Why Galvanising Demand Decides the Zinc Market’s Next Move

Zinc’s biggest customer is a coating, not a mine or a smelter, and that coating lives or dies with construction. Galvanising demand absorbs more zinc than any other use, which is why small shifts in building activity can flip the whole market.

Consider 2025. In April that year, the International Lead and Zinc Study Group (ILZSG) forecast a refined surplus of about 93,000 t. Its preliminary data, published in February 2026, showed an actual deficit of 33,000 t instead.

Galvanised steel takes roughly 55% of refined zinc, according to Reuters columnist Andy Home in April 2025. Against ILZSG’s 13.86 Mt of global demand in 2025, that implies about 7.6 Mt going into galvanising. Other sources report lower shares, so treat the figure as a range rather than a fixed number.

You will come away knowing how galvanising works, where the demand actually originates, and how to read construction cycles as an early signal for zinc.

What galvanising does and why it dominates zinc use

Steel rusts. Leave a bare beam in the rain and iron oxide starts eating it, weakening the structure over years.

Zinc solves this in two ways. First, it acts as a barrier that keeps moisture and oxygen away from the steel. Second, zinc corrodes before steel does, so if the coating gets scratched, the zinc sacrifices itself to protect the exposed metal underneath. That sacrificial protection is what made zinc the default choice for steel left out in the weather.

Hot-dip versus electrogalvanising

The two main methods suit different jobs:

• Hot-dip galvanising: Fabricated steel is dipped into molten zinc, leaving a thick, durable coating. It is typically used on structural steel, beams, poles, guardrails and towers.
• Electrogalvanising: Zinc is applied with an electric current, producing a thinner, smoother finish. It is typically used on sheet steel for car bodies and appliance housings.

Both routes lead back to the same driver: wherever steel faces weather, it needs protection.

Beyond dipping and electroplating, you will find that zinc coating methods also include thermal spraying, which lets engineers protect large or already-installed steel structures that cannot be lowered into a galvanising bath.

How big is the galvanising share, really?

Key statistic Andy Home, writing for Reuters on 28 April 2025, noted that 55% of global zinc demand comes as galvanised steel for construction.

Not every source agrees. A 2026 Axiobench statistics article put galvanising at about 17% of zinc demand in 2024. The gap most likely comes from differences in scope, such as refined versus total zinc, geographic coverage and how sectors are defined. ILZSG and International Zinc Association commentary consistently places galvanising in a 50-60% range, and ILZSG is the official study group, so the higher figure carries more weight.

The lesson for you is simple. When more than half a metal’s demand sits in one process, the health of steel-using industries becomes the health of the zinc market, and any forecast you read should state which share definition it uses.

Where galvanised steel ends up: construction, autos and infrastructure

Once you know galvanising dominates, the next question is which steel users matter most. Construction sits at the top, and that ranking explains why strong car sales cannot rescue zinc on their own.

Bridges, transmission lines, rail and water systems are generally viewed as structural demand, tied to long-term urbanisation and maintenance. Residential and commercial building is the swing factor, rising and falling with rates and property confidence.

The China illustration

China shows what happens when the cyclical part weakens. ILZSG reported higher output of galvanised sheet, passenger cars and appliances in early 2024, and Chinese vehicle production rose 11.4% in H1 2025. Yet real-estate investment stayed depressed through both periods.

The outcome showed up in ILZSG data presented by João Jorge in April 2026: galvanising-sector zinc usage grew 1.8% in 2024 and just 0.5% in 2025.

That tells you a healthy auto sector is not enough to lift zinc. Watch construction data first.

Regional demand: China slows, India climbs, the US and Europe hold

China is the giant, and its slowdown sets the tone. In October 2025, ILZSG forecast Chinese zinc demand growth of 1.3% for 2025 and only 0.1% for 2026.

Look outward, though, and the picture shifts. Global refined demand rose 1.9% to 13.86 Mt in 2025, according to ILZSG preliminary data reported by Mining.com, with higher consumption in China, India, the US, Saudi Arabia, Thailand and Europe offsetting declines in Brazil, South Korea, Peru and South Africa.

