Dachin ZS 310
Alcohol soluble inorganic zinc rich coating

Main Components

Two-component system: Component A consists of alkyl silicate, ultrafine zinc dust, anti-corrosive pigments and additives; Component B serves as the base material.

Key Features

• Zinc dust provides cathodic protection with superior anti-corrosion performance.
• Rapid-drying film enables material handling, stacking, and topcoat application shortly after coating.
• Excellent weldability and cutting performance.
• Withstands temperatures up to 400°C with minimal burn-off during welding/cutting.
• Compatible with most coating systems.

Primary Applications

Used as shop primer in steel pretreatment lines for shipyards and heavy machinery plants. Also suitable for offshore platforms, dock steel columns, bridges, and large steel structures requiring corrosion protection.

Technical Specifications

Film Color & Appearance	Gray, matte
Non-volatile content by volume, %	≥35
Density, kg/L	2±0.1
Viscosity (Ford Cup #4), s	≥15

Packaging

	Net Weight / kg	Volume / L
A	22.5	9
B	7.5	6
Total	30	15

Basic Parameters

Mixing Ratio	By Weight: A︰B = 3︰1 By Volume: A︰B = 1.5︰1
Pot Life	10h at 5℃ | 9h at 15℃ | 8h at 25℃
Theoretical Coverage	Approx. 17.5㎡/L at 20μm DFT

Recoat Intervals

Temperature	Surface Dry	Hard Dry	Recommended Overcoating Interval
			Minimum	Maximum
5℃	20 min	4h	12h	Unlimited
15℃	10 min	2h	12h
25℃	5 min	1h	12h
40℃	5 min	0.5h	12h

Data based on standard film thickness applied on tinplate substrate.

Application

Gradually add Component B to Component A while stirring to achieve homogeneous mixture. Maintain continuous agitation during application to prevent zinc settlement. Apply at 2-50℃ with 50-95% RH. Humidify environment if RH is too low. Seal coat with epoxy mica iron oxide paint to prevent pitting corrosion.

Ensure complete curing of inorganic zinc-rich primer before topcoating. Exercise caution when opening pressurized zinc paste containers - vent gas gradually via small pinhole to prevent accidents.

Coating Compatibility

Topcoat recommendation: Dachin EP 550 Epoxy MIO Intermediate Coat. Incompatible with alkyd/polyester coatings.

Surface Preparation

Steel substrates: Remove contaminants via abrasive blasting to Sa2.5 (ISO 8501-1) with controlled roughness. Power tool cleaning to St3 for weld areas.

Mixing

Two-component system (Component A: Base; Component B: Curing Agent). Mechanically stir Component A first, then gradually incorporate Component B in specified ratio using power mixer.

Application Methods

Method	Thinner	Thinning Ratio	Nozzle Size	Pressure
Airless Spray	Dachin Thinner X17	0-10%	0.4-0.5mm	20-25MPa
Conventional Spray	Dachin Thinner X17	0-10%	2.0-2.5mm	0.3-0.4MPa
Brush/Roller	Dachin Thinner X17	0-5%	-	-

Avoid dry spray. Thinning ratio calculated by weight.