Anti Static Coating Supplier in China
Anti Static Coating Coating paint coating manufacture Shenzhen China  
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Anti Static Coating

PRODUCT SPECIFICATIONS:

Scope: These application instructions cover surface preparation, application equipment, and application of Honestjoy’S
ANTI-STATIC COATING HJ-870.
Steel work: For optimum performance, the following is recommended:
All welding seams must have a surface finish, which ensures that the quality of the paint system will be
maintained in all respects. Holes in weldings seams, undercuts, cracks, etc. should be avoided. If found, they
must be remedied by welding and/or grinding.
All weld spatters must be removed.
All sharp edges must be removed or rounded off in such a way that the specified film thickness can be built up on
all surfaces. The radius of the rounding should be minimum 2 mm.
. Any laminations must be removed.
All steel work (including welding, flamecutting, grinding) must be finished before the surface preparation starts.
Surface preparation: Prior to abrasive blast cleaning of the steel, remove oil, grease, salts and other contamination with a suitable
detergent followed by high pressure fresh water hosing. Alkali deposits on new welding seams as well as soap
traces from pressure testing of tanks to be removed by fresh water and scrubbing with stiff brushes.
For optimum performance, grit blast to very near white metal, Sa 2½-38. In practice this
requirement is to be understood as white metal Sa 3 at the moment of abrasive blasting, but allows a slight
reduction at the moment of paint application.

Steel grit with particle sizes of 0.2-1.2 mm or aluminum silicate of 0.4-1.8 mm will usually create the desired
surface profile when the air pressure measured at the nozzle is 6-7 bar/85 -100 psi.
The compressed air must be dry and clean. The compressor must be fitted with suitable oil and water traps.
When the abrasive blasting is completed, remove residual grit and dust by vacuum cleaning. Abrasive particles
not removed by vacuum cleaning are to be removed by brushing with clean brushes followed by vacuum
cleaning.
The importance of systematic working must be stressed when blasting. Poorly blasted areas covered with dust
are very difficult to locate during the blast inspection made after the rough cleaning.
Application equipment: Honestjoy’S ANTI-STATIC COATING HJ-870 is to be applied by airless spray equipment, air spray equipment
and brushing.
Airless spray equipment: A large pump is preferred, with a pump capacity of 8-12 litres/minute.
Pump ratio: Min. 45:1
Nozzle orifice: .018"-.021"
Nozzle pressure: 0 bar (2900 psi)
Hoses: To avoid excessive loss of pressure in long hoses, hoses with an internal
diameter of up to 0.5" can be used
(Airless spray data are indicative and subject to adjustment).
Thinning: Airless spray or brushing max. 5% of HJ-0702, possibly higher if tendency to dry-spray will require
more thinning e.g. at higher temperatures.
Air spray: max. % of HJ-0702.
Only add thinner to the mixed paint.
Spraying properties are influenced by the induction time (premix time). Too much "thixotropy" will disappear after
a certain reaction of the mixed components.
Cleaning of equipment: The whole equipment to be cleaned thoroughly with TOOL CLEAN HJ-0713 after use.
Mixing, pot life: a. Mix the entire content of corresponding base and curing agent packing. If it is necessary to mix smaller
portions, this must only be done by measuring base and curing agent in the prescribed mixing ratio: 8.8
parts by volume base and 1.2 parts by volume curing agent.
b. Stir the mixed paint thoroughly by means of a clean mechanical mixer until a homogeneous mixture is
obtained.
c. Allow the mixed paint to prereact before application, see table below.
d. Use all mixed paint before the pot life is exceeded. The pot life depends on the paint’s temperature as
shown in table below (valid for a liters can):

Temperature of mixed paint

(15℃/59℉1)

℃/68℉

25℃/77℉

(30℃/86℉2)

Induction time

(25 minutes)

15 minutes

10 minutes

(5 minutes)

Spray application within

(4 hours)

3 hours

2 hours

(1 hours)

