Calculation of Steel Structure Paint and Welding Material Usage

　　III. Application: Used as a primer in conjunction with heavy-duty anti-corrosion coatings, suitable for ships and port facilities.

　　A coverage of approximately 8.5 square meters per liter for a coating with a thickness of 75 micrometers.

　　A thickness of 125 microns corresponds to approximately 6.5 square meters per liter.

　　A thickness of 200 micrometers corresponds to approximately 4 square meters per liter.

　　Generally, it is measured using units of volume.

　　The paint specification includes a theoretical coverage rate, which indicates how many liters of paint are required to coat 1 square meter to a thickness of 100 µm (or 50 µm—feel free to convert as needed). For instance, let's say this value is X%.

　　Therefore, the amount of paint required = x% × 25,000 × Paint Thickness / 100

　　After this result, you then multiply it by a loss coefficient, such as 1.3—this typically depends on the construction equipment used.

　　The net weight of welds on steel structures typically accounts for approximately 1.5% to 2% of the steel component's total weight. Based on this, welding electrodes are then selected. Since the stated weight is the net weight, the actual electrode weight will be slightly higher. When accounting for leftover electrode ends and the weight of the flux coating, the total electrode weight required generally ranges from 1.8 to 2.2 times the net weight.

　　Zinc-rich Epoxy Primer

　　I. Composition: A two-component system consisting of epoxy resin, zinc powder, solvents, and amine-based curing agents, among others.

　　Component Primer

　　II. Characteristics: Excellent corrosion resistance, strong adhesion, and high zinc powder content in the paint film.

　　, with excellent water resistance.

　　III. Application: Used as a primer配套with heavy-duty anti-corrosion coatings, applicable to ships and port facilities.

　　Structures, bridges, steel structures, oil drilling platforms, and chemical equipment, among others.

　　IV. Technical Requirements: HG/T3668-2000

　　Project Metrics

　　Color and Appearance: Gray, with varying shades, featuring a smooth and even paint film.

　　Viscosity, S (Ford cup No. 4) ≥ 20

　　Drying time, h, ≤ Surface dry: 1; Full dry: 24

　　Impact strength, kg·cm ≥ 50

　　Flexibility mm 1

　　Saltwater Resistance, Passes 72-hour Test

　　V. Construction References

　　1. The surface of the object to be coated must be free from scale, rust, oil stains, and other contaminants.

　　2. The substrate temperature must be at least 3°C above the dew point. When the substrate temperature falls below 5°C,

　　The coating film fails to cure, therefore construction is not recommended.

　　3. After opening the container of Component A, it must be thoroughly mixed and then added according to the specified mixing ratio while continuing to stir.

　　Please pour Component B into Component A, thoroughly mix until uniform, and allow it to stand and mature for 30 minutes.

　　Afterward, add an appropriate amount of thinner and adjust to the desired application viscosity.

　　4. The paint mixture must be used within 6 hours after mixing.

　　5. Brush coating, air spraying, and roller coating are all applicable.

　　6. During the coating process, continuous stirring is essential to prevent sedimentation.

　　7. Coating Interval

　　Substrate Temperature, °C: 5–10, 15–20, 25–30

　　Minimum interval: 48, 24, 12

　　The maximum interval shall not exceed 7 days.

　　8. Recommended Film Thickness: 60–80 µm.

　　VI. Transportation and Storage

　　1. During transportation, the product should be protected from rain, direct sunlight, and impacts.

　　And shall comply with relevant regulations of the transportation authorities.

　　2. The product should be stored in a cool, well-ventilated area, protected from direct sunlight, and kept away from other items.

　　Store in a fireproof and heat-source-free warehouse.

　　VII. Safety Protection

　　The construction site should be equipped with adequate ventilation facilities, and painters must wear goggles and gloves.

　　Masks and other protective equipment should be used to prevent skin contact and inhalation of paint mist. Open flames are strictly prohibited at the construction site.

