ASTM B842-23

Standard Specification for Electrodeposited Coatings of Zinc Iron Alloy Deposits

SCOPE
1.1 This specification covers the requirements for electrodeposited zinc iron alloy coatings on metals.  
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 The following precautionary caveat pertains to the test method portion only, Section 8, of this specification:  This standard 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 standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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: 30-Apr-2023
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.06 - Soft Metals

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: B842 − 23
Standard Specification for
1
Electrodeposited Coatings of Zinc Iron Alloy Deposits
This standard is issued under the fixed designation B842; 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* B499 Test Method for Measurement of Coating Thicknesses
by the Magnetic Method: Nonmagnetic Coatings on
1.1 This specification covers the requirements for electrode-
Magnetic Basis Metals
posited zinc iron alloy coatings on metals.
B504 Test Method for Measurement of Thickness of Metal-
1.2 Units—The values stated in SI units are to be regarded
lic Coatings by the Coulometric Method
as standard. No other units of measurement are included in this
B568 Test Method for Measurement of Coating Thickness
standard.
by X-Ray Spectrometry
1.3 The following precautionary caveat pertains to the test B571 Practice for Qualitative Adhesion Testing of Metallic
method portion only, Section 8, of this specification: This
Coatings
standard does not purport to address all of the safety concerns, B602 Guide for Attribute Sampling of Metallic and Inor-
if any, associated with its use. It is the responsibility of the user
ganic Coatings
of this standard to establish appropriate safety, health, and B697 Guide for Selection of Sampling Plans for Inspection
environmental practices and determine the applicability of
of Electrodeposited Metallic and Inorganic Coatings
regulatory limitations prior to use. B762 Guide of Variables Sampling of Metallic and Inorganic
1.4 This international standard was developed in accor-
Coatings
dance with internationally recognized principles on standard- B849 Specification for Pre-Treatments of Iron or Steel for
ization established in the Decision on Principles for the
Reducing Risk of Hydrogen Embrittlement
Development of International Standards, Guides and Recom- B850 Guide for Post-Coating Treatments of Steel for Reduc-
mendations issued by the World Trade Organization Technical
ing the Risk of Hydrogen Embrittlement
Barriers to Trade (TBT) Committee. D3951 Practice for Commercial Packaging
2. Referenced Documents
3. Terminology
2
2.1 ASTM Standards:
3.1 Definitions—Many terms used in this specification are
B117 Practice for Operating Salt Spray (Fog) Apparatus
defined in Terminology B374.
B183 Practice for Preparation of Low-Carbon Steel for
3.2 Definitions of Terms Specific to This Standard:
Electroplating
3.2.1 significant surface, n—that portion of a coated arti-
B242 Guide for Preparation of High-Carbon Steel for Elec-
cle’s surface where the coating is required to meet all the
troplating
requirements of the coating specification for that article.
B320 Practice for Preparation of Iron Castings for Electro-
3.2.1.1 Discussion—Significant surfaces are usually those
plating
that are essential to the serviceability or function of the article,
B322 Guide for Cleaning Metals Prior to Electroplating
or that can be a source of corrosion products or tarnish films
B374 Terminology Relating to Electroplating
that interfere with the function or desirable appearance of the
B487 Test Method for Measurement of Metal and Oxide
article. Significant surfaces are those surfaces that are identi-
Coating Thickness by Microscopical Examination of
fied by the purchaser by, for example, indicating them on an
Cross Section
engineering drawing of the product or marking a sample item
of the product.
1
This specification is under the jurisdiction of ASTM Committee B08 on
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
4. Classification
B08.06 on Soft Metals.
Current edition approved May 1, 2023. Published May 2023. Originally
4.1 There is one class of zinc iron alloy that is defined as
approved in 1993. Last previous edition approved in 2022 as B842 – 22. DOI:
follows:
10.1520/B0842-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4.1.1 Class 1—Deposits having approximately 99 mass %
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
zinc, balance iron.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.2 There are two coating types that are defined as follows:
*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

---------------------- Page: 1 ----------------------
B842 − 23
4.2.1 Type A—Zinc
...

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: B842 − 22 B842 − 23
Standard Specification for
1
Electrodeposited Coatings of Zinc Iron Alloy Deposits
This standard is issued under the fixed designation B842; 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 the requirements for electrodeposited zinc iron alloy coatings on metals.
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
1.3 The following precautionary caveat pertains to the test method portion only, Section 8, of this specification: This standard
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
standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory
limitations prior to use.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B117 Practice for Operating Salt Spray (Fog) Apparatus
B183 Practice for Preparation of Low-Carbon Steel for Electroplating
B242 Guide for Preparation of High-Carbon Steel for Electroplating
B320 Practice for Preparation of Iron Castings for Electroplating
B322 Guide for Cleaning Metals Prior to Electroplating
B374 Terminology Relating to Electroplating
B487 Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section
B499 Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis
Metals
B504 Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method
B568 Test Method for Measurement of Coating Thickness by X-Ray Spectrometry
B571 Practice for Qualitative Adhesion Testing of Metallic Coatings
B602 Guide for Attribute Sampling of Metallic and Inorganic Coatings
B697 Guide for Selection of Sampling Plans for Inspection of Electrodeposited Metallic and Inorganic Coatings
B762 Guide of Variables Sampling of Metallic and Inorganic Coatings
B849 Specification for Pre-Treatments of Iron or Steel for Reducing Risk of Hydrogen Embrittlement
1
This specification is under the jurisdiction of ASTM Committee B08 on Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee B08.06 on Soft
Metals.
Current edition approved Nov. 15, 2022May 1, 2023. Published December 2022May 2023. Originally approved in 1993. Last previous edition approved in 20162022 as
B842 – 99B842 – 22.(2016). DOI: 10.1520/B0842-22.10.1520/B0842-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on 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

---------------------- Page: 1 ----------------------
B842 − 23
B850 Guide for Post-Coating Treatments of Steel for Reducing the Risk of Hydrogen Embrittlement
D3951 Practice for Commercial Packaging
3. Terminology
3.1 Definitions—Many terms used in this specification are defined in Terminology B374.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 significant surface, n—that portion of a coated article’s surface where the coating is required to meet all the requirements
of the coating specification for that article.
3.2.1.1 Discussion—
Significant surfaces are usually those that are essential to the serviceability or function of the article, or that can be a source of
corrosion products or tarnish films that interfere with the function or desirable appearance of the article. Significant surfaces are
those surfaces that are identified by the purchaser by, for example, indicating them on an engineering drawing of the product or
marking a sample item of the product.
4. Classification
4.1 There is one class of zinc iron alloy that
...