DEFSTAN 03-40/1(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Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Hardcopy , PDF
31-03-2014
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-nickel 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-nickel
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-Nickel 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-Nickel Electrodeposition
A.3.1 Basis Materials
A.3.2 Hydrogen embrittlement
A.3.3 Zinc-nickel 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-nickel electrodeposits
Annex B - Zinc-Nickel Electrodeposition Process
B.1 General
B.2 Electrodeposition Solution and Conditions for the
Production of a Deposit Containing to 15% Nickel from
an Alkaline Bath
B.2.2 Anodes
B.3 The Analysis of Zinc-Nickel Electrodeposition Solution
B.3.2 Analysis of main constituents of alkaline
zinc-nickel electrodeposition solution
B.3.2.1 Analysis of zinc, sodium hydroxide, sodium
carbonate
B.3.2.2 Analysis of nickel
Annex C - Determination of Average Thickness of Zinc-Nickel
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
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