ASTM B767-88(2001)

Standard Guide for Determining Mass Per Unit Area of Electrodeposited and Related Coatings by Gravimetric and Other Chemical Analysis Procedures

SCOPE
1.1 This guide outlines a general method for determining the mass per unit area of electrodeposited, electroless, mechanically-deposited, vacuum-deposited, anodicoxide, and chemical conversion coatings by gravimetric and other chemical analysis procedures.  
1.2 This guide determines the average mass per unit area over a measured area.  
1.3 The stripping methods cited are described in specifications or in the open literature or have been used routinely by at least one laboratory.  
1.4 The procedures outlined can be used for many coating-substrate combinations. They cannot be used where the coating cannot be separated from the substrate by chemical or physical means as would be the case if white brass were plated with yellow brass.  
1.5 In principle, these procedures can be used to measure very thin coatings or to measure coatings over small areas, but not thin coatings over small areas. The limits depend on the required accuracy. For example, 2.5 mg/cm  of coating might require 2.5 mg of coating covering 1 cm , but 0.1 mg/cm  of coating would require 25 cm  to obtain 2.5 mg of coating.  
1.6 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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: 25-Aug-1988
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.10 - Test Methods

Relations

• Replaces: ASTM B767-88(1994) - Standard Guide for Determining Mass Per Unit Area of Electrodeposited and Related Coatings by Gravimetric and Other Chemical Analysis Procedures
• Effective Date: 26-Aug-1988
• Replaced By: ASTM B767-88(2006) - Standard Guide for Determining Mass Per Unit Area of Electrodeposited and Related Coatings by Gravimetric and Other Chemical Analysis Procedures
• Effective Date: 01-Apr-2006
• Referred By: ASTM B659-90(2021) - Standard Guide for Measuring Thickness of Metallic and Inorganic Coatings
• Effective Date: 26-Aug-1988
• Referred By: ASTM B449-93(2022) - Standard Specification for Chromates on Aluminum
• Effective Date: 26-Aug-1988

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:B767–88(Reapproved 2001)
Standard Guide for
Determining Mass Per Unit Area of Electrodeposited and
Related Coatings by Gravimetric and Other Chemical
1
Analysis Procedures
This standard is issued under the fixed designation B 767; 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.
2
1. Scope Aluminum-Coated Iron or Steel Articles
B 137 Test Method for Measurement of Coating Mass Per
1.1 This guide outlines a general method for determining
3
Unit Area on Anodically Coated Aluminum
the mass per unit area of electrodeposited, electroless,
3
B 449 Specification for Chromates on Aluminum
mechanically-deposited, vacuum-deposited, anodicoxide, and
2.2 British Standards Institution Documents:
chemical conversion coatings by gravimetric and other chemi-
BS 729 Hot Dip Galvanized Coatings on Iron and Steel
cal analysis procedures.
4
Articles, Specification for:
1.2 This guide determines the average mass per unit area
BS 1706 Electroplated Coatings of Cadmium and Zinc on
over a measured area.
4
Iron and Steel, Specification for:
1.3 The stripping methods cited are described in specifica-
4
BS 1872 Electroplated Coatings of Tin, Specification for:
tions or in the open literature or have been used routinely by at
BS 3189 Phosphate Treatment of Iron and Steel, Specifica-
least one laboratory.
4
tion for:
1.4 The procedures outlined can be used for many coating-
BS 3382 Electroplated Coatings on Threaded Components,
substrate combinations.They cannot be used where the coating
4
Specification for:
cannot be separated from the substrate by chemical or physical
BS 3597 Electroplated Coatings of 65/35 Tin-Nickel Alloy,
means as would be the case if white brass were plated with
4
Specification for:
yellow brass.
2.3 Government Standards:
1.5 In principle, these procedures can be used to measure
2.3.1 DOD Standard:
very thin coatings or to measure coatings over small areas, but
DOD-P-16232F Phosphate Coatings, Heavy, Manganese or
not thin coatings over small areas. The limits depend on the
5
2
Zinc Base (for Ferrous Metals)
required accuracy. For example, 2.5 mg/cm of coating might
2 2
2.3.2 Federal Standards:
require 2.5 mg of coating covering 1 cm , but 0.1 mg/cm of
2
FED-STD 151b Metals; Test Methods: Test 513.1 for
coating would require 25 cm to obtain 2.5 mg of coating.
Weight of Coating on Hot Dip Tin Plate and Electrolytic
1.6 This standard does not purport to address all of the
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Tin Plate
safety concerns, if any, associated with its use. It is the
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RR-T-51D Tableware and Flatware—Silverplated
responsibility of the user of this standard to establish appro-
2.3.3 Military Standard:
priate safety and health practices and determine the applica-
5
MIL-M-45202C Magnesium Alloys, Anodic Treatment of
bility of regulatory limitations prior to use.
2.4 ISO Standards:
2. Referenced Documents ISO 2081 Metallic Coatings—Electroplated Coatings of
7
Zinc on Iron or Steel
2.1 ASTM Standards:
ISO 2082 Metallic Coatings—Electroplated Coatings on
A 90/A 90 M Test Method for Weight (Mass) of Coating on
7
2
Cadmium on Iron or Steel
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
ISO 2093 Metallic Coatings—Electrodeposited Coatings of
A 309 Test Method for Weight and Composition of Coating
7
2
Tin, Annex B
on Terne Sheet by the Triple-Spot Test
A 428 Test Method for Weight (Mass) of Coating on
3
Annual Book of ASTM Standards, Vol 02.05.
4
Available from British Standards Institution, Linford Wood, Milton Keynes
1
This guide is under the jurisdiction of ASTM Committee B08 on Metallic and MK14 6L3, England.
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Inorganic Coatings and is the direct responsibility of Subcommittee B08.10 on AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
General Test Methods. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
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Current edition approved Aug. 26, 1988. Published April 1989. Originally Available from U.S. Government Printing Office, Washington, DC 20402.
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published as B 767 – 87. Last previous edition B 767 – 87. Available from American National Standards Institute, 11 W. 42nd St., 13th
2
Annual Book of ASTM Standards, Vol 01.06. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B767
ISO 2106 Anodizing of Aluminum and its Alloys— the specimen flush with the edges of the blocks and then to
Determination of Mass Per UnitArea (Surface Density) of grind and polish the edges metallographically.
7
Anodic Oxide Coatings—Gravimetric Method 6.4 Heat Treatment—If the
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