The forecasts kept moving as the year unfolded:

• September 2024: 2025 demand forecast at 14.04 Mt
• October 2025: revised to 13.71 Mt
• February 2026: preliminary actual of 13.86 Mt

Demand turned out broader and firmer than forecasters expected mid-year. No public percentages exist for India, the US or Europe, so the comparison below is directional only.

ILZSG had also expected rising demand in India, Japan, Saudi Arabia, Thailand and Vietnam in 2025. Europe is the paradox: high energy costs can soften steel demand while also threatening energy-intensive smelters, potentially tightening regional supply.

For you, the point is that a single global number can hide a very uneven picture. Upside surprises are likelier to come from outside China; downside risk still sits largely within it.

Demand outside the big three regions is also worth tracking, since African infrastructure corrosion challenges in humid and coastal climates make galvanised steel a practical necessity for new power, transport and water projects.

Infrastructure spending and construction cycles: how they reach the zinc price

Spending headlines arrive long before zinc demand does. The chain runs like this:

1. Approval: Funding is authorised and allocated.
2. Design and tender: Projects are engineered and put out to bid.
3. Award: Contracts are signed.
4. Galvaniser orders: Steel mills and galvanisers receive firm orders.
5. Zinc demand and price: Consumption rises and feeds into the market balance.

Each step takes time, and the total lag runs from several months to more than a year.

IIJA and the US pipeline

The US Infrastructure Investment and Jobs Act (IIJA) totals about US$1.2 trillion, including roughly US$550 billion of new federal spending. A Cleveland Fed brief from September 2024, citing Brookings, estimated total spending of about US$864 billion over FY2022-2026, a broader scope than the new-spending figure. By June 2024, more than US$461 billion had been announced or obligated, about 53.3% of that estimate.

Obligated is not spent. A Congressional Research Service report from April 2026 put obligated but unspent highway contract authority at about US$96 billion at the end of FY2025, a backlog likely to feed galvanised guardrail and sign-structure orders for years. No public source quantifies the zinc tonnage involved.

India’s infrastructure push

India’s National Infrastructure Pipeline and its successor, PM Gati Shakti, continue advancing projects. Updated galvanising demand estimates were not found in public releases, so treat India as a directional growth story.

Why supply cannot react quickly

Mines and smelters adjust slowly. ILZSG expected world mine production to rise 4.6% in 2025, driven by 5% growth outside China, and Reuters reported Chinese smelters lifted concentrate imports 37% year-on-year in Q1 2025.

Andy Home described construction as weak “everywhere, not least in China” as funds turned increasingly bearish on zinc.

When construction slumps while supply keeps climbing, surpluses widen and prices sag. LME cash zinc sat around US$3,840 per tonne as of 9 October 2026, after the market moved from a 69,000 t deficit in 2024 to 33,000 t in 2025. Substitution from organic coatings, stainless steel or aluminium-zinc alloys adds a further, unquantified, long-term risk.

Spending announcements are an early signal, not a price trigger. Zinc can stay soft even while funding headlines look strong.

Past performance does not guarantee future results. Financial projections are subject to market conditions and various risk factors.

Why zinc’s next move depends on steel, not mines

Galvanising is the base layer of zinc demand, and construction timing is the signal that moves it. The 2025 balance shows how thin the margin is: a 33,000 t deficit, galvanising growth of just 0.5%, and an ILZSG forecast from October 2025 of 1.0% demand growth to 13.86 Mt in 2026.

A balance that small can tip either way. Your watchlist:

• Chinese real-estate investment: the largest swing factor for galvanised construction steel
• US obligations turning into construction: the drawdown of the US$96 billion highway backlog
• Indian demand growth: the most likely source of upside surprise
• Supply additions: mine output and Chinese concentrate imports
• Share definitions: check whether a source uses 55% or a narrower measure

Keep watching the gap between money approved and steel ordered. That lag, more than any headline, tells you when galvanising demand will actually reach the zinc price.

Because galvanising ties zinc to steel and construction, your choice of zinc stock exposure matters: miners carry the most price leverage, while diversified producers dilute it.

These statements are speculative and subject to change based on market developments.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions.