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ASTM B680-80(2019)

(Test Method)

Standard Test Method for Seal Quality of Anodic Coatings on Aluminum by Acid Dissolution

Standard Test Method for Seal Quality of Anodic Coatings on Aluminum by Acid Dissolution

SIGNIFICANCE AND USE
3.1 This test method describes a destructive test procedure for measuring the degree of seal of the porosity in anodic oxide coatings. Low coating mass loss is an indication of good seal quality and of the ability of the coating to resist staining and “blooming” in many types of service.  
3.2 This test method is suitable for quality control purposes within manufacturing operations and for determining whether anodized parts meet seal quality requirements in applicable specifications.
SCOPE
1.1 This test method covers a test for the quality of seal of porous anodic coatings on aluminum and its alloys. It is based upon the loss in mass of the coating after immersion in a warm phosphoric-chromic acid solution.  
1.2 This test method is applicable to anodic coatings intended for exposure to the weather, or for protective purposes in corrosive media, and where resistance to staining is important.  
1.3 This test method is not applicable to:  
1.3.1 Hard coatings, which normally are not sealed.  
1.3.2 Anodic coatings that have been sealed only in dichromate solutions.  
1.3.3 Anodic coatings that have undergone a treatment to render them hydrophobic.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
1.6 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
30-Sep-2019
ICS
25.220.40 - Metallic coatings
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.07 - Conversion Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM B680-80(2014) - Standard Test Method for Seal Quality of Anodic Coatings on Aluminum by Acid Dissolution
Effective Date
01-Oct-2019
Refers
ASTM B137-95(2009) - Standard Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum
Effective Date
15-Apr-2009
Refers
ASTM D1193-06 - Standard Specification for Reagent Water
Effective Date
01-Mar-2006
Refers
ASTM B137-95(2004) - Standard Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum
Effective Date
01-Oct-2004
Refers
ASTM B137-95(2000) - Standard Test Method for Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum
Effective Date
10-Mar-2000
Refers
ASTM D1193-99e1 - Standard Specification for Reagent Water
Effective Date
10-Feb-1999
Refers
ASTM D1193-99 - Standard Specification for Reagent Water
Effective Date
10-Feb-1999

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ASTM B680-80(2019) - Standard Test Method for Seal Quality of Anodic Coatings on Aluminum by Acid DissolutionASTM B680-80(2019) - Standard Test Method for Seal Quality of Anodic Coatings on Aluminum by Acid Dissolution
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ASTM B680-80(2019) - Standard Test Method for Seal Quality of Anodic Coatings on Aluminum by Acid Dissolution
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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: B680 − 80 (Reapproved 2019)
Standard Test Method for
Seal Quality of Anodic Coatings on Aluminum by Acid
Dissolution
This standard is issued under the fixed designation B680; 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 2. Referenced Documents
2.1 ASTM Standards:
1.1 This test method covers a test for the quality of seal of
B137 Test Method for Measurement of Coating Mass Per
porous anodic coatings on aluminum and its alloys. It is based
Unit Area on Anodically Coated Aluminum
upon the loss in mass of the coating after immersion in a warm
D1193 Specification for Reagent Water
phosphoric-chromic acid solution.
1.2 This test method is applicable to anodic coatings in-
3. Significance and Use
tended for exposure to the weather, or for protective purposes
3.1 This test method describes a destructive test procedure
in corrosive media, and where resistance to staining is impor-
for measuring the degree of seal of the porosity in anodic oxide
tant.
coatings. Low coating mass loss is an indication of good seal
quality and of the ability of the coating to resist staining and
1.3 This test method is not applicable to:
“blooming” in many types of service.
1.3.1 Hard coatings, which normally are not sealed.
3.2 This test method is suitable for quality control purposes
1.3.2 Anodic coatings that have been sealed only in dichro-
within manufacturing operations and for determining whether
mate solutions.
anodized parts meet seal quality requirements in applicable
1.3.3 Anodic coatings that have undergone a treatment to
specifications.
render them hydrophobic.
4. Apparatus
1.4 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
4.1 Laboratory Balance, accurate to 1 mg.
standard.
4.2 Glass Container, means of heating and stirring, and a
1.5 This standard does not purport to address all of the
thermometer. There shall be no metal in contact with the test
safety concerns, if any, associated with its use. It is the
specimen or the solution.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- 5. Acid Test Solution
mine the applicability of regulatory limitations prior to use.
5.1 The test solution shall have the following makeup:
1.6 This international standard was developed in accor-
Chromic acid anhydride (CrO ) 20±0.5g
dance with internationally recognized principles on standard-
Orthophosphoric acid of 85 mass %, density 1.69 35 ± 0.5 mL
Distilled or deionized water conforming with Type III 1000 mL
ization established in the Decision on Principles for the
Reagent Water of Specification D1193, to make
Development of International Standards, Guides and Recom-
up to
mendations issued by the World Trade Organization Technical
NOTE 1—This solution is commonly referred to as a “stripping
Barriers to Trade (TBT) Committee.
solution” for anodic coatings and is of the same composition as that
employedinTestMethodB137.Thissolutiondissolvestheanodiccoating
with no significant attack of the substrate metal.
5.2 The test solution may be used repeatedly but shall be
discarded after1gof anodic coating has been dissolved per
litre of solution.
This test method is under the jurisdiction ofASTM Committee B08 on Metallic
and Inorganic Coatings and is the direct responsibility of Subcommittee B08.07 on
Conversion Coatings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2019. Published October 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual
...

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ASTM B867-95(2023)(Specification)
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This specification establishes the requirements for electrodeposited palladium-nickel (Pd-Ni) coatings for engineering applications. Composite coatings consisting of palladium-nickel and a thin gold over-plate for applications involving electrical contacts are also covered. The classification system for the coatings covered here shall be specified by the basis metal, the thickness of the underplating, the composition type and thickness class of the palladium-nickel coating, and the grade of the gold overplating. Coatings should be sampled, tested, and conform to specified requirements as to purity, appearance, thickness, composition, adhesion, ductility, and integrity (including gross defects, mechanical damage, porosity, and microcracks). Alloy composition shall be examined either by wet method, X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Auger or electron probe X-ray microanalysis (EPMA), or wavelength dispersive spectroscopy (WDS). Coating adhesion shall be analyzed either by bend, heat, or cutting test.
SCOPE
1.1 Composition—This specification covers requirements for electrodeposited palladium-nickel coatings containing between 70 and 95 mass % of palladium metal. Composite coatings consisting of palladium-nickel and a thin gold overplate for applications involving electrical contacts are also covered.  
1.2 Properties—Palladium is the lightest and least noble of the platinum group metals. Palladium-nickel is a solid solution alloy of palladium and nickel. Electroplated palladium-nickel alloys have a density between 10 and 11.5, which is substantially less than electroplated gold (17.0 to 19.3) and comparable to electroplated pure palladium (10.5 to 11.8). This yields a greater volume or thickness of coating per unit mass and, consequently, some saving of metal weight. The hardness range of electrodeposited palladium-nickel compares favorably with electroplated noble metals and their alloys (1, 2).2  
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Approximate Hardness (HK25)  
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Ruthenium  
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