Hot‑Dip Galvanizing — ISO 1461:2022 Standard

Hot‑dip galvanizing is a proven, long‑term corrosion‑protection system for steel, defined by ISO 1461:2022 – Hot‑dip galvanized coatings on iron and steel articles: Specifications and test methods. The standard covers every stage of the process, from cleaning and pre‑treatment through to full immersion in molten zinc, ensuring a consistently bonded, high‑performance coating.

Technical Applicator Requirements

The following conditions are essential for hot‑dip galvanizing to be applied effectively and efficiently — all of which are met across the products we supply:

• Galvanizing must be carried out in accordance with ISO 1461:2022.
• A robust quality management system audited annually to BS EN ISO 1461:2022 (or equivalent) must be in place.
• Full component traceability must be maintained throughout the process.
• Post‑galvanizing inspection must confirm minimum coating thickness and address any surface defects, including the repair of allowable bare patches using ISO 1461:2022 procedures.
• Materials must be suitably packaged prior to despatch to prevent transit damage.
• The galvanizer should be a member of the Galvanizers Association, ensuring access to independent technical guidance for specifiers.

Onsite Handling & Protection

• Handle and install galvanized steel carefully to avoid impact damage.
• Protect materials stored on site from contamination or abrasion.
• Avoid white rust by ensuring stacked galvanized items are separated with spacers or stored indoors if kept for more than three weeks.
• Covering galvanized steel can increase sweating, raising the risk of white rust formation.

Hot‑Dip Galvanizing Attributes

• Coating applied to all surfaces — internal and external.
• Superior corrosion protection for exposed or external steel.
• Non‑permeable, abrasion‑resistant coating with alloy layers harder than steel.
• Sacrificial (cathodic) protection built into the coating.
• Exceptional edge protection compared to paint systems.
• Factory‑controlled process delivering a repeatable, high‑quality finish.
• On‑site welding compatible, with repairs carried out using ISO 1461:2022‑approved methods.