International Organization for Standardization (ISO)
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ISO 12687:1996
Scope
Specifies a method of revealing discontinuities and porosity in metallic coatings, where they penetrate the coating layer down to a substrate. Especially useful for coatings consisting of single or combined layers.
ISO 12687:1996 history
1996ISO 12687:1996 Metallic coatings - Porosity tests - Humid sulfur (flowers of sulfur) test