　　Performance: It is an electrochemical protective coating. This paint exhibits excellent corrosion resistance.

　　It has excellent mechanical properties, strong adhesion, and exhibits both conductivity and cathodic protection. It can be used as a coating for vehicles.

　　Apply a pre-coated primer with a film thickness of 15–25 µm before welding, ensuring that it does not affect the welding performance.

　　The product is also commonly used as an anti-rust primer.

　　Applications: Suitable for oil storage tanks, bridges and ships, as well as offshore oil drilling platforms.

　　Structural steel equipment surfaces in industries such as harbor facilities, metallurgy, and chemical engineering are treated as the most basic layer.

　　The anti-rust primer can also be used as a maintenance primer after steel plate polishing or sandblasting.

　　Key Technical Indicators:

　　Surface dry ≤1 hour, fully dry ≤24 hours

　　Applicable duration ≥ 5 hours

　　Impact Resistance: 50 cm·kg

　　Salt Spray Resistance: Capable of withstanding salt spray for 72 hours

　　Safety and Sanitation Regulations

　　Composed of epoxy resin, ultra-fine zinc powder, thickeners, solvents, and additional components, this product employs polyamide resin as the curing agent. It is available in separate甲 and 乙 two-component packages. Featuring exceptional cathodic protection and outstanding anti-rust performance, it also demonstrates strong adhesion and superior resistance to both oil and water.

　　Toxicity. Store in a cool, well-ventilated, dry place, away from fire sources and heat.

　　During transportation, protect from rain and direct sunlight. When in use, adhere to safety regulations for coating operations.

　　Procedures and process operation guidelines: During construction, ensure proper ventilation on-site and implement fire prevention and static electricity protection measures.

　　Electricity, measures to prevent poisoning, etc.

　　Transportation and Storage

　　1. This coating is a flammable material; therefore, its transportation and storage must comply with national regulations for flammable substances.

　　Full regulations.

　　2. Should be stored in a cool, well-ventilated, and dry indoor environment; exposure to rain is strictly prohibited.

　　Exposure to sunlight and proximity to fire sources.

　　3. The shelf life is one year.

　　H06-1 Epoxy Zinc-Rich Primer for Workshop Use (Two-Component)

　　Product Description

　　It is a two-component epoxy polyamide addition-type shop primer with a hard, abrasion-resistant coating that exhibits excellent anti-rust performance. It provides cathodic protection to localized damaged areas and minimizes burn-through during electric welding or cutting operations. The coating maintains its specified thickness within the recommended range, ensuring no adverse impact on welding performance. Additionally, it offers superior resistance to oil and water exposure.

　　Design Purpose

　　Steel materials treated with shot blasting or sandblasting are coated with a maintenance primer, ensuring a service life of up to 9 to 12 months.

　　Physical Parameters: Color - Gray

　　Coating Film Thickness: Wet Film – 40 μm, Dry Film – 20 μm

　　Theoretical coating rate: 95 g/m² ± 0.5

　　Specific gravity is approximately 2.30.

　　Drying Time at 23±2℃: Surface Dry ≤ 5 min, Fully Dry ≤ 24 h

　　Fully cured at 23±2℃: 7 days

　　Flash point: Component A at 24°C, Component B at 27°C

　　Storage Period: 12 Months

　　Construction Instructions: Mixing Ratio – Component A (Paint) : Component B (Curing Agent) = 10:1

　　Curing Time at 23±2℃: 0.5–1 hour

　　Applicable period at 23±2℃: 8 hours

　　Construction Methods: High-Pressure Airless Spraying, Air-Assisted Spraying, Hand Brushing, and Roller Coating

　　Diluent X-7 for Epoxy Coating, Dilution Ratio <5%

　　Coating interval at 23±2℃: Minimum 16 hours; no maximum limit.

　　Surface Treatment for Workshop Production Lines: Steel surfaces are treated using methods such as shot blasting or sandblasting to remove scale and rust, ensuring compliance with the Swedish rust removal standard Sa2.5 or achieving manual rust removal equivalent to St3 grade.

