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  1. mbrown

    What's the deal with silicone?

    A lot of paints have at least some silicone in them already. Certianly all automotive and marine grade paints do. The trick is that silione can be hard to control, it tends to want to come out of solution under the best of situations which is part of the point since it migrates upward in baked...
  2. mbrown

    Testing membrane

    There is a table of particle sizes for given colors at http://www.handprint.com/HP/WCL/pigmt1.html#particlesize You should be able to get these pigments at most art stores and any university art supply. All of them are water based and relativly non-toxic. Make sure to stir them completely to...
  3. mbrown

    looking for a membrane supplier

    I am looking for a supplier to help me design a membrane system that would have a sacrifical liquid and a membrane that would be permable to zinc, nickel, and chrome and inpermable to a large-molecule weight emulsion polymer. I dont think my situation is that difficult but I need to find...
  4. mbrown

    Sticky situation: Engneering in Ecoat

    Being a bulk coater I need to use barrels to hold my parts during the painting process. But this creates a interesting problem in that the hubs of the barrels are in the bath the whole time the parts are painting. I wanted to know if anyone has had any experience with keeping ecoat out of...
  5. mbrown

    Chemical resisitive coating for steel

    Your best bet for true chemical resistance is a teflon based coating. I dont think that you would need a very thick coating to get suffient protection but the price per square foot is likley to be higher than most other coatings...
  6. mbrown

    Help!!

    Indumathis, If your unit has a tank for cleaning in place I would try a complete cleaning first. Call your membrane supplier and find out what cleaning solvents they recommend for your unit and pick the harshest one compatable with your material. Find out from them if you can backflush your...
  7. mbrown

    Ultrafilteration in the presence of heavy metals

    I am looking for suggestions for an electrocoat line. The paint has 15% emulsion solids, 3% butyl cellusol, and 82% water. Unfortunatly it also has high levels of zinc, nickel, and chrome. The exclusion is in the 0.05micon range and static ultrafilter membrane of that size do not last long in...

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