ASTM B765-03(2013)
Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings

Standard No.
ASTM B765-03(2013)
Release Date
2003
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM B765-03(2018)
Latest
ASTM B765-03(2023)
Scope

4.1 Porosity tests indicate the completeness of protection or coverage offered by the coating. When a given coating is known to be protective when properly deposited, the porosity serves as a measure of the control of the process. The effects of substrate finish and preparation, plating bath, coating process, and handling, may all affect the degree of imperfection that is measured.

Note 1—The substrate exposed by the pores may be the basis metal, an underplate, or both.

4.2 The tests in this guide involve corrosion reactions in which the products delineate pores in coatings. Since the chemistry and properties of these products may not resemble those found in service environments, these tests are not recommended for prediction of product performance unless correlation is first established with service experience.

1.1 This guide describes some of the available standard methods for the detection, identification, and measurement of porosity and gross defects in electrodeposited and related metallic coatings and provides some laboratory-type evaluations and acceptances. Some applications of the test methods are tabulated in Table 1 and Table 2.

TABLE 1 Applications of Standard Porosity Tests to Metallic Coatings (Section 6)

Substrate MetalA

Gold

Silver

Nickel

Tin-Nickel

Tin

Tin-Lead

Copper

Pallad......

ASTM B765-03(2013) Referenced Document

  • ASTM B276 Standard Test Method for Apparent Porosity in Cemented Carbides
  • ASTM B374 Standard Terminology Relating to Electroplating
  • ASTM B537 Standard Practice for Rating of Electroplated Panels Subjected to Atmospheric Exposure
  • ASTM B542 Standard Terminology Relating to Electrical Contacts and Their Use
  • ASTM B545 Standard Specification for Electrodeposited Coatings of Tin
  • ASTM B605 Standard Specification for Electrodeposited Coatings of Tin-Nickel Alloy
  • ASTM B650 Standard Specification for Electrodeposited Engineering Chromium Coatings on Ferrous Substrates
  • ASTM B689 Standard Specification for Electroplated Engineering Nickel Coatings
  • ASTM B733 Standard Specification for Autocatalytic (Electroless) Nickel-Phosphorus Coatings on Metal
  • ASTM B734 Standard Specification for Electrodeposited Copper for Engineering Uses
  • ASTM B735 Standard Test Method for Porosity in Gold Coatings on Metal Substrates by Nitric Acid Vapor
  • ASTM B741 Standard Test Method for Porosity In Gold Coatings On Metal Substrates By Paper Electrography
  • ASTM B798 Standard Test Method for Porosity in Gold or Palladium Coatings on Metal Substrates by Gel-Bulk Electrography
  • ASTM B799 Standard Test Method for Porosity in Gold and Palladium Coatings by Sulfurous Acid/Sulfur-Dioxide Vapor
  • ASTM B809 Standard Test Method for Porosity in Metallic Coatings by Humid Sulfur Vapor ("Flowers-of-Sulfur")*， 2024-04-20 Update
  • ASTM B866 Standard Test Method for Gross Defects and Mechanical Damage in Metallic Coatings by Polysulfide Immersion
  • ASTM B877 Standard Test Method for Gross Defects and Mechanical Damage in Metallic Coatings by the Phosphomolybdic Acid (PMA) Method

ASTM B765-03(2013) history

  • 2023 ASTM B765-03(2023) Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings
  • 2018 ASTM B765-03(2018) Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings
  • 2003 ASTM B765-03(2013) Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings
  • 2003 ASTM B765-03(2008) Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings
  • 2003 ASTM B765-03 Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings
  • 1993 ASTM B765-93(2001) Standard Guide for Selection of Porosity Tests for Electrodeposits and Related Metallic Coatings
  • 1993 ASTM B765-93(1997) Standard Guide for Selection of Porosity Tests for Electrodeposits and Related Metallic Coatings
Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings


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