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CEN - EN 4729

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

active, Most Current
Organization: CEN
Publication Date: 1 September 2017
Status: active
Page Count: 18
ICS Code (Other treatments and coatings): 25.220.99
scope:

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.

Purpose of process

The aim of the trivalent chromium based chemical conversion coatings is to increase corrosion resistance, to improve the adhesion of paints and varnishes and to ensure electrical conductivity. Coatings are also suitable for the repair of mechanically damaged anodic coatings.

Document History

EN 4729
September 1, 2017
Aerospace series - Trivalent chromium based chemical conversion coatings for aluminium and aluminium alloys
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...

References

This document references:
EN 4707 - Aerospace series - Acid pickling of aluminium and aluminium alloys without hexavalent chromium
Published by CEN on January 1, 2020
This document specifies the acid pickling of aluminium and aluminium alloys free from hexavalent chromium.
This document references:
EN 9100 - Quality Management Systems - Requirements for Aviation, Space and Defence Organizations
Published by CEN on May 1, 2018
This document includes EN ISO 9001:20152 quality management system requirements and specifies additional aviation, space and defence industry requirements, definitions and notes. It is emphasized...
This document references:
EN ISO 2409 - Paints and varnishes - Cross-cut test
Published by CEN on September 1, 2020
This document specifies a test method for assessing the resistance of paint coatings and varnishes (including wood stains) to separation from substrates when a right-angle lattice pattern is cut into...
This document references:
EN ISO 2812-2 - Paints and varnishes - Determination of resistance to liquids - Part 2: Water immersion method
Published by CEN on December 1, 2018
This document specifies a method for determining the resistance of an individual-layer or multi-layer system of coating materials to the effects of water by partial or full immersion. This method...
This document references:
EN ISO 3892 - Conversion Coatings on Metallic Materials - Determination of Coating Mass Per Unit Area - Gravimetric Methods
Published by CEN on July 1, 2001
A description is not available for this item.
This document is referenced by:
ASD-STAN PREN 3837 - Aerospace series Paints and varnishes Nature and method for surface preparation of test pieces in aluminium alloys
Published by ASD-STAN on March 1, 2018
This standard defines the nature of and the surface preparation method for test pieces in aluminium alloys intended for testing paints and varnishes used for aerospace applications.
This document is referenced by:
BS EN 3837 - Aerospace series — Paints and varnishes — Nature and method for surface preparation of test pieces in aluminium alloys
Published by BSI on September 30, 2019
A description is not available for this item.
This document is referenced by:
EN 3837 - Aerospace series — Paints and varnishes — Nature and method for surface preparation of test pieces in aluminium alloys
Published by CEN on August 1, 2019
This document defines the nature of and the surface preparation method for test pieces in aluminium alloys intended for testing paints and varnishes used for aerospace applications.
This document is referenced by:
EN 2535 - Aerospace series - Vacuum deposition of cadmium
Published by CEN on June 1, 2011
This European Standard defines the method for depositing cadmium layers according to the vacuum deposition process, for use in aerospace construction. According to this process, cadmium metal is...
This document is referenced by:
BS EN 2535 - Aerospace series - Vacuum deposition of cadmium
Published by BSI on July 31, 2011
A description is not available for this item.
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