EN ISO 4524-3:1995
(Main)Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3: Electrographic tests for porosity (ISO 4524-3:1985)
Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3: Electrographic tests for porosity (ISO 4524-3:1985)
Specifies five electrographic tests for assessing the porosity of these gold and gold alloy coatings for engineering, and decorative and protective purposes. The methods are: cadmium sulfide paper test, nioxime paper test, dye-transfer paper test 1 and 2, and electrographic gelatine film test.
Metallische Überzüge - Prüfverfahren für elektrolytisch abgeschiedene Überzüge aus Gold und Goldlegierungen - Teil 3: Elektrographische Prüfungen auf Porosität (ISO 4524-3:1985)
Dieser Teil von ISO 4524 legt fünf elektrografische Prüfungen zur Beurteilung der Porosität elektrolytisch abgeschiedener Überzüge aus Gold und Goldlegierungen für technische, dekorative und schützende Anwendungen fest.
Revêtements métalliques - Méthodes d'essai des dépôts électrolytiques d'or et d'alliages d'or - Partie 3: Détermination électrographique de la porosité (ISO 4524-3:1985)
La présente partie de l'ISO 4524 décrit cinq essais électrographiques pour déterminer la porosité des dépôts électrolytiques d'or et d'alliages d'or pour utilisation dans l'industrie, la décoration et la protection.
Kovinske prevleke - Preskusne metode za galvansko nanašanje zlata in njegovih zlitin - 3. del: Elektrografsko ugotavljanje poroznosti (ISO 4524-3:1985)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kovinske prevleke - Preskusne metode za galvansko nanašanje zlata in njegovih zlitin - 3. del: Elektrografsko ugotavljanje poroznosti (ISO 4524-3:1985)Metallische Überzüge - Prüfverfahren für elektrolytisch abgeschiedene Überzüge aus Gold und Goldlegierungen - Teil 3: Elektrographische Prüfungen auf Porosität (ISO 4524-3:1985)Revetements métalliques - Méthodes d'essai des dépôts électrolytiques d'or et d'alliages d'or - Partie 3: Détermination électrographique de la porosité (ISO 4524-3:1985)Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3: Electrographic tests for porosity (ISO 4524-3:1985)25.220.40Kovinske prevlekeMetallic coatingsICS:Ta slovenski standard je istoveten z:EN ISO 4524-3:1995SIST EN ISO 4524-3:1999en01-oktober-1999SIST EN ISO 4524-3:1999SLOVENSKI
STANDARD
International Standard 452413 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME~~YHAPO~HAR OPTAHM3A~MR fl0 CTAHAAPTM3A~MM.ORGANlSATlON INTERNATIONALE DE NORMALISATION Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3 : Electrographit tests for porosity Revetemen ts m&alliques - Mbthodes d’essai des d@Ots electrolytiques d’or et Nalliages d’or - Partie 3 : Determination t%ectrographique de Ia porositt5 First edition - 1985-04-01 Corrected and reprinted - 1986-03-01 UDC 669.218.7 : 620.192.47 Ref. No. ISO 4524/3-1985 (E) F & Descriptors : coatings, metal coatings, electrodeposited coatings, gold plating, decorative coatings, protective coatings, tests, determination, 2 porosity. M ’ Price based on 3 pages SIST EN ISO 4524-3:1999
Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 4524/3 was prepared by Technical Committee ISO/TC 107, Metallic and other non-organic coatings. @ International Organkation for Standardkation, 1985 l Printed in Switzerland SIST EN ISO 4524-3:1999
