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ASTM B489-85(2013)

(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
4.1 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.2  
1.2 Test Methods E8 can be used if the coatings are too ductile and require mandrels too small to be practical.  
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Nov-2013
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(2008)e1 - Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals
Effective Date
01-Dec-2013
Referred By
ASTM B832-93(2018) - Standard Guide for Electroforming with Nickel and Copper
Effective Date
01-Dec-2013
Referred By
ASTM B679-98(2021) - Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use
Effective Date
01-Dec-2013
Referred By
ASTM B488-18 - Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses
Effective Date
01-Dec-2013
Referred By
ASTM B984-12(2020)e1 - Standard Specification for Electrodeposited Coatings of Palladium-Cobalt Alloy for Engineering Use
Effective Date
01-Dec-2013
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-Dec-2013
Referred By
ASTM B867-95(2018) - Standard Specification for Electrodeposited Coatings of Palladium-Nickel for Engineering Use
Effective Date
01-Dec-2013
Referred By
ASTM B604-91(2019) - Standard Specification for Decorative Electroplated Coatings of Copper Plus Nickel Plus Chromium on Plastics
Effective Date
01-Dec-2013

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ASTM B489-85(2013) - Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on MetalsASTM B489-85(2013) - Standard Practice for Bend Test for Ductility of Electrodeposited and Autocatalytically Deposited Metal Coatings on Metals
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ASTM B489-85(2013) - 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: B489 − 85 (Reapproved 2013)
Standard Practice for
Bend Test for Ductility of Electrodeposited and
Autocatalytically Deposited Metal Coatings on Metals
This standard is issued under the fixed designation B489; 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 4. Significance and Use
4.1 The routine measurement of the ductility of electrode-
1.1 Thispracticecoversatestprocedurefordeterminingthe
posited and autocatalytically deposited metal coatings can be
ductility of electrodeposited and autocatalytically deposited
useful in process control, especially when the electroplating
coatings on sheet or strip basis metals. The purpose of the test
process is used for decorative and engineering purposes.
is to determine the resistance of metal coatings to cracking
during distortion.
5. Apparatus
1.2 Test Methods E8 can be used if the coatings are too
5.1 Series of Mandrels, with diameters from 6 to 50 mm, in
ductile and require mandrels too small to be practical.
3-mmstepswithlengthsof100to150mmsotheycanbeheld
1.3 The values stated in SI units are to be regarded as in a vise.
standard. No other units of measurement are included in this
5.2 Micrometer, to measure the thickness of the test speci-
standard.
mens.
1.4 This standard does not purport to address all of the
5.3 Guillotine Shearsorotherdevicetocutthespecimensto
safety concerns, if any, associated with its use. It is the
size.
responsibility of the user of this standard to establish appro-
5.4 File or Grindertoremoveburrsandtoroundorchamfer
priate safety and health practices and determine the applica-
edges.
bility of regulatory limitations prior to use.
5.5 Vise, to hold mandrels.
2. Referenced Documents
5.6 Magnifier, 10×.
2.1 ASTM Standards:
6. Test Specimen
B177Guide for Engineering Chromium Electroplating
6.1 Flat specimens, 10 mm wide, and not less than 150 mm
D1193Specification for Reagent Water
long, shall be cut from the electroplated or coated article if the
E8Test Methods for Tension Testing of Metallic Materials
shapepermits,nocloserthan25mmfromtheedges.Guillotine
shears are preferred, but any convenient method may be used.
3. Summary of Practice
Basis metal thickness and temper shall be suitable to permit
3.1 The practice consists of bending a narrow strip of the
bending around the smallest diameter mandrel, if necessary.
electroplated or coated article over a mandrel. An elongation
Low-carbonAISI 1010 to 1025 steel strip or sheet, 0.25 to 1.0
measurement is obtained from the smallest diameter mandrel
mm thick is usually suitable. Basis metals that have low
that does not cause the coating to fracture.
ductility can initiate cracks that can propagate through the
coatings.Theprocedureindicatedin6.2shallthenbefollowed.
6.2 When the shape is such that a test specimen cannot be
This practice is under the jurisdiction of ASTM Committee B08 on Metallic
obtained from the part, a test panel may be prepared of
and Inorganic Coatings and is the direct responsibility of Subcommittee B08.10 on
appropriate basis metal, such as low-carbon steel (see 6.1),
Test Methods.
withthesamecoatingsysteminthesamebaths.Thepanelshall
Current edition approved Dec. 1, 2013. Published December 2013. Originally
ε1
approved in 1968. Last previous edition approved in 2008 as B489–85(2008) .
be sufficiently large to obtain several pieces after trimming 25
DOI: 10.1520/B0489-85R13.
mm from the edges. The specimens shall be prepared in
For a discussion and theory for this test see Mohrnheim,A. F., “The BendTest
accordance with 6.1. Brass or copper panels may be used
forMeasuringtheStrainLimitofSurfaces,” Plating,Vol50,1963,pp.1094–1099.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or instead of copper-electroplated zinc alloy panels.
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
6.3 The long edges of the test pieces shall be rounded or
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. chamfered by filing or grinding.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B489 − 85 (2013)
7. Procedure 7.3 Exceptforveryductilecoatings,theapparentductilityis
an inverse function of the thickness. If the test is to be used to
7.1 Place the largest mandrel in the vise. Bend the test
evaluate the electroplating or autocatalytic process by periodi-
specimen,withthecoatingoutward,overthemandrelsothatas
cally testing the ductility of coatings produced by the process,
the bend progresses the test specimen will remain in contact
all specimens used must have approximately the same coating
with the top of the mandrel. Continue bending with slow,
and total thickness.
steadilyappliedpressureuntilthetwolegsareparallel.Ifthere
are no cracks visible under a 10× magnifier, repeat the test,
8. Calcula
...

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