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BS EN 4729:2017

BS EN 4729:2017

$102.76

Aerospace series. Trivalent chromium based chemical conversion coatings for aluminium and aluminium alloys

Published By Publication Date Number of Pages
BSI 2017 16
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This European Standard specifies trivalent chromium based chemical conversion coatings for aluminium and aluminium alloys. It covers the application by bath but also by touch-up. It doesn’t give complete in house process instructions; these shall be given in the manufacturers detailed process instructions.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 1 Scope
2 Purpose of process
3 Normative references
4 Terms and definitions
7 5 Applicability and limitations of the process
6 Classification
6.1 Coating weight
6.2 Materials
7 Requirements
7.1 Process requirements
7.1.1 Information for the processor
8 7.1.2 Condition of parts prior to processing
7.1.3 Pre-treatment
9 7.1.4 Rinsings
7.1.5 Treatment
7.1.6 Post-treatment
10 7.1.7 Removal of the coating
8 Main technical engineering requirements
8.1 General
8.2 Appearance
8.3 Coating weight
11 8.4 Corrosion resistance
8.5 Adhesion
8.6 Electrical contact resistance
12 9 Quality requirements
9.1 Approval of the processor
9.2 Process approval
9.3 General points
9.4 Periodic tests
13 9.5 Periodic chemical analysis
9.6 Parts acceptance inspections
9.6.1 Inspections before treatment
9.6.2 Inspections during treatment
9.6.3 Inspections after treatment
14 9.7 Test specimen
9.8 Baths
10 Quality assurance
10.1 Approval of the processor
10.2 Series production approval
10.3 Acceptance
11 Health, safety and environmental aspects
15 12 Designation

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BS EN 4729:2017
$102.76