A number of different methods of applying zinc coatings to steel are commercially available, each of which has unique characteristics. Often all of these coatings are incorrectly labeled galvanising, but it is important to understand the differences.
The products produced by each of these processes have different uses depending on their applicability, relative economics and expected service life. To protect structural parts from corrosion, all parts shall be hot dip galvanised after machining. The zinc coat must be cohesive, as even as possible and free of features impairing the usability of hot dip galvanised structural parts. For average layer thickness of the parts, the following average and minimum values following EN ISO 1461 shall apply. The minimum layer thickness for bolts and nuts at respective measuring points shall be 40 mm pursuant to EN ISO 10684.