INTERNATIONAL STANDARD ISO 4524/3-1985 (E) Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3 : Electrographit tests for porosity 1 Scope and field of application This part of ISO 4524 specifies five electrographic tests for assessing the porosity of electrodeposited gold and gold alloy coatings for engineering, and decorative and protective purposes. 2 Cadmium sulfide Paper test 2.1 Applicability This method is suitable for the examination of gold coatings on topper. 2.2 Materials During the test, unless otherwise stated, use only reagents of recognized analytical grade and only distilled water or water of equivalent purity. 2.2.1 Cadmium sulfide Paper. Use filter or duplicating Paper of adequate wet strength, with a texture that will produce sharp and uniform electrograms. Soak the Paper for 10 min in a fresh 10 % (mlm) Solution of cad- mium chloride hemipentahydrate (CdCl,.2,5 H20) containing 0,l % (VlV) of hydrochloric acid (HCI, Q l,16 to 1,18 g/ml). Remove the excess Solution with blotting Paper. Allow the Paper to dry partially and then immerse it in a fresh 50 g/l Solution of sodium sulfide (Na$) for 30 s, after which time the Paper should be a uniform yellow colour (indicating complete precipitation of Cadmium sulfide, CdS). Wash the Paper in running water for approximately 1 h, then hang it up to dry. 2.2.2 Moistened blotting Paper. Soak a good quality white blotting Paper in water and dry it to a degree that consistently produces sharply defined elec- trograms. 2.3 Procedure Lightly brush the electroplated coating to remove loose dust and debris, then degrease it in l,l,l-trichloroethane vapour or other suitable solvent. Place a piece of the Cadmium sulfide Paper on the electroplated specimen (which acts as the anode). On the other face of the Cadmium sulfide Paper, place a piece of the moistened blotting Paper (2.2.2), followed by a high purity clean aluminium or stainless steel platen (which acts as the cathode). Compress the assembly so that the pressure between the Cadmium sulfide Paper and the specimen is uniform and between 1,4 and 1,7 MPa. While under compression, pass a smooth ripple-free d.c. current from a Source not exceeding 12 V. Set the current density initially at 7,5 mA/cm* of anode area and pass for 30 s. Allow the electrogram produced on the Cadmium sulfide Paper to dry. The presence of any defect in the electroplated coating is revealed by a corresponding brown stain on the Paper. NOTE - If an Overall black stain is obtained in this test, either the elec- trolyte content of the Papers or the current density is too high. 3 Nioxime Paper test 3.1 Applicability This method is suitable for the examination of gold coatings on undercoats of nicke1 or tin-nicke1 alloy. 3.2 Materials During the test, use only reagents of recognized anaIyticaI grade and only distilled water or water of equivalent purity. Nioxime Paper. Soak filter or duplicating Paper for IO min in an 8 g/l solution of nioxime (cyclohexan-1,2-dione dioxime). Remove the excess Solution by blotting and hang the Paper up to dry. 1 SIST EN ISO 4524-3:1999
ISO 4524/3-1985 (EI 3.3 Procedure Lightly brush the electroplated coating to remove loose dust and debris, then degrease it in l,l,l -trichloroethane vapour or other suitable solvent. Moisten a piece of the nioxime Paper (3.2) with water. Remove excess water by blotting. Place the treated nioxime Paper on the electroplated specimen (which acts as the anode). On the other face of the nioxime Paper, place a piece of the moistened blotting Paper (2.2.2), followed by a high purity clean aluminium or stainless steel platen (which acts as the cathode). Compress the assembly so that the pressure between the niox- ime Paper and the specimen is uniform and between 1,4 and 1,7 MPa. While under compression, pass a smooth ripple-free d.c. current from a Source not exceeding 12 V. Set the current density initially at 7,5 mA/cm* of anode area and pass for 30 s. Expose the electrogram produced on the nioxime Paper to am- monia vapour and then allow to dry. The presence of any defect in the electroplated coating is revealed by a corre- sponding pink stain on the Paper. When electroplated on cop- per, defects in the nicke1 or tin-nicke1 undercoat are revealed as green stains. 4 Dye-transfer described in clause 2 4.1 Materials P Iaper test 1 (alternative to the test During the test, unless otherwise stated, u
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