Lithium Corrosion (Axil Axil)

The following post has been submitted by Axil Axil

High temperature lithium corrosion seems to be presenting a major problem in material engineering of the LENR ceramic tube reactor. Using a metal tube is problematical because lithium dissolves metals through a voracious alloying process and ceramics are short lived because lithium readily combines with oxygen, nitrogen, and carbon until a saturation point is reached. When a lot of lithium is needed that saturation point might not occur until after the ceramic tube has failed.

I would bet that Rossi is trying to find a lithium resistant material for the tube of his new the E-Cat-X reactor. Very high operating temperatures that the E-Cat X is running at makes lithium vapor corrosion intense.

One solution to this very difficult high temperature corrosion problem might be to uses a ceramic that contains lithium that has already reached the saturation level. “LITHIUM DISILICATE GLASS” might be resistant to lithium corrosion. A test of this material that is an alternative ceramic material used in dental crowns might be worth testing for high temperature lithium corrosion resistance.

http://sgiglass.com/ is a supplyer and fabrocator of this material. Such a fabricator might be tasked to produce a tube made from this material.

This solution might be out of the price range of the typical replicator.

Another idea is to use this glass as a surface coating just a few nanometers thick on both the inside and outside of a refractory metal tube using vapor disposition. Because we would be using a minimum of bulk material this method would not cost too much to do if the replicator can do it himself. The expansion of the coating would need to match the expansion coefficient of the refractory metal that is being used(tungsten?).

Axil Axil

  • Axil Axil

    @Ecco

    You said:

    “What if Lithium, as a penetrating corrosive agent (especially in the case of Nickel), is accelerating the embrittlement/corrosion process so that eventually, yet at a quicker rate than normal, the right nanoscale structures can appear on the metal?”

    This is a good observation. This fits in with the fuel preprocessing that Rossi has done as seen in the Lugano test. The 100 micron nickel particle that the preprocess method produces is covered with lithium throughout its entire surface area. During preprocessing, the application of lithium at high temperatures might erode the surface of the nickel particle(S) to form nanocavities as happens in palladium at high hydrogen loading levels. Maybe the crack idea of Ed Storms holds merit.

    Parkhomov uses a low quality powder with lots of carbon on the surface. Lithium processing might erode that carbon and leave nano cavities on the surface of the nickel powder as occurs in palladium at high hydrogen loading. Maybe the Russian nickel powder is good because it is so poor in production. A powder with abundant carbon content might be the best type of powder to use.

    Furthermore, the surface of the nickel powder becomes saturated with lithium to the point where lithium is no longer consumed in nickel alloying. When the reaction begins with LAH, lithium is no longer consumed and remains free and available for the LENR reaction to use.

    Another thing that could be happening in the high carbon surface preprocessing of Russian nickel powder is that lithium carbide is formed on the surface of the powder. These lithium compound might produce both lithium and hydrogen Rydberg matter during the reaction stage through a desorption process.

  • Leonard Weinstein

    LITHIUM DISILICATE GLASS has too low a melting point to use.

  • Obvious

    I suggested these months ago. They are non-wetting and resistant to molten lithium alloys by design, and off-the-shelf. They are expensive, but not excessively so.

    http://www.omega.com/pptst/PTRSSeries.html

  • Axil Axil

    http://phys.org/news/2015-10-candle-soot-power-lithium-batteries.html#nRlv

    New research shows candle soot can power the lithium batteries in electric cars

    The soot from candles will repel just about any liquid. It will be used in lithium car batteries to protect the anode from lithium corrosion.

    It might be worth an experiment fo see if candle soot can protect and preserve lithium from combining with the materials used inside the LENR reactor.

  • HS61AF91

    how about a not yet actual electromagnetic force field to contain the process? Or some kind of a sound/light frequency enclosure? Bummer that metal dissolving aspect.

  • Ted-X

    GRAPHITE (as a lining or the main tube) could possibly do the trick. In the hydrogen atmosphere, it will be quite resistant to corrosion by metallic lithium.

    • Axil Axil

      I read that carbon is corroded by lithium.

      http://www.sciencedirect.com/science/article/pii/S0008622313009998

      Quote:

      ” Microstructural analysis of the samples revealed the poor corrosion resistance of high density and low density graphite and severe attack was observed at several places on the surface. On the other hand, glassy carbon and pyrolytic graphite were relatively inert, while pyrolytic graphite showed the best corrosion resistance”

      pyrolytic graphite is deposited using high temperature disposition of a hydrocarbon gas on a substrate.

      http://www.dtic.mil/dtic/tr/fulltext/u2/607829.pdf

      • Skip

        Did you just say “light a fossil fuel based flame and coat the inside of the tube with smoke”?

        • Axil Axil

          Coat your substrate with carbon from a flame of a candle?

          • builditnow

            Axil Axil and Skip. Nice train of thought. I know someone who was involved in a startup that was doing vacuum deposition via a sputtering technique. I could check in to see if he has any contacts. They were depositing a metal in this case. There is a chance we could find some help in this area locally (silly con valley), also close to the glow stick experiments.
            On the other hand, the GS4 glowstick has been very hydrogen tight, is this an indication that there was insufficient lithium to corrode the tube?

            Also, it seems that such lithium corrosion would deprive the reactor of lithium, so, this could be an important factor to solve.
            Would there be no lithium left in the fuel after a test run?
            We should be able to test if some lithium is missing from the fuel ash.

  • Wishful Thinking Energy

    Axil, LITHIUM DISILICATE GLASS is sounding very close to me to DILITHIUM CRYSTALS! That is the LENR material we have been searching for.
    Just kidding Axil, I always appreciate your thoughtful posts and suggestions and will look into this as a possible material to incorporate in my reactors.

  • Gerard McEk

    I believe the replication group will try to use pure iron foil to avoid lithium attacking the Al2O3 reactor tube. The latter is still needed to keep the H2 inside. Not many materials are H2 tight. Surface coating seems to me a proper solution too. Replicaters could also consider evaporating a pure iron wire inside the tube under vacuum or filled with an inert gas (e.g.argon).