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AS 4169-1994 Electroplated coatings - Tin and tin alloys

Standard Number:  AS 4169-1994
Title:  Electroplated coatings - Tin and tin alloys
Language:  English
Publication Date:  1993/10/27
Execute Date:  1994/1/17
Status:  Withdrawn
International Classification for Standards (ICS)MANUFACTURING ENGINEERING>>Surface treatment and coating>>Metallic coatings
Publisher:  Australia Standards(AS)
Number of Pages:8P.;A4  

Description:Specifies requirements for electroplated coatings of tin on fabricated metal articles to protect them from corrosion and to facilitate soldering. Appendices contain test methods and give advice on the properties of tin coatings and electroplating practice. This Standard is technically identical with, and has been reproduced from, ISO 2093-1986 Electroplated coatings of tin; Specification and test methods.  
Catalog:Document Contents
0 Introduction
1 Scope and field of application
2 References
3 Definitions
4 Information to be supplied by the purchaser to the electroplater
4.1 Essential information
4.2 Additi onal information
5 Basis material
6 Sampling
7.1 Service condition number
7.2 Coating classification code
8 Heat treatment of steel
8.1 Stress relief before electroplating
8.2 Hydrogen embrittlement relief after electroplating
9 Requirements for undercoats
10 Requirements for coatings
10.1 Appearance
10.2 Thickness
10.3 Adhesion
10.4 Porosity
10.5 Solderabilit y
10.5.1 General materials and piece parts
10.5.2 Printed circuit boards
Annex A - Determination of coating thickness
A.0 Introductory notes
A.0.1 Routine methods
A.0.2 Referee methods
A.1 Measurement of local thickness
A.1.1 Microscopical method
A.1.2 Coulometric method
A.1.3 Beta backscatter method
A.1.4 X-ray spectrometric method
A.2 Measurement of average thickness
A.2.1 Principle
A.2.2 Reagents
A.2.3 Test specimen
A.2.4 Procedure
Annex B - Adhesion tests
B.1 Burnishing test
B.2 Bend test
B.3 Thermal shock test
Annex C - Guidance notes
C.1 Properties of the coating
C.1.1 General
C.1.2 Whisker growth
C.1.3 Allotropic changes
C.2 Properties and preparation of the basis material
C.2.1 Surface condition
C.2.2 Formation of intermetallic compounds
C.2.3 Diffusion of zinc
C.2.4 ?Difficult? basis materials
C.2.5 Aluminium, magnesiumand zinc alloys
C.3 Electroplating practice
C.3.1 Post-electroplating rinse
C.3.2 Coating thickness requirements
C.3.3 Co-deposition of organic matter
C.4 Flow-melting
C.5 Tin coatings in contact with food
C.5.1 Organic brighteners
C.5.2 Tin content
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  622KB
Tile in English:  Electroplated coatings - Tin and tin alloys

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