Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings

Importancia y uso:

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.

Subcomité:

B08.10

Referida por:

B0809-95R18, B0488-18, B0877-96R18, B0827-05R20, B0545-22, B0679-98R21, B0735-16R22, B0798-95R20, B0605-22, B0689-97R23, B0734-97R23, B0920-16R22, B0984-12R20E01, B0867-95R23, B0866-95R18, B0799-95R20

Volúmen:

02.05

Número ICS:

25.220.40 (Metallic coatings)

Palabras clave:

electrodeposits; gross defect; mechanical damage; metallic coatings; porosity; porosity testing; wear-through;