　　After-sales supporting coatings include epoxy resin coatings, epoxy asphalt coatings, chlorinated rubber coatings, acrylic resin coatings, alkyd resin coatings, phenolic resin coatings, polyurethane coatings, chlorosulfonated polyethylene coatings, and high-chlorinated polyethylene coatings, among others.

　　Important Notes

　　Due to the high zinc powder content, it is recommended to use mechanical stirring to thoroughly mix Component A before adding Component B and mixing again until homogeneous. Additionally, the surface of zinc-rich primer is prone to forming zinc salts; therefore, prior to applying subsequent coats, any residual zinc salts on the surface must be completely removed. Failure to do so will compromise the interlayer adhesion of the coating film.

　　Notes

　　This instruction pertains to data obtained in the laboratory and can serve as a construction guideline. Actual products may vary slightly from these specifications. Please note that this product is intended solely for professional use. For applications beyond the specified scope or construction activities conducted under conditions we are unaware of, we guarantee only the quality of the coating material itself.

　　H06-1-1 Epoxy Zinc-Rich Primer (Two-Component)

　　Product Description

　　Composed of epoxy resin, ultra-fine zinc powder, thickeners, solvents, and more, this product utilizes polyamide resin as the curing agent. It is available in separate甲 and 乙 two-component packages. Featuring excellent cathodic protection and outstanding anti-rust performance, it also boasts strong adhesion as well as superior oil and water resistance.

　　Design Purpose

　　The heavy-duty anti-corrosion coating system for steel structures serves as a long-lasting, universal primer and can also be used as an anti-rust paint for galvanized components.

　　Physical Parameters

　　Color: Gray

　　Wet Film Thickness: 80–8 µm Dry Film Thickness: 40–8 µm

　　Theoretical coating rate: 180 g/m²

　　Specific gravity is approximately 2.30.

　　Drying Time at 23±2℃: Surface Dry ≤ 30 min, Fully Dry ≤ 24 h

　　Fully Cured at 23±2℃: 7 days

　　Flash point: Component A at 24°C, Component B at 27°C

　　Storage Period: 12 Months

　　Construction Instructions

　　Mixing Ratio: Component A (Paint) : Component B (Curing Agent) = 9 : 1

　　Curing time at 23±2℃: 0.5–1 hour

　　Applicable period at 23±2℃: 81 hours

　　Construction methods: High-pressure airless spraying, air spraying, manual brushing, and roller coating

　　Diluent X-7 for Epoxy Coating, Dilution Ratio <5%

　　Painting interval at 23±2℃: minimum 16 hours, maximum unrestricted.

　　Surface Treatment: Steel surfaces shall be treated by methods such as shot blasting or sandblasting, ensuring they meet the Swedish rust removal standard Sa2.5 or achieve St3 grade through manual rust removal processes.

　　Post-process supporting coatings include epoxy resin coatings, epoxy asphalt coatings, chlorinated rubber coatings, acrylic resin coatings, alkyd resin coatings, phenolic resin coatings, polyurethane coatings, chlorosulfonated polyethylene coatings, and high-chlorinated polyethylene coatings, among others.

　　Important Notes

　　Due to the high zinc powder content, it is recommended to use mechanical stirring to thoroughly mix Component A before adding Component B and mixing again until homogeneous. Additionally, the surface of zinc-rich primer is prone to forming zinc salts; therefore, prior to applying subsequent coats, any residual zinc salts on the surface must be completely removed. Failure to do so will compromise the interlayer adhesion of the coating film.

　　**Note:** The data provided in this instruction were obtained under laboratory conditions and can serve as a construction guideline. Actual product performance may vary slightly. Please note that this product is intended strictly for professional use only. For applications beyond the specified scope or construction activities conducted without our oversight, we can only guarantee the quality of the coating material itself.

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