AENOR UNE-EN ISO 14647:2016 Metal coatings. Determination of porosity in gold coatings on metallic substrates. Nitric acid vapor test. (ISO 14647:2000).
2016AENOR UNE-EN ISO 14647:2016 Metal coatings. Determination of porosity in gold coatings on metallic substrates. Nitric acid vapor test. (ISO 14647:2000).