Water-based epoxy primer

Water-based epoxy primer

Product Introduction:

It is a two-component water-based coating composed of water-based epoxy resin emulsion, anti-rust pigments and fillers, additives, deionized water, and water-based amine curing agent.

Usage:

It can serve as a high-performance anticorrosive primer for non-submerged steel structures where strict solvent emission requirements are imposed.

It can be applied on steel surfaces in various corrosive environments, such as petrochemical plants, power stations, bridges, and other anti-corrosion coating applications.

Being a double emulsion system, it dries quickly with short recoating intervals, suitable for coating new substrates and also ideal for maintenance under other conditions.Engineering Cases

Technical Indicators:

Color                Iron red, gray

Gloss                Matte

Adhesion (cross-cut test)    1level

Impact Resistance            50Centimeter

Flexibility              1Millimeter

HardnessHB

Typical Thickness            Dry Film Thickness50±10Micron

Water Resistance              120Hours

Salt spray resistance            360Hours

Theoretical Coverage          4.2Square meters/Kilograms or5.5Square meters/Liters (dry film thickness)60Micron)

Flash Point                Base Material (Component) Curing Agent (Component) After Mixing

                     ≥101℃         ≥101℃         ≥101℃

Specific Gravity                1.3+0.1Kilogram/Liter

VOCContent <80Grams/Liter

Construction technology:

1, Substrate Treatment

All surfaces to be coated should be clean, dry, and free from contamination. Prior to painting, all surfaces must be prepared in accordance with

ISO 8504：1992Evaluation and processing shall be conducted according to standards.

If the surface to be coated has grease, it should be cleaned with solvent until it meets theSSPC-SP1standard.

The application of water-based coatings must strictly adhere to all cleanliness standards.

Sandblasting (shot blasting) treatment

The steel surface is sandblasted toSa2.5（ISO 8501-1：1988) orSSPC-SP6standard.

If oxidation occurs on the steel surface after sandblasting and before applying the water-based epoxy primer, the surface must be re-sandblasted to meet the specified visual standards before proceeding with construction.

2thinner, diluent 

Clean tap water or deionized water   

3, two-component formulation

This product comes in two separate cans. Each time, the components must be mixed according to the specified ratio and used within the designated mixing period. The end of the mixing period is not indicated by an increase in viscosity. Although25under °C conditions,6after hours the mixture may still appear usable, the protective properties of the paint will have significantly degraded by this point and should no longer be used.

• 11. Use a power mixer to thoroughly stir base material (A) until uniform;2. Mix the curing agent and base material according to the specified ratio, then use the power mixer again to achieve complete and even blending.

• 2. Mix the curing agent and base material according to the specified ratio, then thoroughly blend using a power mixer.

• 3、Mixing ratio: Mass ratio 100:15-20

• 4、MixingShelf life after mixing10℃          25℃         30℃  

                             6Hours4Hours3Hours

4、Painting environmental requirements

Apply by air spray or airless spray method. Before use, thoroughly rinse the equipment with tap water, followed by pure water.

For maximum edge protection and film thickness, air spraying or airless spraying is recommended.

During storage, water-based epoxy primer must always maintain a certain temperature to prevent freezing. It is recommended to storeat 25°C.℃。

The minimum temperature of steel during coating must exceed5℃, and be at least above the dew point3℃。

The relative humidity during coating should be below70%, otherwise the drying and recoating time will be significantly prolonged; the relative humidityshould be above 30%, otherwise the film-forming performance of the paint will be poor. The temperature during coating must be maintained between5℃and 35℃to achieve the optimal paint film condition. At a temperature of 30℃When there is good air circulation around,

circulation to achieve a higher relative humidity.

Good air circulation must be maintained around the coated object after painting.

Small confined spaces that are difficult to ventilate should be brush-applied to prevent excessive coating thickness.

The environmental temperature during application is lower than the minimum film-forming temperature of the coating or poor ventilation, which can result in poor film formation.Or it may crack into a powdery state, necessitating the removal of the old paint film and repainting.

The viscosity of water-based epoxy primer gradually increases over time after mixing. If the specified pot life is exceeded, the performance of the cured film will be affected and unable to reach the specified standard.

Applying water-based epoxy primer too thickly will extend the minimum recoating interval and drying time, and may adversely affect the recoating interval of subsequent layers.  When using water-based epoxy primer, its viscosity gradually increases over time after mixing. If the specified pot life is exceeded, the performance of the cured film will be compromised and fail to meet the required standards.

For applications requiring durability, high gloss, color retention, and good decorative properties, the recommended topcoat should be applied.

Water-based epoxy primer will experience chalking and fading when exposed to the atmosphere, but it does not affect its anti-corrosion performance.

5Application methods 

• Spraying (airless/air-assisted), brushing, rolling

• Airless Spraying：Recommended for Use，Nozzle Diameter0.38-0.51Millimeter

                        Nozzle pressure not less than17.6MPa

• Air Spray：Recommended for Use，Spray GunMBC %%JGAJGA

                        Air volume  704Or765

                        Spray nozzle  E

• Brush application：Suitable for small area repairs, typical thickness40Micron

• Roller coating：Suitable for small area repairs, typical thickness40Micron

6Cleaning

• It is recommended to rinse all equipment with purified water after construction.

• It is recommended to clean the equipment periodically during construction based on factors such as spraying volume, temperature, and time.

• Dispose of remaining paint and packaging materials according to local regulations.

Drying conditions

8Product compatibility   

Water-based epoxy primer can be used in combination with various water-based and solvent-based coatings, including:

Water-based coating          

Water-based epoxy micaceous iron oxide intermediate paint

Water-based epoxy topcoat

Water-based acrylic polyurethane topcoat

Water-based polyurethane topcoat

Solvent-based paint

Epoxy topcoat

Acrylic polyurethane topcoat

For other compatible primers or topcoats, please consult Shaanxi Baota Mountain Paint Co., Ltd.

Safety Precautions:

This product should be used by professional coating operators in production facilities according to the recommendations in this manual and the instructions on the packaging container.Do not use this product without reading the Material Safety Data Sheet.

• All work involving the application and use of this product must comply with relevant national health, safety, and environmental standards.Approval and regulations to be followed.

• When performing welding or flame cutting on metal materials coated with this product, dust and fumes will be emitted,so it is necessary to wear appropriate personal protective equipment and take adequate local exhaust ventilation measures.

Storage:

Storage Temperature0℃～35°C, sealedStore in a cool, dry, and well-ventilated place. Shelf life12months. If the shelf life is exceeded, the product can still be used if it meets the standard requirements upon testing. When the temperature is below0℃effective anti-freezing measures should be taken.During storage and transportation, it must not be exposed to frost.

Declaration:

The information provided in this manual may not be exhaustive. If this product is used for purposes beyond those explicitly recommended in the instructions without obtaining our company's prior written confirmation of suitability, the responsibility shall be borne solely by the user. While we strive to ensure all advice regarding this product is accurate, the quality and condition of substrates, as well as numerous factors affecting the application and performance of this product, are beyond our control. Therefore, unless we provide explicit written consent, we assume no liability for product performance or for any loss or damage (except those caused by our negligence) resulting from the use of this product. The contents of this manual are subject to periodic updates based on practical experience and our company's ongoing product development policies.