Standard Number:  AS 4169-1994

Title:  Electroplated coatings - Tin and tin alloys

Language:  English

Replaced by Standard:  AS 4169-2004 electroplated coatings - tin and tin alloys

Replacing Standard:  AS K141-1966 electroplated coatings of tin

Publication Date:  1993/10/27

Execute Date:  1994/1/17

Revocatory Date:  2000/1/1

Adopted International Standard:  ISO 2093-1986 Electroplated coatings of tin; Specification and test methods Identical

Status:  Withdrawn

Standard Type:  

Publisher:  Australia Standards(AS)

Price:  

Number of Pages:8P.;A4  

Preface:  

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.  

Overview:  

Cross References:  

Catalog:Document Contents
AS 4169:1994 ELECTROPLATED COATINGS - TIN AND TIN ALLOYS
PREFACE
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