Services
Powder Coating & Industrial Finishes
Professional powder coating for steel, aluminium and galvanised substrates. Interpon and Dulux powder ranges. Wide colour and finish selection. Enquire with Steel Source Australia.
Complete Powder Coating & Finishing Solutions
Steel Source Australia arranges professional powder coating and industrial finishing services for fabricated steel, aluminium and galvanised substrates. Whether you need a single component finished or a full production run, we can coordinate powder coating through our network of accredited applicators using Interpon and Dulux powder ranges.
Powder coating is an electrostatically applied dry finishing process that delivers a durable, uniform, high-quality coating superior to conventional liquid paint. The powder is applied to a pre-treated substrate, then cured in an oven at 180–200°C to form a hard, smooth film that is resistant to chipping, scratching, fading and corrosion.
Powder coating is available in a wide range of colours from the Interpon Living Colours, Interpon Commercial and Dulux Powder ranges — including gloss, semi-gloss, satin, matt, texture and wrinkle finishes. Custom colour matching is available on request.
Powder Ranges
Interpon & Dulux
Finish Types
Gloss, Satin, Matt, Texture
Cure Temperature
180–200°C
Substrates
Steel, Aluminium, Galvanised
Colour Matching
Available on request
Service Area
Australia-wide
Common Applications
Fencing & Gates
Balustrades & Handrails
Structural Steel
Architectural Metalwork
Industrial Equipment
Outdoor Furniture
Available Finish Types
Gloss
85–95 GUHigh-gloss mirror-like finish. Maximum light reflection. Ideal for decorative architectural features, gates, balustrades and furniture.
Semi-Gloss
55–70 GUBalanced sheen with good cleanability. Popular for commercial fencing, handrails, structural steel and general fabrication.
Satin
30–50 GUSoft, smooth sheen. Hides minor surface imperfections. Widely used for architectural metalwork, window frames and cladding.
Matt
5–20 GULow-sheen flat finish. Minimises light reflection. Preferred for industrial equipment, machinery, structural steel and modern architectural applications.
Texture
VariableTextured surface finish — fine, medium or coarse. Excellent for hiding surface defects. Used for heavy industrial equipment, outdoor furniture and architectural panels.
Wrinkle
VariableDistinctive wrinkled surface pattern. Provides excellent grip and hides weld marks and surface irregularities. Common for industrial enclosures and machinery.
Suitable Substrates
Mild steel (hot rolled, cold rolled)
Galvanised steel (duplex coating)
Aluminium (extrusions, sheet, plate)
Stainless steel
Cast iron and cast steel
Zinc-coated substrates
Pre-treated and primed steel
Fabricated structural steel
Interpon Colour Range
Full rangeInterpon Living Colours and Commercial ranges — a selection of representative colours shown below. Full colour cards available on request.
Surfmist®
Shale Grey™
Paperbark®
Classic Cream™
Dune®
Sandbank
Windspray®
Pale Eucalypt®
Ironstone®
Basalt®
Gully®
Monument®
Deep Ocean®
Wilderness®
Cottage Green®
Mangrove®
Jasper®
Pale Eucalypt®
Manor Red®
Terrain®
Headland®
Bushland®
Night Sky®
Satin Black
Gloss Black
Charcoal
Dulux Powder Colour Range
Dulux Powder Colour Selector and Dulux Powder Premium ranges — a selection of representative colours shown below. Full colour cards available on request.
White
Off White
Antique White USA
Silver Grey
Mid Grey
Dark Grey
Charcoal
Black
Satin Black
Gloss Black
Primrose
Safety Yellow
Signal Red
Brick Red
Safety Orange
Royal Blue
Sky Blue
Bottle Green
Leaf Green
Beige
Duplex Coating — Galvanize + Powder Coat
For maximum corrosion protection, Steel Source Australia can arrange duplex coating — hot dip galvanizing followed by powder coating. The zinc galvanised layer provides cathodic protection while the powder coat provides a decorative, UV-resistant barrier. Duplex systems can extend the service life of steel structures by 1.5–2.5× compared to either coating alone.
Duplex coating is ideal for coastal environments, industrial applications, outdoor fencing and gates, balustrades and any steel structure requiring both corrosion resistance and a decorative finish. Refer to AS/NZS 4680 (hot dip galvanizing) and AS/NZS ISO 12944 (corrosion protection of steel structures) for specification guidance.
E-E-A-T Technical Reference
Powder Coating — Technical Specifications & Standards
Powder Coating Process Overview
01
Pre-Treatment
Chemical cleaning, degreasing and phosphating or chromating of the substrate to remove contaminants and promote adhesion. Multi-stage pre-treatment systems are used for aluminium and steel production lines.
02
Powder Application
Electrostatic spray application of dry powder using a corona or tribo-charging gun. The charged powder particles adhere to the earthed substrate, forming a uniform coating layer before curing.
03
Oven Curing
The coated substrate is conveyed through a curing oven at 180–200°C for 10–20 minutes. The powder melts, flows and cross-links to form a hard, durable thermoset film.
