it is the bulk of the oxide mass that remains unaffected by the electrochemical action. Iron oxides are rather unconductive, so the...
    70 replies | 77334 view(s)
  • markx's Avatar
    07-22-2019, 09:13 AM
    Further the support rings were machined from 304 stainless sheet and PTFE gaskets to accommodate the sight glass section. The sight glass was...
    14 replies | 3549 view(s)
  • markx's Avatar
    07-22-2019, 09:06 AM
    Have an interesting project at hand: a reflux column head for a brewhouse pilot production still. 304 stainless with a quartz sight glass section...
    14 replies | 3549 view(s)
  • markx's Avatar
    07-22-2019, 08:53 AM
    markx added 12 photo(s) to album Tap making
  • markx's Avatar
    07-22-2019, 06:42 AM
    markx replied to a thread Electrically Removing Rust in General
    The electrolytic rust removal is a a sidereaction of the main process that goes on in the sodium carbonate solution cell: electrolysis of water On...
    70 replies | 77334 view(s)
  • markx's Avatar
    07-22-2019, 06:02 AM
    A dog that "likes" cats might do the trick :D But if you already are going to inlay magnets into the window frames, then what's keeping you from...
    21 replies | 2403 view(s)
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About markx

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