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...
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...
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.)
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
