This product has a wide use
in the protection of steelwork under the most severe conditions and
where colour and decorative effect are not important. It has excellent
resistance to fresh or salt water immersion, to salt spray, and resists
attack by splashing or intermittent spillage with a range of chemicals
and solvents. Typical uses are the supporting steelwork and deck undersides
on offshore production platforms; ballast spaces and storage of non-potable
water, bridge supports and lock gates; external and internal of floating
roof storage tanks; steelwork in chemical plant subject to hot moist
or alkaline atmospheres and spillage. (For acidic conditions chlorinated
rubber or vinyl high build systems are recommended.)
PHYSICAL CHARACTERISTICS
OF WET PAINT
(Typical
colour-Black Brown will vary)
Pigment
composition
Internet mineral extenders
Pigment
%
25 ± 2
Binder
type
Coal tar pitch, epoxy
resin, polyamide curing agents
Binder %
50 ± 2
Thinner
composition
Aromatic and hydrocarbons
/Glycolether
Thinner%
25.0 ± 2
Volume
solids%
57 ± 2
Specific
gravity of paint
1.23 ± 0.02
Base: Activator
ratio by volume
3 : 1
Pot life
at 30º C
4 hours
at 20º C
8 hours
at 7º C
10 hours
PHYSICAL CHARACTERISTICS
OF DRY FILM
Drying
time of Standard thickness
at 30º C
12 Hours
at 20º C
24 hours Not suitable for use
at temperatures
at 7º C
36 hours below 7º C
Recoating times
at 30º C
6 days
48 Hours
at 20º C
20 days
72 Hours
at 7º C
36 days
92 Hours
N.B. - Epoxy
curing
The curing of Epoxy resin-based
coatings is temperature dependant. It is seriously retarded
before 5º C (41º F).
Standard
thickness
Wet Paint
150-200 microns (8.4-11 Mils)
Dry film
85-120 microns (5-8 Mils)
Theoretical
coverage on smooth surfaces
5-6.6 m2 /litre (12.0-19.1 sq.
yds/imp.gln.
APPLICATION
Brush/roller
May require
additional coats to build up film thickness
Conventional
spray
Not recommended
Thinner addition
by volume
Upto 5%
Recommended
thinner
Epoxy thinner
SURFACE PREPARATION
Blast clean to BS 4232:1967
'Second Quality'(Swedish Standard SA 2 ½) or SSPC SP6 minimum.
Peak to through profile should not exceed 100 microns (4 Mils). Open
blasting using non-siliceous grits may yield profiles in excess of
100 microns (1 Mils) and may need increased paint film thickness.
Coal tar Epoxy Two-Pack can be applied direct to the blast-cleaned
steel or over a suitable holding primer e.g. Zinc Rich Primer Two-Pack,
Epoxy Zinc Phosphate Primer Two-Pack, Epoxy Protective Primer Two-Pack,
depending upon the exposure environment.Where Coal Tar Epoxy Two-Pack
is applied direct to blasted steel, prime immediately after blasting.
If this is impractical both blasting and priming must be completed
within the same working day and before the standard of blasting has
deteriorated. Where application is to an existing holding primer,
this should be sound, clean and firmly adhereing. (Polyvinyl butyral
shop primers should not be used under conditions of continuous immersion
or in conjuction with cathodic protection.) All contamination should
be removed; preparation must include washing with fresh water to remove
soluble salts.
PAINT SYSTEM
2 coats Coal Tar Epoxy Two-Pack,
each 125-150 microns (5-6 Mils) dry film thickness over a suitable
primer. Or 2 or 3 coats Coal Tar Epoxy Two-Pack, each 125-150 microns
(5-6 Mils) dry film thickness direct to blast cleaned steel, the first
coat immediately after blasting. (See 'Surface Preparation') Refer
to 'Physical characteristics of dry film' for recoating schedule.