1) Below 15℃/59℉ the viscosity can be too high for airless spray application.
2) Temperatures at 30℃/86℉ and above should be avoided due to a risk of dry-spray.
Film thickness: The total dry film thickness of the coating system must be controlled between 300-600 micron.
Corresponding to 100 micron/4 mils dry film thickness, the wet film thickness must be 165-190 micron/6-7 mils
and must be measured regularly.
Normally up to 0 micron/8 mils per coat may be accepted for 100 micron/4 mils specifications, but at
temperatures below 15℃/59℉, it is important not to exceed a dry film thickness of 150 micron/6 mils in any area.
Microclimate: The actual climate conditions at the substrate during application:
The minimum surface temperature during application is 10℃/50℉.
Furthermore, the steel temperature should be kept reasonably constant - within the range of ± 3℃/5℉ is
recommended.
The maximum surface temperature should preferably be below approximately 30℃/86℉. In a warm climate it is
recommended to carry out application during nighttime. Application at higher temperatures is possible, but extra
care must be taken to avoid poor film formation and excessive spray-dust.
The steel temperature must be above the dew point. As a rule of thumb a steel temperature which is 3℃/5℉
above the dew point can be considered safe.
The relative humidity should preferably be 40-60%, maximum 80%. In confined spaces, supply an adequate
amount of fresh air during application and drying to assist the evaporation of solvent.
Drying/curing and ventilation: In a dry film thickness of 100 micron/4 mils, with a steel temperature of ℃/68℉, a relative air humidity of
maximum 80% and adequate ventilation, anti-static coating HJ-870 will be dry to touch after 4-6 hours.
Under these drying conditions, the paint film will accept light traffic after approximately 16 hours.
In confined spaces, supply an adequate amount of fresh air during application and drying to assist the
evaporation of solvent.
Curing time: Provided that adequate ventilation, recommended relative humidity, specified dry film thickness, and
r ecommended minimum recoating interval are kept, the following curing times are valid:

Steel temperature

10℃/50℉

15℃/59℉

℃/68℉

25℃/77℉

30℃/86℉

35℃/95℉

40℃/104℉

Curing time

18 days

14 days

10 days

8 days

7 days

6 days

4 days

Recoating intervals: Provided observance of the above stated ventilation and relative humidity for the following recoating intervals in
relation to the (steel) temperature are valid:

Steel temperature

10 /50 *℃ ℉

15℃/59℉

℃/68℉

25℃/77℉

30℃/86℉

35℃/95℉

Minimum:

- Between the second coat first and the

90hours

60hours

36hours

24hours

18hours

14hours

- Between the second and the third coat

60hours

40hours

24hours

16hours

12hours

9hours

Maximum:

47days

34days

21days

16days

14days

11days

* Absolute minimum temperature recommended.
The maximum relative humidity during application should not exceed 80% and the steel temperature should
always be above the dew point, in practice minimum 3℃/5℉ above the dew point.
Conditions for paint
application work:
Dry spray is not acceptable as this will reduce the protective characteristics of the paint and make later surface
cleaning difficult. Dry spray can be avoided by using adequate staging, spraying equipment and methods.
Hold spray gun at a right angle to and about 30 cm/1 foot from surface making even parallel passes at a rate to
produce the specified wet film thickness as per specification.
Avoid dry spray by using a smaller fan angle and the lowest possible pressure.
Each layer must be applied homogeneously, must be free from pinholes and other defects and as near above the
specification of 100 micron/4 mils dry film thickness, as possible. The consumption of paint must be controlled,
and heavy layers must be avoided because of the risk of sagging, cracks and solvent retention.
Surface irregularities such as dry spray, sagging, exaggerated thickness or embedded particles will have to be
remedied.
If sandpapering of the surface is needed, great care must be taken to avoid damaging of otherwise intact
surfaces. When using mechanical means only lightweight equipment should be used, orbital sander is
recommended. Yet, avoid sandpapering on top of welds or irregularities or near to vertical surfaces.
The finished coating must appear as a homogeneous surface without pores, runners or pollution of any kind.
Control of dry film thickness: For the standard specification following applies to the dry film thickness:
The minimum dry film thickness is 300 micron/12 mils, maximum recommended dry film thickness is 600
micron/24 mils (below 15℃/59℉: 450 micron/18 mils). The minimum dry film thickness is evaluated according to
the "80-" rule, i.e. no more than % of the total number of individual measurements must be lower than the
minimum dry film thickness, and the lowest individual measurement must be at least 80% of minimum dry film
thickness, i.e. 240 micron/9.6 mils. The maximum dry film thickness can also be evaluated according to the
"80-" rule.
Dry film thickness control must not be carried out within the first 24 hours after application of final coat (℃,
sufficient ventilation). The measurement must be carried out using an electromagnetic dry film thickness gauge
calibrated with shims placed on a smooth steel substrate.
Safety: Handle with care. Before and during use, observe all safety labels on packaging and paint containers, consult
Honestjoy Material Safety Data Sheets and follow all local or national safety regulations. Avoid inhalation, avoid
contact with skin and eyes, and do not swallow. Take precautions against possible risks of fire or explosions as
well as protection of the environment. Apply only in well-ventilated areas.

 



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