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ASTM B489-85(2003)

(Practice)

Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals

Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals

SIGNIFICANCE AND USE
The routine measurement of the ductility of electrodeposited and autocatalytically deposited metal coatings can be useful in process control, especially when the electroplating process is used for decorative and engineering purposes.
SCOPE
1.1 This practice covers a test procedure for determining the ductility of electrodeposited and autocatalytically deposited coatings on sheet or strip basis metals. The purpose of the test is to determine the resistance of metal coatings to cracking during distortion.  
1.2 Test Methods E8 can be used if the coatings are too ductile and require mandrels too small to be practical.  
1.3  This standard does not purport to address all of the safety problems, 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.

General Information

Status
Historical
Publication Date
30-Sep-2003
ICS
25.220.40 - Metallic coatings
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.10 - Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM B489-85(1998) - Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals
Effective Date
01-Oct-2003
Replaced By
ASTM B489-85(2008)e1 - Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals
Effective Date
01-Apr-2008
Referred By
ASTM B867-95(2018) - Standard Specification for Electrodeposited Coatings of Palladium-Nickel for Engineering Use
Effective Date
01-Oct-2003
Referred By
ASTM B832-93(2018) - Standard Guide for Electroforming with Nickel and Copper
Effective Date
01-Oct-2003
Referred By
ASTM B456-17(2022) - Standard Specification for Electrodeposited Coatings of Copper Plus Nickel Plus<brk/> Chromium and Nickel Plus Chromium
Effective Date
01-Oct-2003
Referred By
ASTM B604-91(2019) - Standard Specification for Decorative Electroplated Coatings of Copper Plus Nickel Plus Chromium on Plastics
Effective Date
01-Oct-2003
Referred By
ASTM B984-12(2020)e1 - Standard Specification for Electrodeposited Coatings of Palladium-Cobalt Alloy for Engineering Use
Effective Date
01-Oct-2003
Referred By
ASTM B679-98(2021) - Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use
Effective Date
01-Oct-2003
Referred By
ASTM B488-18 - Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses
Effective Date
01-Oct-2003

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ASTM B489-85(2003) - Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on MetalsASTM B489-85(2003) - Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals
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ASTM B489-85(2003) - Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals
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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:B 489–85(Reapproved 2003)
Standard Practice for
Bend Test for Ductility of Electrodeposited and
Autocatalytically Deposited Metal Coatings on Metals
This standard is issued under the fixed designation B 489; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Apparatus
1.1 Thispracticecoversatestprocedurefordeterminingthe 5.1 Series of Mandrels, with diameters from 6 to 50 mm, in
ductility of electrodeposited and autocatalytically deposited 3-mm steps with lengths of 100 to 150 mm so they can be held
coatings on sheet or strip basis metals. The purpose of the test in a vise.
is to determine the resistance of metal coatings to cracking 5.2 Micrometer, to measure the thickness of the test speci-
during distortion. mens.
1.2 Test Methods E 8 can be used if the coatings are too 5.3 Guillotine Shearsorotherdevicetocutthespecimensto
ductile and require mandrels too small to be practical. size.
1.3 This standard does not purport to address all of the 5.4 File or Grindertoremoveburrsandtoroundorchamfer
safety concerns, if any, associated with its use. It is the edges.
responsibility of the user of this standard to establish appro- 5.5 Vise, to hold mandrels.
priate safety and health practices and determine the applica- 5.6 Magnifier, 103.
bility of regulatory limitations prior to use.
6. Test Specimen
2. Referenced Documents
6.1 Flat specimens, 10 mm wide, and not less than 150 mm
2.1 ASTM Standards: long, shall be cut from the electroplated or coated article if the
B 177 Guide for Engineering Chromium Electroplating shapepermits,nocloserthan25mmfromtheedges.Guillotine
D 1193 Specification for Reagent Water shears are preferred, but any convenient method may be used.
E 8 Test Methods for Tension Testing of Metallic Materials Basis metal thickness and temper shall be suitable to permit
bending around the smallest diameter mandrel, if necessary.
3. Summary of Practice
Low-carbonAISI 1010 to 1025 steel strip or sheet, 0.25 to 1.0
3.1 The practice consists of bending a narrow strip of the mm thick is usually suitable. Basis metals that have low
electroplated or coated article over a mandrel. An elongation
ductility can initiate cracks that can propagate through the
measurement is obtained from the smallest diameter mandrel coatings.Theprocedureindicatedin6.2shallthenbefollowed.
that does not cause the coating to fracture.
6.2 When the shape is such that a test specimen cannot be
obtained from the part, a test panel may be prepared of
4. Significance and Use
appropriate basis metal, such as low-carbon steel (see 6.1),
4.1 The routine measurement of the ductility of electrode-
withthesamecoatingsysteminthesamebaths.Thepanelshall
posited and autocatalytically deposited metal coatings can be
be sufficiently large to obtain several pieces after trimming 25
useful in process control, especially when the electroplating
mm from the edges. The specimens shall be prepared in
process is used for decorative and engineering purposes.
accordance with 6.1. Brass or copper panels may be used
instead of copper-electroplated zinc alloy panels.
6.3 The long edges of the test pieces shall be rounded or
This practice is under the jurisdiction of ASTM Committee B08 on Metallic
chamfered by filing or grinding.
and Inorganic Coatings and is the direct responsibility of Subcommittee B08.10 on
Test Methods.
Current edition approved Oct. 1, 2003. Published October 2003. Originally 7. Procedure
approved in 1968. Last previous edition approved in 1998 as B 489 – 85 (1998).
7.1 Place the largest mandrel in the vise. Bend the test
For a discussion and theory for this test see Mohrnheim, A. F., “the Bend Test
specimen,withthecoatingoutward,overthemandrelsothatas
forMeasuringtheStrainLimitofSurfaces,” Plating,Vol50,1963,pp.1094 – 1099.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the bend progresses the test specimen will remain in contact
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
with the top of the mandrel. Continue bending with slow,
Standards volume information, refer to the standard’s Document Summary page on
steadily applied pressure until the two legs are parallel. If there
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 489–85 (2003)
are no cracks visible under a 103 magnifier, repeat the test, cally testing the ductility of coatings produced by the process,
using new specimens, on progressively smaller-diameter man- all specimens used must have approximately the same coating
drels, until cracks appear across or through the coating. Take and total thickness.
the preceding mandrel diameter as the value for the ductility
8. Calculation
determination. If the coating is elect
...

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