DEFSTAN 03-25/5(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Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
SULFURIC ACID ANODIZING OF ALUMINIUM AND ALUMINIUM ALLOYS
Hardcopy , PDF
21-05-2015
English
01-01-2008
Foreword
0 Introduction
1 Scope
2 Warning
3 Normative References
4 Definitions
4.2 Batch
4.3 Process Control Schedule
4.4 Purified water
4.5 Significant Surface
5 Information to be Supplied to the Processor
6 Process Control
7 Applications and Limitations
7.1 Applications
7.2 Compatibility with explosives, propellants and
pyrotechnics
7.3 Limitations
8 Process Requirements
8.1 Surface preparation
8.2 Anodizing
8.2.1 Process
8.2.2 Coating thickness
8.3 Washing
8.4 Dyeing
8.5 Sealing
8.6 Drying
8.7 Re-anodizing
9 Inspection and Test
9.1 Processing
9.2 Frequency of testing
9.3 Appearance
9.4 Thickness of coating
9.5 Dyed coatings
9.5.1 Resistance to leaching
9.5.2 Fastness to light
9.6 Sealing assessment
9.7 Electrical insulation
9.8 Abrasion resistance
9.9 Reflectivity
9.10 Corrosion test
Annex A - Sulfuric Acid Anodizing Process for Aluminium and
Aluminium Alloys
A.1 Electrolyte
A.2 Cathode
A.3 Suspension or Jigging
A.4 Anodizing Procedure
Annex B - Analysis of Sulfuric Acid Electrolyte
B.1 Analysis of Sulfuric Acid Electrolyte
B.2 Analysis for Free Sulfuric Acid
B.2.1 Reagents
B.2.2 Procedure
B.2.3 Calculation
B.3 Analysis for Aluminium
B.3.1 Reagents
B.3.2 Procedure
B.3.3 Calculation
B.4 Analysis for Chloride
B.4.1 Reagents
B.4.2 Procedure
B.4.3 Calculation
Annex C - Stripping Solutions for the Removal of Anodic
Coatings
C.1 Preferred Solution
C.2 Alternative Solutions
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