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EPO2 question

Discussion in 'Tribolube' started by couv, Feb 28, 2010.

  1. couv

    couv Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: 13th floor of the Ivory Tower


    In the above post you mention that this product will stop corrosion. I am wondering is applying it to a part that has already began (begun?) to corrode would halt the process. For instance, a part internal to a regulator or inflator like a chrome plated brass poppet (seat carrier) or inflator stem. Parts like these are subjected to salt water, then air, then half assed rinsed and left to dry.

    How effective would EPO2 be in an application like that? Is there a permanent coating applied?

    Thank you,


    TRIBOLUBE71 Dive Equipment Manufacturer

    # of Dives: 200 - 499
    Location: Columbus Ohio
    Protection from corrosion


    Thank you for the question. We always prefer that you start with a clean dry part that is intended for treatment. This will always give you the best results. Treating a corrosion issue in your equipment by just covering it up is not optimal, especially with PPE or life sustaining devices.Now that we have said that, I believe it would be very effective, as a temporary measure until it could be properly maintainenced. The example I would use here; fix a flat will get you where you need to go, but the real solution is a new tire.

    Attached is a photo showing how well a part can be protected from corrosion. "This is a manual gas injection manifold from the Titan rebreather. It is made of aluminum with plated brass valves. One of the valves has been removed for inspection. This might not seem important, but this valve was properly treated withTribolube® EPO2 (ONE TIME) just shy of two years ago. There used to be so much galvanic corrosion; the engineer said it took a wrench and a torsion bar to remove the valve. When Tribolube® EPO2 was properly applied to the valve (even without any grease), the part unscrewed without incident according to the engineer once loosened he unscrewed it “with just one finger”.

    *We still recommend using Tribolube® 71 lubricant after treating the part with Tribolube® EPO2.

    The coating is difficult to remove as it will resist fuel sources, oxidizers, acids, and most solvents, but to be cautious there should be a reapplication preformed as a preventative maintenance for good measure.

    EPO2 treatment of mainfold block.jpg

    Last edited: Mar 20, 2010
  3. Bubbletrubble

    Bubbletrubble Regular of the Pub

    # of Dives: 200 - 499
    Location: Seussville
    @TRIBOLUBE71: To clarify, the EPO2 should be sprayed liberally onto the brass/stainless steel part and the oxygen-compatible Tribolube 71 lubricant should be used on the o-rings, correct? Or are you saying that Tribolube 71 should be used on the part threads as well?

    TRIBOLUBE71 Dive Equipment Manufacturer

    # of Dives: 200 - 499
    Location: Columbus Ohio
    Tribolube® EPO₂ is great to apply as a base coating for the entire assembly, and then use Tribolube® 71 oxygen compatible grease over the Tribolube® EPO₂ treated area. In dynamic applications you want a lubricant on the o-rings. In static applications the Tribolube® EPO₂ is enough to do the job, but a small amount of lubricant is beneficial. In threaded components the contacting surfaces will never be more than 80%. On average it is likely to be a 67% fitted to a 33% void area. What is the best way to deal with over 30% non contacted area vs. the mated threaded surface? Filling the negative space with material varies by industry; Teflon® tape, pipe dope, and grease are common. The fitted surfaces are suitable for a majority of low pressure applications, but when higher pressures of 3,000 psi are constant it is best to fill these void areas.
    Using Tribolube® EPO₂ as a protective base coat and Tribolube® 71 over the treated area is my personal recommendation.


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