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Damaged coating inside concrete water tank

Posting by Alex on 24 Aug 2008 at 14:54:33.

Hello:

We have a problem with liners/coating on the concrete tanks filled with demineralized water in a nuclear power plant. Liners are:
- epoxy based and/or
- polyurethane based (both 1-2 mm thick)

Liner is separating ('blistering') from the concrete substrate. Do you have any experience or explanation? Can your chemical - physical simulation programme (the IDC-SAC tool) for coating assessment deal with this sort of industrial application in a proper manner? I really prefer a maintenance free and fit-for-our-purpose coating to concrete tank solution since the residual lifetime of the current solutions is less than a year or maybe even less than a month...

Thanks,
Alex

p.s. I am little resistant to another set of laboratory tests or some sort of quote for an inspection survey.

          follow up posts
    On 17 Nov 2008 at 15:03:44 Charles Lamb posts:
    Dear Alex:

    Further to the remark of Michael, I am curious whether - at an ambient temperature - a plastic, say epoxy, is required with or without glass fibres? I read that frp with glass flakes - although that the glass flakes add to the mechanical properties - are no good for the water, acid, alkaline (as is probably the case in the nuclear tank) FRP diffusion and chemical resistance. And what about FRP containing Chopped Strand Mat (CSM) or FRP with Woven Roving?

    What is the best FRP material avialable for these sorts of applications from the viewpoint of mechanical, corrosion resistance and permeation properties? Please help me since the available FRP corrosion and chemical resistance guides are not clear with this regards.

    Sincerely,
    Charles Lamb

    [responses: 0]

    On 13 Nov 2008 at 17:23:08 Michael Lee posts:
    Alex,

    What is the temperature of the water inside the tank?

    Regards,

    Michael
    [responses: 0]



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