This test method provides a standard method for determining the weight [mass] of coating for comparison with specification requirements. A coating of zinc on iron or steel articles provides protection against corrosion. As the protection is provided by sacrificial loss of zinc, the degree of protection is proportional to the weight [mass] of zinc coating. Specifications for zinc-coated articles frequently provide for different classes of coating so that the purchaser can select the coating weight [mass] most suitable to his or her needs.
KeywordsASTM A90 - Bars and Rods - Hot-Dip Galvanizing - Hot-Dip Process - Sheet, Strips, and Coils - Steel Sheets - Steel Wires - Wires, Wire Strands, and Wire Ropes - Zinc Alloy-Coated Steel Products - Zinc Coated - Zinc-Coated Steel Sheets - Zinc-Coated Steel Wires
ICS CODE25.220.40 (Metallic coatings)
UNSPSC CODE30264000 (Carbon steel sheets); 31152206 (Coated steel wire)
ASTM A90 / A90M-13(2018), Standard Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings, ASTM International, West Conshohocken, PA, 2018, www.astm.org