Dachin Zinc 081
Epoxy zinc rich coating

Main Components

Two-component system: Component A contains medium molecular weight epoxy resin, zinc dust, pigments, rheological additives and solvents through dispersion grinding; Component B is amine curing agent.

Key Features

High zinc content provides exceptional corrosion protection through electrochemical action. Rapid ambient curing with excellent substrate adhesion and intercoat compatibility. Heat-resistant without compromising weldability.

Primary Applications

Widely used in bridge structures, stadiums, metallurgy, shipbuilding, and vehicle manufacturing. Ideal for steel structure corrosion protection across various industries.

Technical Specifications

Film Color & Appearance	Gray, smooth finish free from particles, pinholes or bubbles
Density, kg/L	1.95±0.05
Adhesion (Cross-cut Test), Grade	≤1

Packaging

	Net Weight / kg	Volume / L
A	30	13.6
B	3	3.3
Total	33	16.9

Basic Parameters

Mixing Ratio	By Weight: A︰B = 10︰1 By Volume: A︰B = 4.1︰1
Pot Life	6h at 5℃ | 5h at 15℃ | 4h at 25℃
Theoretical Coverage	Approx. 6.0㎡/L at 100μm DFT

Recoat Intervals

Temperature	Surface Dry	Hard Dry	Recommended Overcoating Interval
			Minimum	Maximum
5℃	120 min	18h	16h	3 months
15℃	90 min	15h	12h
25℃	60 min	10h	10h
40℃	30 min	8h	8h

Data based on standard film thickness applied on tinplate substrate.

Application

Dachin Zinc 081 Epoxy Zinc-Rich Primer can be applied via conventional spray, airless spray, or brush. Cure requires minimum 5℃ substrate temperature (max 40℃). Maintain surface temperature ≥3℃ above dew point with RH <85%.

Ensure clean/dry substrates and proper ventilation in confined spaces. Mix components in specified ratio before use. Use within 4 hours after mixing. Keep tools clean and dry.

Zinc salts (white rust) may form on exposed surfaces. Apply Dachin EP 550 Epoxy MIO Intermediate Coat promptly as sealer to minimize rework. Indoor storage (clean environments): ≤3 months exposure; Outdoor (clean): ≤14 days; Industrial/marine: Minimize exposure time.

Remove zinc salts via sweep blasting or mechanical cleaning before overcoating. Prevent dry spray in high temperatures by proper thinning. Ensure adequate ventilation.

Coating System

Topcoat recommendation: Dachin EP 550 Epoxy MIO Intermediate Coat

Film Thickness

23±3μm (as shop primer) | 60±20μm (as anti-corrosive primer)

Surface Preparation

Steel substrates: Abrasive blast to Sa2.5 (ISO 8501-1:1988) or SSPC SP10. Profile range: Rz 40-75μm. Lower profiles risk adhesion failure; excessive peaks may cause pitting. Alternative: Power tool cleaning to St3 with oil/grease removal.

Mixing

Two-component system (Component A: Base; Component B: Curing Agent). Mechanically stir each component separately before proportioning. Mix thoroughly in correct ratio.

Application Methods

Method	Thinner	Thinning Ratio	Nozzle Size	Pressure
Airless Spray	Dachin Thinner X17	0-10%	0.4-0.5mm	15MPa
Conventional Spray	Dachin Thinner X17	0-10%	2.0-2.5mm	0.3-0.6MPa
Brush/Roller	Dachin Thinner X17	0-3%	-	-

Thinning ratio calculated by weight.