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Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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
31-03-2014
English
01-01-2008
Important note : Users cannot be edited or removed once added to your Multi user PDF.
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
Provides guidance for, and specifies the requirements for, the electrodeposition of zinc-cobalt alloy coatings on a range of metallic substrates for the provision of corrosion resistance to steel components and galvanic compatibility between some bi-metallic contacting surfaces.
| DevelopmentNote |
This standard is obsolescent because it is no longer required for the procurement of new equipment but is retained for maintenance purposes in support of existing in-service equipment. (05/2013)
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
UK Ministry of Defence Standards
|
| Status |
Withdrawn
|
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| BS EN ISO 2177:2004 | Metallic coatings. Measurement of coating thickness. Coulometric method by anodic dissolution |
| DEFSTAN 03-38/1(2007) : 2007 | GUIDANCE FOR THE USE OF ALTERNATIVES TO HEXAVALENT CHROMIUM FOR THE PROTECTIVE COATING OF DEFENCE EQUIPMENT |
| DEFSTAN 03-2/4(2005) : 2005 | CLEANING AND PREPARATION OF METAL SURFACES |
| BS EN ISO 1463:2004 | Metallic and oxide coatings. Measurement of coating thickness. Microscopical method |
| BS EN ISO 2360:2017 | Non-conductive coatings on non-magnetic electrically conductive base metals. Measurement of coating thickness. Amplitude-sensitive eddy-current method |
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