The basic specifications for zinc coating is determined by a single standard – BDS EN ISO 1461 “Hot dip galvanizing on iron and steel products – Specifications and test methods”. When the details or constructions are made of one type of steel, the obtained zinc coating is of the same thickness. The coating thickness depends on both the composition and the thickness of the steel.
Minimum coating thickness of non-centrifuged samples:
|Product and its thickness||Local coating thickness (minimum) μm||Average coating thickness (minimum) μm|
|Steel > 6 мм||505||70||610||85|
|Steel > 3 мм < 6 мм||395||55||505||70|
|Steel > 1,5 мм < 3 мм||325||45||395||55|
|Steel < 1,5 мм||250||35||325||45|
|Cast iron> 6 мм||505||70||575||80|
|Cast iron< 6 мм||430||60||505||70|
For ease of calculation: The relative weight of zinc is 7.133 g/cm³ (at 200 ° C) assuming it is 7.2 g/cm³. To obtain a layer of 1 μm over 1 sq. m., 7.2 grams of zinc are needed.
Zinc coatings are primarily used as protective coatings, not as a decorative element! They must meet the technical requirements of BDS EN ISO 1461: