Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of astm a780 d6386 d7803 e376 galvanized steel in China. Welcome to wholesale customized astm a780 d6386 d7803 e376 galvanized steel at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.
ASTM A780
Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings, covers appropriate methods used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other hot-dip galvanized products, including uncoated areas remaining after initial hot-dip galvanizing. Requirements concerning the renovation of uncoated areas after initial hot-dip galvanizing are contained within the material specifications (A123, A153, A767). The specification outlines three acceptable forms of touch-up: zinc-based solders, zinc-rich paints, and metallizing, as well as the required coating thickness of the repair.
ASTM D6386
Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Painting. See Specifying Duplex Systems for more information.
ASTM D7803
Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Powder Coating. See Specifying Duplex Systems for more information.
ASTM E376
Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) Examination Methods. Eddy-current-type thickness measurement is a non-destructive test measuring variations in the impedance of an eddy-current inducing coil caused by coating thickness variations. They can only be used if the electrical conductivity of the coating differs significantly from that of the substrate.
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