ASTM A1055/A1055M-22

Standard Specification for Zinc and Epoxy Dual-Coated Steel Reinforcing Bars

ABSTRACT
This specification covers deformed and plain steel reinforcing bars with a dual coating of zinc alloy and an epoxy coating. The zinc alloy layer shall be applied by the thermal spray coating method followed by an epoxy coating, which shall be applied by the electrostatic spray method. The zinc coating shall conform to the required chemical composition for aluminum, cadmium, copper, iron, lead, tin, antimony, silver, bismuth, arsenic, nickel, magnesium, titanium, and zinc. The coated steel reinforcing bars shall conform to bend test requirements and to physical properties such as coating thickness, coating continuity, epoxy coating flexibility, and coating adhesion.
SCOPE
1.1 This specification covers deformed and plain steel reinforcing bars with a dual coating of zinc-alloy followed by an epoxy coating applied by the electrostatic spray method.  
1.2 The zinc-alloy coating is produced as one of two types: zinc-alloy applied by the thermal spray method (Type I) or zinc-alloy applied in accordance with Specification A1094/A1094M (Type II).
Note 1: The coating applicator is identified throughout this specification as the manufacturer.  
1.3 Requirements for the zinc coating are contained in Table 1.  
1.4 Requirements for epoxy powder coatings are contained in Annex A1.  
1.5 Guidelines for construction practices at the job-site are presented in Appendix X1.  
1.6 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
1.7 This specification is applicable for orders in either inch-pound units [as Specification A1055] or SI units [as Specification A1055M].  
1.8 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, except as specifically noted in Table 2. Combining values from the two systems may result in non-conformance with this specification.  
1.9 This specification does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this specification to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.10 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Aug-2022
• ICS: 25.220.40 - Metallic coatings
• ICS: 25.220.60 - Organic coatings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.05 - Steel Reinforcement

Relations

• Refers: ASTM B833-20 - Standard Specification for Zinc and Zinc Alloy Wire for Thermal Spraying (Metallizing) for the Corrosion Protection of Steel
• Effective Date: 01-Apr-2020

