GB/T 18179-2000 (English Version) Metallic coatings-Porosity tests-Humid sulfur(flowers of sulfur) test

Standard No.: GB/T 18179-2000
Language: Chinese, Available in English version
Release Date: 2000
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 18179-2000

Scope: This International Standard specifies a method for revealing discontinuities and porosity in metallic coatings that extend through a single or multiple coatings to a silver, copper, or copper alloy substrate. This method is especially suitable for various single-layer or composite-layer coatings that do not change color significantly in a reducing sulfur atmosphere, such as: gold, nickel, tin, tin-lead, palladium and their alloys. The purpose of this test method is to show whether the overburden complies with the requirements for an acceptable porosity level as determined by the user. The specified value of porosity is generally determined by the user according to the acceptable level of the intended application and by experience. For an up-to-date review of porosity tests and test methods see references [1], [2] in Appendix B (reminder). For general guidelines on porosity testing of metal and other inorganic coatings, see GB/T 17720 "Review of Porosity Testing of Metallic Coverings"

GB/T 18179-2000 history

2000 GB/T 18179-2000 Metallic coatings-Porosity tests-Humid sulfur(flowers of sulfur) test