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This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc. Galvanization shall be used to prepare reinforcing bars. The galvanizer shall be permitted to subject the newly coated steel reinforcing bars to air or steam wiping to remove excess zinc from the bars. The mass of zinc coating shall conform to specified requirements. The mass of the coating shall be determined by magnetic thickness gage measurements. Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee the results obtained by magnetic thickness measurements. A retest shall be provided if the average zinc coating mass fails to meet the requirements. The galvanized coating shall be chromate treated.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
1.1 This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc.
1.2 This specification is applicable for orders in either inch-pound units (as Specification A 767) or SI units (as Specification A 767M).
1.3 The values stated in either SI or inch-pound units are to be regarded as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents. Therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
A706/A706M Specification for Low-Alloy Steel Deformed and Plain Bars for Concrete Reinforcement
A780/A780M Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
A996/A996M Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement
B6 Specification for Zinc
B487 Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section
E376 Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) Testing Methods
ACI SpecificationACI301 Specifications for Structural Concrete
ICS Number Code 77.140.15 (Steels for reinforcement of concrete)
UNSPSC Code 30103623(Reinforcing bar or rebar or mesh)