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:A1055/A1055M −22
Standard Specification for
1
Zinc and Epoxy Dual-Coated Steel Reinforcing Bars
This standard is issued under the fixed designation A1055/A1055M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* appropriate safety, health, and environmental practices and
determine the applicability of regulatory limitations prior to
1.1 This specification covers deformed and plain steel
use.
reinforcing bars with a dual coating of zinc-alloy followed by
1.10 This international standard was developed in accor-
an epoxy coating applied by the electrostatic spray method.
dance with internationally recognized principles on standard-
1.2 The zinc-alloy coating is produced as one of two types: ization established in the Decision on Principles for the
zinc-alloy applied by the thermal spray method (Type I) or
Development of International Standards, Guides and Recom-
zinc-alloy applied in accordance with Specification A1094/ mendations issued by the World Trade Organization Technical
A1094M (Type II).
Barriers to Trade (TBT) Committee.
NOTE 1—The coating applicator is identified throughout this specifica-
tion as the manufacturer. 2. Referenced Documents
2
2.1 ASTM Standards:
1.3 RequirementsforthezinccoatingarecontainedinTable
1. A615/A615MSpecificationforDeformedandPlainCarbon-
Steel Bars for Concrete Reinforcement
1.4 Requirements for epoxy powder coatings are contained
A706/A706MSpecification for Deformed and Plain Low-
in Annex A1.
Alloy Steel Bars for Concrete Reinforcement
1.5 Guidelines for construction practices at the job-site are A775/A775MSpecification for Epoxy-Coated Steel Rein-
presented in Appendix X1. forcing Bars
A944Test Method for Comparing Bond Strength of Steel
1.6 The text of this specification references notes and
Reinforcing Bars to Concrete Using Beam-End Speci-
footnoteswhichprovideexplanatorymaterial.Thesenotesand
mens
footnotes (excluding those in tables and figures) shall not be
A996/A996MSpecification for Rail-Steel and Axle-Steel
considered as requirements of the specification.
Deformed Bars for Concrete Reinforcement
1.7 This specification is applicable for orders in either A1035/A1035M Specification for Deformed and Plain,
inch-pound units [as Specification A1055] or SI units [as
Low-Carbon, Chromium, Steel Bars for Concrete Rein-
Specification A1055M]. forcement
A1094/A1094MSpecification for Continuous Hot-Dip Gal-
1.8 The values stated in either inch-pound units or SI units
vanized Steel Bars for Concrete Reinforcement
are to be regarded as standard. Within the text, the SI units are
B117Practice for Operating Salt Spray (Fog) Apparatus
showninbrackets.Thevaluesstatedineachsystemmaynotbe
B833Specification for Zinc and Zinc Alloy Wire for Ther-
exact equivalents; therefore, each system must be used inde-
malSpraying(Metallizing)fortheCorrosionProtectionof
pendently of the other, except as specifically noted in Table 2.
Steel
Combining values from the two systems may result in non-
D4060Test Method for Abrasion Resistance of Organic
conformance with this specification.
Coatings by the Taber Abraser
1.9 This specification does not purport to address all of the
D4417Test Methods for Field Measurement of Surface
safety concerns, if any, associated with its use. It is the
Profile of Blast Cleaned Steel
responsibility of the user of this specification to establish
E29Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
E527Practice for Numbering Metals and Alloys in the
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
2
A01.05 on Steel Reinforcement. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2022. Published November 2022. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2008. Last previous edition approved in 2016 as A1055/A1055M–16. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A1055_A1055M-22. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A1055/A1055M−22
TABLE 1 Chemical Composition Requirements for Zinc and Z
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A1055/A1055M − 16 A1055/A1055M − 22
Standard Specification for
1
Zinc and Epoxy Dual-Coated Steel Reinforcing Bars
This standard is issued under the fixed designation A1055/A1055M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers deformed and plain steel reinforcing bars with a dual coating of zinc-alloy followed by an epoxy
coating applied by the electrostatic spray method.
1.2 The zinc-alloy coating is produced as one of two types: zinc-alloy applied by the thermal spray method (Type I) or zinc-alloy
applied in accordance with Specification A1094/A1094M (Type II).
NOTE 1—The coating applicator is identified throughout this specification as the manufacturer.
1.3 Requirements for the zinc coating are contained in Table 1.
1.4 Requirements for epoxy powder coatings are contained in Annex A1.
1.5 Guidelines for construction practices at the job-site are presented in Appendix X1.
1.6 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the specification.
1.7 This specification is applicable for orders in either inch-pound units [as Specification A1055] or SI units [as Specification
A1055M].
1.8 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown
in brackets. The values stated in each system may not be exact equivalents; therefore, each system must be used independently
of the other, except as specifically noted in Table 2. Combining values from the two systems may result in non-conformance with
this specification.
1.9 This specification does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this specification to establish appropriate safety, health, and environmental practices and determine the applicability
of regulatory limitations prior to use.
1.10 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.05
on Steel Reinforcement.
Current edition approved Dec. 1, 2016Sept. 1, 2022. Published March 2017November 2022. Originally approved in 2008. Last previous edition approved in 20102016
ε1
as A1055 – 10A1055/A1055M – 16. . DOI: 10.1520/A1055_A1055M-16.10.1520/A1055_A1055M-22.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A1055/A1055M − 22
TABLE 1 Chemical Composition Requirements for Zinc and Zinc-Alloy Wires
Al,
Common
max Cd, Cu, Fe, Pb, Sn, Sb, Ag, Bi, As, Ni, Mg, Mo, Ti, Zn, Other,
Name
unless max max max max max max max max max max max max max min Total max
A
(UNS)
noted
B
99.99 Zinc
C D
0.002 0.003 0.005 0.003 0.003 0.001 { { { { { { { { 99.99 {
(Z13005)
B
99.99 Zinc 0.10 total
0.01 0.02 0.02 0.02 0.03 { { { { { { { { { 99.9
(Z15005)
non-Zn
99.995 Zinc
0.001 0.003 0.001 0.002 0.003 0.003 { { { { { { { { 99.995 0.005
E
({)
99.95 Zinc
0.01 0.02 0.001 0.02 0.03 0.001 { { { { { { { { 99.95 0.050
({)
99.95 Zinc
0.01 0.005 0.7 0.01 0.005 0.001 { { { { { 0.01 0.01 0.18 99 1.0
({)
98Zn/2Al
1.5-2.5 0.005 0.005 0.02 0.005 0.003 0.10 0.015 0.02 0.002 0.005 0.02 { { remainder {
(Z30402)
A
UNS designations were established in accordance with Practice E527.
B
In accordance with ANSI/AWS A5.33.
C
The following applies to all specified limits in this table. For the purposes of determining conformance with this specification, an observed value obtained from analysis
shall be rounded off to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding method of Practice E29.
D
{ indicates that the element is not applicable.
E
...