ASTM B633-15

Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel

ABSTRACT
This specification establishes the requirements for electrodeposited zinc coatings applied to iron or steel articles for corrosion protection purposes. Electrodeposited zinc-coated steel wires or sheets are not covered here. The coatings shall be provided in four standard thickness classes in the as-plated condition or with one of three types of supplementary finishes. The surfaces of the articles shall under go pre-plating basis metal cleaning, pre- and post-coating treatment for reducing the risk of hydrogen embrittlement, and reactivation and supplementary treatments. Coatings should be sampled, prepared, tested and conform accordingly to specified requirements as to appearance (luster and workmanship), thickness, adhesion, corrosion resistance, and hydrogen embrittlement.
SCOPE
1.1 This specification covers material and process requirements for electrodeposited zinc coatings applied to iron or steel articles to protect them from corrosion.  
1.2 The coatings are provided in four standard thickness classes (4.1), in the as-plated condition or with one of five types of supplementary finishes (4.2).  
1.3 High strength metals, unless otherwise specified, including high strength steels having a tensile strength greater than 1700 MPa (247 ksi, 46HRC) shall not be electroplated.  
1.4 It does not cover continuous processes for electrodeposited zinc coated steel wire or sheets (see Specification A591/A591M for sheets.)  
1.5 It may be used for fasteners but specific specifications have been developed for manufacturing fasteners in Committee F16 which may be more applicable (see Specifications F1941 and F1941M.  
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.7 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 and health practices and determine the applicability of regulatory limitations prior to use.  
1.8 This standard has been revised to address RoHS requirements that seek to limit the exposure of workers and the public from exposure to toxic metals. Additional types V and VI have been added to permit non-chromate passivate treatments to be used in replacement of hexavalent chromium.

General Information

• Status: Historical
• Publication Date: 30-Nov-2015
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.06 - Soft Metals

Relations

• Replaces: ASTM B633-13 - Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel
• Effective Date: 01-Dec-2015
• Referred By: ASTM F1145-05(2022) - Standard Specification for Turnbuckles, Swaged, Welded, Forged
• Effective Date: 01-Dec-2015
• Referred By: ASTM F1941/F1941M-16 - Standard Specification for Electrodeposited Coatings on Mechanical Fasteners, Inch and Metric
• Effective Date: 01-Dec-2015
• Referred By: ASTM A194/A194M-23 - Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
• Effective Date: 01-Dec-2015
• Referred By: ASTM F1387-23 - Standard Specification for Performance of Piping and Tubing Mechanically Attached Fittings
• Effective Date: 01-Dec-2015
• Referred By: ASTM F782-19 - Standard Specification for Doors, Furniture, Marine
• Effective Date: 01-Dec-2015
• Referred By: ASTM B745/B745M-15(2021) - Standard Specification for Corrugated Aluminum Pipe for Sewers and Drains
• Effective Date: 01-Dec-2015
• Referred By: ASTM F1476-07(2019) - Standard Specification for Performance of Gasketed Mechanical Couplings for Use in Piping Applications
• Effective Date: 01-Dec-2015
• Referred By: ASTM D6255/D6255M-18 - Standard Specification for Steel or Aluminum Slotted Angle Crates
• Effective Date: 01-Dec-2015
• Referred By: ASTM F1548-01(2023) - Standard Specification for Performance of Fittings for Use with Gasketed Mechanical Couplings Used in Piping Applications
• Effective Date: 01-Dec-2015
• Referred By: ASTM A193/A193M-23 - Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
• Effective Date: 01-Dec-2015
• Referred By: ASTM D5363-16 - Standard Specification for Anaerobic Single-Component Adhesives (AN)
• Effective Date: 01-Dec-2015

