AS 1901-1993

1 - AS 1901- 1993 ELECTROPLATED COATINGS - GOLD AND GOLD ALLOYS
4 - PREFACE
4 - CONTENTS
5 - FOREWORD
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
7 - 3 DEFINITIONS
7 - 3.1 Finished state
7 - 3.2 Gold alloy coating
7 - 3.3 Gold coating
7 - 3.4 Multilayer gold coating
7 - 3.5 Significant surface
7 - 3.6 Strike
7 - 4 DESIGNATION
8 - 5 DESIGN AND CONDITION OF ITEMS BEFORE COATING
8 - 5.1 Design
8 - 5.2 Surface finish
8 - 5.3 Preplating condition
8 - 6 REQUIREMENTS FOR UNDERCOATS
8 - 7 REQUIREMENTS FOR GOLD COATINGS
8 - 7.1 General
8 - 7.2 Appearance
9 - 7.3 Thickness of coating
10 - 7.4 Gold content
10 - 7.5 Adhesion
10 - 7.6 Electrical properties
10 - 7.7 Hardness
10 - 7.8 Freedom from porosity
11 - 8 TEST SPECIMENS
11 - 9 POST-PLATING HEAT TREATMENT
11 - 10 MARKING
12 - PURCHASING GUIDELINES
12 - A1 GENERAL
12 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
13 - TYPICAL APPLICATIONS FOR ELECTROPLATED COATINGS OF GOLD
13 - B1 SCOPE
13 - B2 TYPICAL APPLICATIONS

Specifies requirements for electroplated coatings of gold and gold alloys 0.5 µm and greater in thickness on metallic materials for decorative, electrical, electronic and general engineering applications. It does not apply to coatings on screw threads, or metals in the unfabricated form.

This Standard specifies requirements for electroplated coatings of gold and gold alloys 0.5 mm and greater in thickness on metallic materials for decorative, electrical, electronic, protective and general engineering applications. It does not apply to coatings on screw threads, sheet, strip and wire in the unfabricated form, or to those coatings less than 0.5 mm thick, commonly called 'flash coatings'.NOTES:1 The purity requirements for gold coatings for engineering applications differ from those required for decorative purposes (see Clause 7.4).2 Advice and recommendations on information to be supplied by the purchaser at the time of enquiry and order are contained in the purchasing guidelines set out in Appendix A.3 Typical applications for electroplated gold coatings are given in Appendix B.

First published in part as AS K158-1967.
Revised and redesignated AS 1901-1976.
AS 1902 first published 1976.
AS 1901-1976 and AS 1902-1976 revised, amalgamated and designated AS 1901-1993.