DEFSTAN 03-39/1(2008) : 2008
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
ELECTRODEPOSITION OF ZINC-COBALT ALLOYS
Hardcopy , PDF
03-31-2014
English
01-01-2008
Foreword
Introduction
1 Scope
2 Warning
3 Normative References
4 Abbreviations
5 Definitions
5.2 Process control schedule
5.3 Significant surface
5.4 Shot peening
5.5 Tensile strength of steels
5.5.2 Tensile strength/hardness relationship
6 Information to be Supplied by the Purchaser
7 Process Control
8 Process Requirements
8.1 Ferrous substrates
8.1.1 General
8.1.2 Heat treatment
8.1.3 Surface preparation
8.1.3.1 General requirements
8.1.3.2 Cleaning
8.1.3.3 Masking
8.1.3.4 Activation
8.1.4 Zinc-cobalt electrodeposition process
8.1.4.3 Coating composition
8.1.4.4 Coating thickness
8.1.5 Washing
8.1.6 Passivation
8.1.7 Post treatment
8.1.8 Post-electrodeposition heat treatment
8.2 Non-ferrous substrates
8.2.1 Preparation for electrodeposition
8.2.2 Electrodeposition of zinc-cobalt
8.2.3 Post-electrodeposition treatment
9 Inspection and Test
9.1 General procedure
9.2 Selection of test samples
9.3 Visual inspection
9.4 Adhesion
9.5 Thickness of coating
9.5.2 Local thickness
9.5.3 Average thickness
9.6 Salt spray test
9.7 Composition of coating
9.8 Treatment of items rejected during final inspection
and test
Annex A - Guidance on Zinc-Cobalt Electrodeposition
A.1 Introduction
A.2 Zinc Base Alloys
A.2.1 General
A.2.2 Corrosion behaviour of zinc alloy electrodeposits
on steel
A.3 Zinc-Cobalt ElectroDeposition
A.3.1 Basis Materials
A.3.2 Hydrogen embrittlement
A.3.3 Zinc-cobalt electrodeposition solutions
A.3.3.2 Acid electrodeposition baths
A.3.3.3 Alkaline electrodeposition baths
A.3.4 Process control
A.3.5 Corrosion behaviour of zinc-cobalt electrodeposits
Annex B - Zinc-Cobalt Electrodeposition Process
B.1 General
B.2 Electrodeposition Solution and Conditions Using an
Alkaline Bath
B.3 The Analysis of Zinc-Cobalt Electrodeposition Solution
B.3.2 Analysis of main constituents of alkaline zinc-cobalt
electrodeposition solution
B.3.2.1 Analysis of zinc and sodium hydroxide
B.3.2.2 Analysis of cobalt and iron
Annex C - Determination of Average Thickness of Zinc-Cobalt Coating
C.1 Solution
C.2 Method
C.3 Calculation
Annex D - Adhesion Tests
D.1 Burnishing Test
D.2 Bend Test
D.3 Scribe Test
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.