Galvanizing

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Galvanizing Services 

The gold-standard in durable, long lasting corrosion protection for steel

Hot dip galvanizing is a proven, low-maintenance, and universally trusted solution that significantly extends the service life of steel. It works by immersion in molten zinc, forming a tough alloy coating that shields the steel from corrosion. This process delivers the complete coverage of surfaces, edges and internal sections, providing long-term durability and reliable performance in demanding environments so you can be confident in what you’re building.

What We Offer

The known experts in Hot Dip Galvanizing

J. Furphy & Sons Group has forged a reputation as the experts in hot dip galvanizing. Decades of industry experience, modern and impressively capable processing facilities, and a highly skilled technical team with a strong customer focus are what set us apart. With multiple sites across regional Australia, our teams work with reliable precision to produce consistent, high-quality coatings to AS/NZS standards, supporting projects from small components to large structural steel. Our combination of capabilities in fabrication, surface preparation, and finishing, mean you’ll have access to a complete steel protection solution from a single trusted provider of choice. 
Full internal and external coating coverage 
Long-lasting corrosion protection 
Low lifetime maintenance 
Suitable for a wide range of steel products 

Industries

Who we work with

We work with builders, steel fabricators, engineers and infrastructure contractors, supporting residential, commercial and major infrastructure projects across Australia with certified steel protection solutions you can confidently rely on. 

Transport & Logistics

Energy & Utilities

Construction

Infrastructure & Government

Manufacturing & Industrial

Dairy & Food Processing

Agriculture & Rural

Recent Projects 

A snapshot of our recent work across Australia 

Our step-by-step process

1

Degreasing: Steel is cleaned in alkaline or acidic baths to remove oils, grease, and surface contaminants that would prevent proper coating adhesion.

2

Rinsing: A thorough water rinse removes all chemical residues from the degreasing bath, preventing contamination of the next treatment stage.

3

Pickling: Steel is submerged in hydrochloric acid to strip rust, mill scale, and oxide layers, leaving a chemically clean metal surface.

4

Second rinse : Another rinse removes all traces of acid from pickling, preventing interference with the fluxing process that follows.

5

Fluxing: Steel is coated in zinc ammonium chloride flux, which prevents re-oxidation of the clean surface before it enters the molten zinc bath.

6

Drying: The fluxed steel is dried in a pre-heat oven to remove all moisture, preventing dangerous steam explosions when the steel contacts molten zinc.

7

Hot dip galvanizing: Steel is fully immersed in molten zinc at around 450 °C, forming a metallurgically bonded zinc-iron alloy coating across the entire surface.

8

Inspection and finishing: Coating thickness is measured, excess zinc is removed, and the surface is inspected for quality before the finished steel is shipped and ready for your project.

Resources

Access the specifications, guides, and practical advice you need to help you scope, plan, and deliver your project. 

Frequently Asked Questions - Galvanizing

Galvanizing is the process of applying a protective zinc coating to steel or iron to prevent rusting. The most common method is hot dip galvanizing, where the steel is submerged in a bath of molten zinc at around 450 °C.

Zinc is highly effective because it corrodes much more slowly than steel and acts as a sacrificial barrier, meaning it corrodes preferentially, protecting the steel underneath even if the coating is scratched or damaged.

In most environments, a hot dip galvanized coating can last 50 years or more with no maintenance. In more corrosive environments, such as coastal or industrial areas, lifespan may be 20–30 years. Longevity depends on coating thickness and environmental conditions.

Most carbon steels and low-alloy steels are suitable for galvanizing. The steel’s silicon and phosphorus content can affect the final coating appearance and thickness, but the protective performance remains effective.

Hot dip galvanizing produces a thicker, more durable coating by immersing steel in molten zinc, creating a metallurgical bond. Electroplating deposits a much thinner zinc layer using an electrical current and is better suited to smaller, precision components.

Yes, but the zinc coating in the weld area will burn off during the process, exposing bare steel. Those areas should be treated with a zinc-rich primer or cold galvanizing compound after welding to restore corrosion protection.

No. The galvanizing process does not alter the structural or mechanical properties of the steel. The zinc coating is applied to the surface only and does not affect load-bearing capacity.

Yes. Galvanized steel can be painted for additional protection or for aesthetic reasons. The surface must be properly prepared (cleaned and primed with a suitable etch primer) to ensure good paint adhesion.

Galvanizing is considered a sustainable process. Zinc is a naturally occurring metal, the coating is fully recyclable, and the long service life of galvanized steel reduces the need for replacement and maintenance, lowering overall environmental impact.

Galvanized steel is used across a wide range of industries including construction, infrastructure, agriculture, automotive, utilities, and manufacturing. Common applications include structural beams, fencing, guardrails, pipes, and transmission towers.

Ready to move a project forward?

Talk to our team about your galvanizing needs.