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  1. rembrandt

    Marine Grade Paint System

    Could I respectfully suggest that you change the specification to the following: Blast to SA 2.5 Prime, 65 microns DFT of Zinc Rich Epoxy Finish Coat of Polysiloxane Urethane to DFT 150 microns. Total DFT of 215 microns. The above will give superior Gloss Retention, Colour Stability and...
  2. rembrandt

    Experience with Epoxy coating for interior of large diameter tanks

    Guys, The difference between the latter 2 tanks and the original owners query is that your tanks are in Demin water service, and his isnt. I would suggest a far better solution to the original problem is to line the tanks with a solvent free (100% Volume Solids) Glass flake reinforced Vinyl...
  3. rembrandt

    Rec. for subsurface paint coatings?

    Tigit, I would suggest a Glass Flake reinforced epoxy, solventless would be best, I reckon 500 microns DFT would be appropriate for this service. (20 mils if you are using stateside terminology.)
  4. rembrandt

    Polymer Powder Coatings over Galvanized Steel

    This 'Outgassing' May not be from yje Zinc, but from the Flux residue left over on the surface of the galvanizing, remember the Steel has to pass through the flux on the way into the zinc bath, and on the way out. You could try Degreasing and treating the surface with a Mordant solution, this...
  5. rembrandt

    heat disapating coatings

    The 'Why' you are seeking is simple physics, dont you remember from your schooldays, Black absorbs heat ! especially Matt Black... but remember that heat that has been absorbed has to go somewhere, and that is the substrate, this may in time have a detrimental affect on your external powder...
  6. rembrandt

    URGENT - coating steel structure in marine enviroment

    Try and find your nearest 'Zenga' Stockist, This stuff is made in belgium, and is used extensively by the Belgian Navy, I specify its use here in Petrochemical Plant in Scotland. Must be the nearest thing to 'Cold Galvanising' It is actually a very high zinc content in the dry film paint, it...
  7. rembrandt

    PAINTING OVER GALVANIZING

    My recommendations would be to degrease, fresh water wash, apply a 'Mordant Solution' ie 'T' Wash. after chemical changes have taken place, Fresh Water wash, paint using a High Solids Surface Tolerant Epoxy eg. Carbomastic 15, or Interplus 256, or something of that generic type, apply 125...
  8. rembrandt

    Painting and Paint Preparation Definitions

    The term 'Reversible' refers to the Fluid tip, or to put it more simply, the exiting orifice that is where the atomisation of the paint takes place. on some set ups, these tips are set into tip holders that allow you to rotate the tip should it get blocked by particulate matter or debris in the...
  9. rembrandt

    Hydrofloric Acid

    1. Hydroflouric Acid is used in the Alkylation Process in the Oil Refining Industry, usually for producing Unleaded Fuels. 2. Aluminium, Carbon Steel and Monel all resist attack by HF and the plants generally are made of these materials. 3. Do Not use Stainless Steels or Silicone Gaskets, they...
  10. rembrandt

    Voltage for holiday test

    The 'norm' for Holiday testing of the coatings you name is 4 Volts per micron, or in your case 4 volts X 3,000 microns or put simply, 12Kv, not 14Kv as you state. it matters little if these coatings are vessel internals, or applied to the external of piping or equipment, it is the Di-electric...
  11. rembrandt

    Galvanizing Studs

    If as TVP states Acid Pickling creates Hydrogen Embrittlement, then this can occur during the Galvanising process, as part of the preparation for galvanising is to Acid Pickle items prior to Galvanising, especially smaller delicate items like Nuts, Bolts, Threaded Stud Bar etc. We here specify...
  12. rembrandt

    Does zinc galvanizing contain other heavy metals?

    Well Chaps, Hello, Greetings from the European side of the pond. over here, it is considered normal to add up to 5% aluminium to our Hot Dip Zinc Galvanising bath. So....'Alzheimers Anyone ??' What with all the 'E numbers' preservatives, anti-oxidants, artificial colourants, sweeteners, and...
  13. rembrandt

    Paint for use at 200¦C

    Ed, Do you mean that the Item to be coated will be at 200 Celsius at the time of Application ? or do you mean the temperature at time of application is ambient, but the coating will see service at 200 Celsius, when the item is in operation. If it is the former, try Belzona for a heat cured...
  14. rembrandt

    Hello, What is suitable solvent f

    As a specifier in the Petrochemical Industry, sometimes when working on Live Plant, we have to specify 'Non Impact' methods of surface preparation, we use Chemical Rust Removers after scraping the Loose Flaking or "Scabbing" Rust from the surface. These Rust Removers are not to be...
  15. rembrandt

    thermal insulation with high compressive strength?

    Cedric, as a specifier myself, for a major Oil company, I have already used Syntactic Epoxy Foam for a sub-sea Insulation problem. I suggest you get hold of the Technical People from Akzo-Nobel, International Protective Coatings. They have a specialist Division that manufactures a material...
  16. rembrandt

    FLOOR COATING

    I respectfully suggest you contact a company we here at BP use, they deliver worldwide for this application. Company Name: Chemco International Telephone No. + 44 (0)1236 606060 Facsimile No. + 44 (0)1236 606070 E-mail. chemcoint@aol.com Contact Name: Manny Khorasani. I am a specifying...
  17. rembrandt

    Transparent Composites

    There are several manufacturers of transparent Composite materials, but suggest you consider Radiation Cured Materials (Not as bad as it sounds, they are cured by U.V. Radiation, better known as 'Ultra Violet Light' ) Contact Akzo-Nobel, or Fibatech Industries of Holland, or Global Solutions Ltd...
  18. rembrandt

    We need to hydro blast steel prior

    It would be beneficial to apply your Epoxy Primer on a surface that has a profile, to give a mechanical 'Anchor' to the coating. As you quite rightly state, Hydroblasting ( Or U.H.P. Jetting) does require Abrasive Injection to produce a surface profile. The type of abrasive is crucial to give a...
  19. rembrandt

    Chrome Plating standard.

    I dont relly expect you to gain anything from your adhesion test. There are gauges available on the market, (Try Elcometer, Droylsden, Manchester, England for instance) They will be able to supply you with a Dry Film Thickness Gauge, they can supply for non magnetic coatings (Chrome For...
  20. rembrandt

    RBI software

    Try 'CREDO' by Shell Global Solutions, its what we use, and it is compatable with all kinds of Microsoft software, eg. Access, Powerpoint, etc

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