04
Quality Inspection
Film thickness measurement (typically 60–100 µm), adhesion testing, gloss measurement and visual inspection. Qualicoat-licensed applicators adhere to strict quality protocols.
Typical Technical Specifications
| Property | Typical Value | Notes |
|---|---|---|
| Film thickness | 60–100 µm | Standard architectural; heavy-duty up to 120 µm |
| Cure temperature | 180–200°C | Oven cure; 10–20 minutes at temperature |
| Gloss range | 5–95 GU (60°) | Matt to high gloss; measured per AS/NZS 1580.602.2 |
| Adhesion | Class 0 (AS 1580.408.4) | Cross-cut adhesion test; no detachment |
| Impact resistance | ≥ 80 kg·cm | Direct and reverse impact; AS 1580.406.1 |
| Salt spray resistance | ≥ 1,000 hours | Qualicoat Class 1; AS/NZS ISO 9227 |
| UV resistance | Class 1–3 (Qualicoat) | Interpon D2020 / D3020 for high UV environments |
| Hardness | H–2H (pencil hardness) | AS 1580.405.1 |
| Flexibility | Pass 3 mm mandrel bend | AS 1580.406.2 |
| Chemical resistance | Resistant to common chemicals | Refer to product data sheet for specific resistance |
Powder Coating
Dry electrostatic finishing process
Powder coating is a dry finishing process where electrostatically charged powder particles are sprayed onto a grounded substrate and then cured in an oven. The result is a uniform, durable thermoset film that is harder, more flexible and more corrosion-resistant than conventional liquid paint. No solvents are used — powder coating is an environmentally friendly process with near-zero VOC emissions.
Interpon
AkzoNobel powder coating brand
Interpon is a leading global powder coating brand manufactured by AkzoNobel. The Interpon range includes Living Colours (architectural), Commercial (general purpose), D2020 (high durability) and D3020 Fluoromax (ultra-high durability with PVDF-like performance). Interpon products are widely specified for architectural aluminium, fencing, balustrades and structural steel.
Dulux Powder
Dulux powder coating range
Dulux Powder is a comprehensive powder coating range from Dulux (PPG). The range includes standard and premium colour selectors covering gloss, semi-gloss, satin, matt and texture finishes. Dulux Powder products are widely used in Australian industrial, commercial and architectural applications.
Qualicoat
International quality certification
Qualicoat is an international quality certification for powder coating and liquid painting of aluminium and its alloys. Qualicoat-licensed applicators must meet strict requirements for pre-treatment, powder quality, film thickness, adhesion, corrosion resistance and UV resistance. Qualicoat Class 1 is standard; Class 2 and Class 3 are for higher durability requirements.
Duplex Coating
Galvanize + powder coat system
A duplex coating system combines hot dip galvanizing with powder coating. The zinc galvanised layer provides cathodic protection against corrosion while the powder coat provides a decorative, UV-resistant barrier. Duplex systems are specified to AS/NZS ISO 12944 and can extend the service life of steel structures by 1.5–2.5× compared to either coating alone.
Pre-Treatment
Surface preparation before coating
Pre-treatment is the critical surface preparation step before powder application. It involves chemical cleaning, degreasing and conversion coating (phosphating for steel; chromating or non-chrome conversion for aluminium). Proper pre-treatment ensures adhesion, corrosion resistance and long-term coating performance. Multi-stage pre-treatment systems are used for production-line coating.
Applicable Standards
AS/NZS 4506
Thermosetting Powder Coatings
Australian/New Zealand standard for thermosetting powder coatings. Specifies requirements for powder coating materials, film properties, adhesion, flexibility, impact resistance, gloss and corrosion resistance.
AS/NZS ISO 12944
Corrosion Protection of Steel Structures
Specifies corrosion protection systems for steel structures including duplex coating systems (galvanize + powder coat). Defines corrosivity categories (C1–CX) and specifies coating systems for each environment.
AS/NZS 4680
Hot Dip Galvanised Coatings
Specifies requirements for hot dip galvanised coatings on fabricated ferrous articles. Relevant to duplex coating systems where galvanizing is the first coat.
Qualicoat Class 1/2/3
International Quality Certification
Qualicoat certification for powder coating applicators. Class 1 is standard; Class 2 requires enhanced UV resistance; Class 3 (Seaside) is for severe coastal environments. Qualicoat-licensed applicators must pass regular audits and testing.
AS 1580.408.4
Cross-Cut Adhesion Test
Australian standard for adhesion testing of paint and related products by cross-cut. Class 0 (no detachment) is required for architectural powder coating applications.
AS/NZS ISO 9227
Salt Spray (Fog) Testing
Specifies the salt spray test for evaluating corrosion resistance of coatings. Qualicoat Class 1 requires ≥1,000 hours salt spray resistance with no more than 1mm creep from scribe.
Pick Up & Drop Off Locations
Steel Source Australia works with a national network of industrial processing hubs for pick up and drop off of steel components for powder coating and finishing. Find your nearest facility below.
Pick Up & Drop Off Locator
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Interpon & Dulux ranges. Steel, aluminium and galvanised substrates. Australia-wide.