Chemical Resistance Guides of Composites

Thread by Donald Green on 07 Apr 2010 at 22:03:19 
Dear All:

I read somewhere in the section on CheFEM software that the software replaces the traditional chemical resistance guides or at least adds more value than traditional corrosion guides (a table with ranking of chemicals as function of concentration, temperature and sometimes pressure). Especially for composites, laminates and biological based materials.

I understand the novel integrated diffusion, chemical, mechanical approach, but have problems to transpose this to a handy chemical resistance guide. Could this be explained more thoroughly?

Thanks,
Donald

    Comment by Composite Agency on 15 Apr 2010 at 21:59:24  | |responses: 0|
    Dear Donald,

    Thanks for this thread.

    In following occasions chemical resistance guides of the well-established (raw) material supplier can be used without problems:

    * for the described chemical or exact mixture (e.g. 5% HCL concentration) AND
    * in a basic shape (plane sheet, box, cylinder) AND
    * at the exact described temperature and pressure AND
    * for the short term (say 1 to 5 years).

    In the following circumstances CheFEM is advised in addition to the chemical resistance guide:

    * mixtures that are not described in the chemical corrosion guide;
    * more complex shapes / complex laminate build-ups;
    * reinforcements;
    * severe temperature and pressure conditions, including supercritical and thermal spiking (including rapid gas decompression);
    * for the medium and/or long term (say more than 5 years).

    Hope this helps ;-)

    Kind Regards,
    Composite Agency