China H06-4 Epoxy Zinc-Rich Anti-Corrosive Primer Paint

h06-4 epoxy zinc-rich anti-corrosive primer
Q/GHTD 76
COMPOSITION Two-pack high build (HB) primer consists of zinc dust, epoxy resin, polyamide curing agent, additives, solvent and etc..
CHEIF CHARACTERISTICSLarge quantity of metal zinc dust contained in film, so it will play a cathodic protective action.Excellent anti-corrosive properties and can be maintained within long period.Excellent adhesion and impact resistance.Excellent abrasion resistance.Excellent salt-spray resistance.Resistance to a wide range of oil and solvent.Fast dryingCan be compatible with most of high-performance anti-corrosive paints and finishes.Approved by CCS.USAGE
It is used as an anti-corrosive primer in heavy-duty anti-corrosive coating system, coated on steel structures, such as harbour machine, heavy-duty machine, apparatus for recovering petroleum and foe mine, hull above ship bottom and deck, bridge, pipeline buried under ground, external wall of gas-holder and etc.. It is the perfect primer to be top coated with epoxy type middle and finish.
Colour Grey, matt
Application Data
Mixing ratio part A to part B=91:9(W/W)
Dry film thickness 80μm
Wet film thickness143μm
Theoretical coverage rate 314 g/m2
Flash point:Part A ≥27ºC
Part B ≥27ºC
Dry time: surface dry ≤30min
Hard dry ≤24h
Full cure7d
Induction period(after mixing, 20ºC) 30 min
Pot life(after mixing)

Air temperature5ºC25ºC30ºCPot life24h8h6h

When air temperature is high than 30ºC,pot life will be shorten accordingly as the rising of air temperature.
interval before recoating

Substrate temperature10ºC25ºC30ºCMin.48h24h16hMax.Several months, but no zinc salts on the film

The film shall not be exposed in open air long before the subsequent coat being applied, because zinc salts (white rust) will be formed on the surface. If longer interval is needed, application of a coat of 842 Epoxy MIO anti-corrosive paint is recommended as a sealing layer as soon as possible to reduce the secondary work of surface preparation.Though the zinc salts will not be formed on the film in clean environments in or out of the door for months. If in industry environments or ocean environments, zinc salts will be formed quickly, and the painting interval shall be as short as possible.Any visible zinc salts must be prepared secondary by sweep blast-cleaning or mechanical cleaning, and surface contaminations and oil must also be removed before overcoating.Recommended
number of coats
One coat with d. f. t. of 50-80μm by airless spray, it is need two or three coats when coated by brush or roller.
Subsequent
coating system
Compatible with 842 Epoxy MIO anti-corrosive paint, 846 coal tar epoxy HB anti-corrosive paint, or finish and etc..
*but it can not be compatible with oil, alkyd, polyester type of paint or finishes.
Pretreatment
Recommended
Substrate Conditions Steel substrate with mill scaleBlast-cleaned to a grade Sa2.5, and surface profile(roughness) is 30-75 μm, or acid-washed to remove mill scale and rust, and then neutralized thoroughly, washed and passivated.Steel substrate without mill scaleBlast-cleaned to a grade Sa2.5, or abraded to a grade St3 by elastic disc-sander.Steel substrate coated with shop primerAbraded to a grade St3, either by sweep blast-cleaning or by elastic disc-sander.
APPLICATION CONDITIONS Must be at least 3ºC above dew point to avoid condensation When the application temperature is below 5ºC,the cross-linking reaction between epoxy and curing agent will substantially stop and application must not be carry out, please choose the product for winter.The relative humidity is below 85%.Application method
Airless sprayRecommended thinner: thinner 103
Thinner ratio: 0-10%(m/m)
Nozzle orifice: 0.4-0.5mm
Nozzle pressure: 15-17MPa (approx, 150-170kg/cm2)
Air sprayRecommended thinner: thinner 103
Thinner ratio: 0-10%(m/m)
Nozzle orifice: 2.0-3.0mm
Nozzle pressure: 0.3-0.6MPa (approx, 3-6kg/ cm2)
Roller/brush(limited to small area maintenance)
Recommended thinner: thinner 103
Thinner ratio: 0-5% (m/m)
Cleaner: Thinner 103
Safety precation
Reference to Material Safety Data Sheet(MSDS).
SHELFLIFE12 months
Remarks Dry and cure time of H06-4 Epoxy Zinc-rich Anti-corrosive primer will be shorten accordingly with the rising of temperatures may be referred to as following:

Substrate temperaturetouch dryFull cure10ºC 50 min>20 d15ºC 40 min15 d25ºC 30 min7 d30ºC 15 min5 d

When air temperature is between 5ºC and 10ºC,it can be conducted to apply H06-4 Zinc-rich Epoxy Anti-corrosive Primer, but its curing rate is very slow.When the temperature of substrate is below 5ºC, the cross-linking reaction between epoxy and curing agent will be substantially stop and application must not be carried out (in this case, it may be applied in coating shop in which the temperature is above 5ºC)During application and curing of H06-4 Zinc-rich Epoxy Anti-corrosive Primer, it is need to ventilate and exchange the air fully.NOTE Please read "Application guide" carefully beforehand, in order to use the product manufactured by our factory properly.
DECLARATION The information given in the sheet, which is based upon the background of experience in our testing and practice, may be as a guide of application. Since condition of application and service may be beyond our control, no liability can be accepted on basis of these data, and responsibility is taken for the quality of product itself by our factory beyond all doubt.
The factory reserves the right to modify data in accordance with the quality of product being improved increasingly without notice.