ASTM B650-95(2018)

Standard Specification for Electrodeposited Engineering Chromium Coatings on Ferrous Substrates

ABSTRACT
This specification covers the requirements for electrodeposited chromium coatings (sometimes referred to as functional or hard chromium) applied to ferrous alloy substrates for engineering applications, particularly for increasing wear, abrasion, fretting, and corrosion resistance; for reducing galling or seizing, and static and kinetic friction; and for building up undersize or worn parts. Coatings shall be classified according to their thickness. Coatings shall be sampled, tested, and shall conform accordingly to specified requirements as to appearance, stress relief and hydrogen embrittlement treatment, thickness (to measured either by microscopical, magnetic, coulometric, or X-ray spectrometry method), adhesion (to be assessed either by bend, file, heat and quench, or push test), porosity (to be examined either by ferroxyl, neutral salt spray, or copper sulfate test), workmanship, and packaging.
SCOPE
1.1 This specification covers the requirements for electrodeposited chromium coatings applied to ferrous alloys for engineering applications.  
1.2 Electrodeposited engineering chromium, which is sometimes called “functional” or “hard” chromium, is usually applied directly to the basis metal and is much thicker than decorative chromium. Engineering chromium is used for the following:  
1.2.1 To increase wear and abrasion resistance,  
1.2.2 To increase fretting resistance,  
1.2.3 To reduce static and kinetic friction,  
1.2.4 To reduce galling or seizing, or both, for various metal combinations,  
1.2.5 To increase corrosion resistance, and  
1.2.6 To build up undersize or worn parts.  
1.3 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: Historical
• Publication Date: 31-May-2018
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.03 - Engineering Coatings

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: B650 − 95 (Reapproved 2018)
Standard Specification for
Electrodeposited Engineering Chromium Coatings on
1
Ferrous Substrates
This standard is issued under the fixed designation B650; 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
2.1 ASTM Standards:
1.1 This specification covers the requirements for electrode-
B117 Practice for Operating Salt Spray (Fog) Apparatus
posited chromium coatings applied to ferrous alloys for engi-
B177 Guide for Engineering Chromium Electroplating
neering applications.
B183 Practice for Preparation of Low-Carbon Steel for
1.2 Electrodeposited engineering chromium, which is some-
Electroplating
times called “functional” or “hard” chromium, is usually
B242 Guide for Preparation of High-Carbon Steel for Elec-
applied directly to the basis metal and is much thicker than
troplating
decorative chromium. Engineering chromium is used for the
B320 Practice for Preparation of Iron Castings for Electro-
following:
plating
1.2.1 To increase wear and abrasion resistance,
B374 Terminology Relating to Electroplating
1.2.2 To increase fretting resistance,
B487 Test Method for Measurement of Metal and Oxide
1.2.3 To reduce static and kinetic friction,
Coating Thickness by Microscopical Examination of
1.2.4 To reduce galling or seizing, or both, for various metal
Cross Section
combinations,
B499 Test Method for Measurement of Coating Thicknesses
1.2.5 To increase corrosion resistance, and
by the Magnetic Method: Nonmagnetic Coatings on
1.2.6 To build up undersize or worn parts.
Magnetic Basis Metals
B504 Test Method for Measurement of Thickness of Metal-
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the lic Coatings by the Coulometric Method
B507 Practice for Design of Articles to Be Electroplated on
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- Racks
mine the applicability of regulatory limitations prior to use. B568 Test Method for Measurement of Coating Thickness
1.4 This international standard was developed in accor- by X-Ray Spectrometry
B571 Practice for Qualitative Adhesion Testing of Metallic
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the Coatings
B602 Test Method for Attribute Sampling of Metallic and
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical Inorganic Coatings
B697 Guide for Selection of Sampling Plans for Inspection
Barriers to Trade (TBT) Committee.
of Electrodeposited Metallic and Inorganic Coatings
B762 Test Method of Variables Sampling of Metallic and
Inorganic Coatings
1
This specification is under the jurisdiction of ASTM Committee B08 on
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
2
B08.03 on Engineering Coatings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2018. Published December 2013. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1978. Last previous edition approved in 2013 as B650 – 95(2013). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0650-95R18. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B650 − 95 (2018)
B849 Specification for Pre-Treatments of Iron or Steel for 5.1.6 Thickness of the deposit or class (see 4.1),
Reducing Risk of Hydrogen Embrittlement 5.1.7 Control record requirements,
B850 Guide for Post-Coating Treatments of Steel for Reduc- 5.1.8 Preproduction test specimens, if required,
ing the Risk of Hydrogen Embrittlement 5.1.9 Sampling plan, if different from that specified in Test
D3951 Practice for Commercial Packaging Method B602 (see Section 8),
E8 Test Methods for Tension Testing of Metallic Materials 5.1.10 The number of test specimens for destructive testing
F1459 Test Method for Determination of the Susceptibility (see 7.1),
of Metallic Materials to Hydrogen Gas Embrittlement 5.1.11 Thickness, adhesion, porosity, and hydrogen em-
(HGE) brittlement tests required (see Section 6),
5.1.12 Whether separate test specimens will be used (see 7.1
2.2 Other Standard:
3
MIL-S-13165 Shot Pe
...

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: B650 − 95 (Reapproved 2013) B650 − 95 (Reapproved 2018)
Standard Specification for
Electrodeposited Engineering Chromium Coatings on
1
Ferrous Substrates
This standard is issued under the fixed designation B650; 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 the requirements for electrodeposited chromium coatings applied to ferrous alloys for engineering
applications.
1.2 Electrodeposited engineering chromium, which is sometimes called “functional” or “hard” chromium, is usually applied
directly to the basis metal and is much thicker than decorative chromium. Engineering chromium is used for the following:
1.2.1 To increase wear and abrasion resistance,
1.2.2 To increase fretting resistance,
1.2.3 To reduce static and kinetic friction,
1.2.4 To reduce galling or seizing, or both, for various metal combinations,
1.2.5 To increase corrosion resistance, and
1.2.6 To build up undersize or worn parts.
1.3 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 safety, health, and healthenvironmental 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
B177 Guide for Engineering Chromium Electroplating
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
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
B507 Practice for Design of Articles to Be Electroplated on Racks
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
1
This specification is under the jurisdiction of ASTM Committee B08 on Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee B08.03 on
Engineering Coatings.
Current edition approved Dec. 1, 2013June 1, 2018. Published December 2013. Originally approved in 1978. Last previous edition approved in 20082013 as
B650 – 95(2008).(2013). DOI: 10.1520/B0650-95R13.10.1520/B0650-95R18.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B650 − 95 (2018)
B762 Test Method of Variables Sampling of Metallic and Inorganic Coatings
B849 Specification for Pre-Treatments of Iron or Steel for Reducing Risk of Hydrogen Embrittlement
B850 Guide for Post-Coating Treatments of Steel for Reducing the Risk of Hydrogen Embrittlement
D3951 Practice for Commercial Packaging
E8 Test Methods for Tension Testing of Metallic Materials
F1459 Test Method for Determination of the Susceptibility of Metallic Materials to Hydrogen Gas Embrittlement (HGE)
2.2 Other Standard:
3
MIL-S-13165 Shot Peening of Metal Parts
3. Terminology
3.1 Definitions:
3.1.1 significant surfaces—all surfaces upon which a deposit of controll
...