ASTM B605-22

Standard Specification for Electrodeposited Coatings of Tin-Nickel Alloy

ABSTRACT
This specification establishes the requirements for electrodeposited tin-nickel alloy coatings from aqueous solutions intended for the corrosion protection of fabricated articles of iron, steel, zinc-base alloys, copper, and copper alloys. This specification does not apply to sheets, strips, or wires in the fabricated form. It also may not be applicable to finely threaded articles, but the decision to use the coating on such components may be made by the purchaser. Coating grades shall be designated by a service condition number, which indicates the severity of exposure for which the coating is intended, and a coating thickness notation. Iron and steel specimens shall undergo pre- and post-coating treatments for reducing the risk of hydrogen embrittlement. Coatings shall be sampled, tested, and conform to specified requirements as to appearance (visible defects), composition, thickness (assessed either by microscopical, magnetic, coulometric, beta backscatter, or X-ray spectrometry), adhesion (determined either by burnishing, or heat-quench test), and integrity (including gross defects, mechanical damage, and porosity).
SCOPE
1.1 This specification covers the requirements for electrodeposited tin-nickel alloy coatings from aqueous solutions intended for the corrosion protection of fabricated articles of iron, steel, zinc-base alloys, copper, and copper alloys. The composition of the alloy remains constant at 65/35 tin-nickel in spite of wide fluctuations in both composition and operating conditions. The composition corresponds quite closely to an equiatomic ratio, and the process favors the co-deposition of tin and nickel atoms at identical rates.  
1.2 This specification does not apply to sheet, strip, or wire in the fabricated form. It also may not be applicable to threaded articles having basic major diameters up to and including 19 mm because of the nonuniformity of thickness that can be expected on fine threads. However, a decision to use the coating on such components may be made by the purchaser.  
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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.  
1.5 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: 14-Nov-2022
• 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: B605 −22
Standard Specification for
1
Electrodeposited Coatings of Tin-Nickel Alloy
This standard is issued under the fixed designation B605; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* B183Practice for Preparation of Low-Carbon Steel for
Electroplating
1.1 Thisspecificationcoverstherequirementsforelectrode-
B242Guide for Preparation of High-Carbon Steel for Elec-
posited tin-nickel alloy coatings from aqueous solutions in-
troplating
tended for the corrosion protection of fabricated articles of
B246Specification for Tinned Hard-Drawn and Medium-
iron, steel, zinc-base alloys, copper, and copper alloys. The
Hard-Drawn Copper Wire for Electrical Purposes
compositionofthealloyremainsconstantat65/35tin-nickelin
B252Guide for Preparation of Zinc Alloy Die Castings for
spite of wide fluctuations in both composition and operating
Electroplating and Conversion Coatings
conditions. The composition corresponds quite closely to an
B281Practice for Preparation of Copper and Copper-Base
equiatomic ratio, and the process favors the co-deposition of
Alloys for Electroplating and Conversion Coatings
tin and nickel atoms at identical rates.
B322Guide for Cleaning Metals Prior to Electroplating
1.2 This specification does not apply to sheet, strip, or wire
B374Terminology Relating to Electroplating
inthefabricatedform.Italsomaynotbeapplicabletothreaded
B487Test Method for Measurement of Metal and Oxide
articles having basic major diameters up to and including
Coating Thickness by Microscopical Examination of
19mm because of the nonuniformity of thickness that can be
Cross Section
expected on fine threads. However, a decision to use the
B499Test Method for Measurement of CoatingThicknesses
coating on such components may be made by the purchaser.
by the Magnetic Method: Nonmagnetic Coatings on
1.3 Units—The values stated in SI units are to be regarded
Magnetic Basis Metals
asstandard.Nootherunitsofmeasurementareincludedinthis
B504Test Method for Measurement of Thickness of Metal-
standard.
lic Coatings by the Coulometric Method
B507Practice for Design ofArticles to Be Electroplated on
1.4 This standard does not purport to address all of the
Racks
safety concerns, if any, associated with its use. It is the
B567Test Method for Measurement of Coating Thickness
responsibility of the user of this standard to establish appro-
by the Beta Backscatter Method
priate safety, health, and environmental practices and deter-
B568Test Method for Measurement of Coating Thickness
mine the applicability of regulatory limitations prior to use.
by X-Ray Spectrometry
1.5 This international standard was developed in accor-
B571Practice for Qualitative Adhesion Testing of Metallic
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the Coatings
B602Guide for Attribute Sampling of Metallic and Inor-
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical ganic Coatings
B634Specification for Electrodeposited Coatings of Rho-
Barriers to Trade (TBT) Committee.
dium for Engineering Use
2. Referenced Documents
B697Guide for Selection of Sampling Plans for Inspection
2
of Electrodeposited Metallic and Inorganic Coatings
2.1 ASTM Standards:
B762GuideofVariablesSamplingofMetallicandInorganic
Coatings
1
This specification is under the jurisdiction of ASTM Committee B08 on
B765GuideforSelectionofPorosityandGrossDefectTests
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
for Electrodeposits and Related Metallic Coatings
B08.06 on Soft Metals.
B809Test Method for Porosity in Metallic Coatings by
Current edition approved Nov. 15, 2022. Published December 2022. Originally
Humid Sulfur Vapor (“Flowers-of-Sulfur”)
approved in 1975. Last previous edition approved in 2015 as B605–95a(2015).
DOI: 10.1520/B0605-22.
B849Specification for Pre-Treatments of Iron or Steel for
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Reducing Risk of Hydrogen Embrittlement
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
B850GuideforPost-CoatingTreatmentsofSteelforReduc-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ing the Risk of Hydrogen Embrittlement
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM Internationa
...

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: B605 − 95a (Reapproved 2015) B605 − 22
Standard Specification for
1
Electrodeposited Coatings of Tin-Nickel Alloy
This standard is issued under the fixed designation B605; 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 Scope*
1.1 This specification covers the requirements for electrodeposited tin-nickel alloy coatings from aqueous solutions intended for
the corrosion protection of fabricated articles of iron, steel, zinc-base alloys, copper, and copper alloys. The composition of the
alloy remains constant at 65/35 tin-nickel in spite of wide fluctuations in both composition and operating conditions. The
composition corresponds quite closely to an equiatomic ratio, and the process favors the co-deposition of tin and nickel atoms at
identical rates.
1.2 This specification does not apply to sheet, strip, or wire in the fabricated form. It also may not be applicable to threaded articles
having basic major diameters up to and including 19 mm 19 mm because of the nonuniformity of thickness that can be expected
on fine threads. However, a decision to use the coating on such components may be made by the purchaser.
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
1.4 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.
1.5 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:
B183 Practice for Preparation of Low-Carbon Steel for Electroplating
B242 Guide for Preparation of High-Carbon Steel for Electroplating
B246 Specification for Tinned Hard-Drawn and Medium-Hard-Drawn Copper Wire for Electrical Purposes
B252 Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
B281 Practice for Preparation of Copper and Copper-Base Alloys for Electroplating and Conversion Coatings
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
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 March 1, 2015Nov. 15, 2022. Published April 2015December 2022. Originally approved in 1975. Last previous edition approved in 20092015
as B605 – 95a (2009).(2015). DOI: 10.1520/B0605-95AR15.10.1520/B0605-22.
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

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B605 − 22
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
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 Guide for Attribute Sampling of Metallic and Inorganic Coatings
B634 Specification for Electrodeposited Coatings of Rhodium for Engineering Use
B697 Guide for Selection of Sampling Plans for Inspection of Electrodeposited Metallic and Inorganic Coatings
B762 Guide of
...