Why Hot-Dip Galvanising Lasts Longer
ENSOL Engineering TeamPublished 2026-02-07Updated 2026-02-171 min read
Hot-dip galvanising outlasts thinner coatings for three connected reasons: coating thickness, complete coverage, and the way zinc protects steel sacrificially.
Thickness buys time
Zinc corrodes slowly and predictably. A thicker coating simply has more zinc to consume before the steel is at risk, so life scales with coating mass.
Edge-to-edge coverage
Dipping the finished part coats edges, holes and welds that in-line coatings leave bare — removing the weak points where corrosion usually starts.
Sacrificial protection
Even at a scratch, surrounding zinc corrodes in preference to the exposed steel, protecting it until the local zinc is consumed.