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B633 −15
Standard Specification for
1
Electrodeposited Coatings of Zinc on Iron and Steel
This standard is issued under the fixed designation B633; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
2
1.1 This specification covers material and process require- 2.1 ASTM Standards:
mentsforelectrodepositedzinccoatingsappliedtoironorsteel A591/A591M Specification for Steel Sheet, Electrolytic
articles to protect them from corrosion. Zinc-Coated, for Light Coating Weight [Mass] Applica-
3
tions (Withdrawn 2005)
1.2 The coatings are provided in four standard thickness
B117 Practice for Operating Salt Spray (Fog) Apparatus
classes (4.1), in the as-plated condition or with one of five
B183 Practice for Preparation of Low-Carbon Steel for
types of supplementary finishes (4.2).
Electroplating
1.3 Highstrengthmetals,unlessotherwisespecified,includ-
B201 Practice for Testing Chromate Coatings on Zinc and
ing high strength steels having a tensile strength greater than
Cadmium Surfaces
1700 MPa (247 ksi, 46HRC) shall not be electroplated.
B242 Guide for Preparation of High-Carbon Steel for Elec-
troplating
1.4 It does not cover continuous processes for electrodepos-
ited zinc coated steel wire or sheets (see Specification A591/ B254 Practice for Preparation of and Electroplating on
Stainless Steel
A591M for sheets.)
B320 Practice for Preparation of Iron Castings for Electro-
1.5 It may be used for fasteners but specific specifications
plating
havebeendevelopedformanufacturingfastenersinCommittee
B322 Guide for Cleaning Metals Prior to Electroplating
F16 which may be more applicable (see Specifications F1941
B374 Terminology Relating to Electroplating
and F1941M.
B487 Test Method for Measurement of Metal and Oxide
1.6 The values stated in SI units are to be regarded as
Coating Thickness by Microscopical Examination of
standard. No other units of measurement are included in this
Cross Section
standard.
B499 Test Method for Measurement of Coating Thicknesses
1.7 This standard does not purport to address all of the by the Magnetic Method: Nonmagnetic Coatings on
safety concerns, if any, associated with its use. It is the Magnetic Basis Metals
responsibility of the user of this standard to establish appro- B504 Test Method for Measurement of Thickness of Metal-
priate safety and health practices and determine the applica- lic Coatings by the Coulometric Method
bility of regulatory limitations prior to use. B567 Test Method for Measurement of Coating Thickness
1.8 This standard has been revised to address RoHS re- by the Beta Backscatter Method
quirements that seek to limit the exposure of workers and the B568 Test Method for Measurement of Coating Thickness
public from exposure to toxic metals.Additional types Vand VI by X-Ray Spectrometry
have been added to permit non-chromate passivate treatments B571 Practice for Qualitative Adhesion Testing of Metallic
to be used in replacement of hexavalent chromium. Coatings
1 2
This specification is under the jurisdiction of ASTM Committee B08 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
B08.06 on Soft Metals. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Dec. 1, 2015. Published December 2015. Originally the ASTM website.
3
approved in 1978. Last previous edition approved in 2013 as B633 – 13. DOI: The last approved version of this historical standard is referenced on
10.1520/B0633-15. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B633−15
TABLE 2 Finish Type and Corrosion Resistance Requirements
B602 Test Method for Attribute Sampling of Metallic and
Inorganic Coatings Type Description Minimum Salt Spray
h
B697 Guide for Selection of Sampling Plans for Inspection
I As-plated without supplementary
of Electrodeposited Metallic and Inorganic Coatings
treatments
B748 Test Method for Measurement of Thickness of Metal- II With colored chromate coatings 96
III With colorless chromate 12
lic Coatings by Measurement of Cross Section with a
conversion coatings
Scanning Electron Microscope
IV With phosphate conversion
coatings
B762 Test Method of Variables Sampling of Metallic and
V With co
...

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: B633 − 13 B633 − 15
Standard Specification for
1
Electrodeposited Coatings of Zinc on Iron and Steel
This standard is issued under the fixed designation B633; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification covers material and process requirements for electrodeposited zinc coatings applied to iron or steel articles
to protect them from corrosion.
1.2 The coatings are provided in four standard thickness classes (4.1), in the as-plated condition or with one of five types of
supplementary finishes (4.2).
1.3 High strength metals, unless otherwise specified, including high strength steels having a tensile strength greater than 1700
MPa (247 ksi, 46HRC) shall not be electroplated.
1.4 It does not cover continuous processes for electrodeposited zinc coated steel wire or sheets (see Specification A591/A591M
for sheets.)
1.5 It may be used for fasteners but specific specifications have been developed for manufacturing fasteners in Committee F16
which may be more applicable (see Specifications F1941 and F1941M.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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 and health practices and determine the applicability of regulatory
limitations prior to use.
1.8 This standard has been revised to address RoHS requirements that seek to limit the exposure of workers and the public from
exposure to toxic metals. Additional types V and VI have been added to permit non-chromate passivate treatments to be used in
replacement of hexavalent chromium.
2. Referenced Documents
2
2.1 ASTM Standards:
A591/A591M Specification for Steel Sheet, Electrolytic Zinc-Coated, for Light Coating Weight [Mass] Applications (Withdrawn
3
2005)
B117 Practice for Operating Salt Spray (Fog) Apparatus
B183 Practice for Preparation of Low-Carbon Steel for Electroplating
B201 Practice for Testing Chromate Coatings on Zinc and Cadmium Surfaces
B242 Guide for Preparation of High-Carbon Steel for Electroplating
B254 Practice for Preparation of and Electroplating on Stainless Steel
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
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 May 15, 2013Dec. 1, 2015. Published June 2013December 2015. Originally approved in 1978. Last previous edition approved in 20112013 as
B633 – 11.B633 – 13. DOI: 10.1520/B0633-13.10.1520/B0633-15.
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.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B633 − 15
B504 Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method
B567 Test Method for Measurement of Coating Thickness by the Beta Backscatter Method
B568 Test Method for Measurement of Coating Thickness by X-Ray Spectrometry
B571 Practice for Qualitative Adhesion Testing of Metallic Coatings
B602 Test Method for Attribute Sampling of Metallic and Inorganic Coatings
B697 Guide for Selection of Sampling Plans for Inspection of Electrodeposited Metallic and Inorganic Coatings
B748 Test Method for Measurement of Thickness of Metallic Coatings by Measurement of Cross Section with a Scanning
Elect
...