Work out galvanising weight instantly with clear inputs, formula shown and shareable results.
Zinc has a density of 7.14 g/cm³, so a coating one micron thick weighs 7.14 grams per square metre. Multiplying by area gives the zinc actually deposited, and a wastage allowance covers dross, ash and drainage losses in the kettle. An 85 micron coating, about 610 g/m², is the common requirement for structural steelwork.
Coating mass
g/m² = thickness µm x 7.14
Zinc consumption
kg = g/m² x area / 1000 x (1 + wastage)
g/m² = thickness µm x 7.14. Zinc has a density of 7.14 g/cm³, so a coating one micron thick weighs 7.14 grams per square metre.
Yes, close to it. Zinc corrodes at a broadly steady rate for a given atmosphere, so life to first maintenance scales almost linearly with coating thickness.
This calculator takes 3 inputs: Surface area to galvanise, Coating thickness, Zinc wastage allowance. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.