The "DIN EN ISO 15720-2001 Metal platings porosity test, porosity of gold or palladium platings on metal substrates Gel Density anode electrolysis platings porosity" standard specifies a test method for determining the porosity of gold or palladium metal platings. This method uses gel Density anode electrolysis technology to measure the porosity of metal platings by electrolysis treatment to assess the density and mass of platings. This standard applies to gold or palladium platings on metal substrates and is widely used for platings quality control and production process monitoring. The standard details the test procedures, reagent requirements, equipment settings and other technical details to help ensure the reliability and protective performance of coatings in different applications.