Coating Reference Handbook - Hempel

HEMPEL
GALVANIZING S4
Most commonly painted Galvanizing (Metal Coating) types are:
TYPE: COMMON USE:
Hot dipped Galvanizing: Structural Elements, Lightpoles, Handrails,
(Fresh) Roadguards. Side and roof panels on
Reefer Containers.
Hot dipped Galvanizing: As fresh hot-dipped galvanizing.
(Weathered)
Electrolytic galvanizing: Sheets, bolts and minor equipment.
Zinc-Aluminium
Galvanizing (Sendzimir) Sheets, Facade Panels
SURFACE PREPARATION:
Surface preparation allways depends on later performance exposure. The
more severe - the more thorough surface preparation is required.
What matters is to obtain the necessary adhesion of the coating.
Any white rust protection treatment of electrolytic or Sendzimir
galvanizing must be removed.
Later Performance
Exposure: Min surface prep Primer type Total DFT
MILD Degreasing */ 1, 2, 3 or 4. 80-110 micron
MEDIUM Degreasing+
(+ Phosphating. **/
or Abrasive Sweeping)
2, 3 or 4. 110-150 micron
SEVERE Abrasive Sweeping
to a dense profile
Standard Epoxy-150-300 micron
barrier system
IMMERSION NOT RECOMMENDED
*/ On weathered galvanizing white rust formation must be removed
mechanically.
**/ Some tradenames for phosphatising solutions are LITHOFORM and
"T"-WASH.
Primer Type (2006-status):
1: For Alkyds HEMPEL'S UNI PRIMER 13140
NB: Only for MILD exposure
2: For Physically Drying HEMPADUR PRIMER 15552
3: For Epoxies and PU.s HEMPADUR PRIMER 15552
4: For WB Acrylics HEMUCRYL 18200 or HEMUCRYL 18032
Indicated HEMPEL primers may not necessarily be
found in the HEMPEL Book.
INSPS4 ed6 VALIDITY SUBJECT TO CONFIRMATION 17/05/05 EMi