Draft DIN Standard for Chromium(VI)-Free Passivation of Aluminum Published
The draft standard E DIN 50935-2, “Chromium(VI)-Free Passivation of Nonferrous Metals—Part 2: Aluminum and Aluminum Alloys,” was published with an issue date of August 2026. The deadline for comments is September 3, 2026.
E DIN 50935-2 specifies the performance characteristics of conversion coatings on aluminum or aluminum alloys. This document does not apply to coatings produced by anodic oxidation. It specifies the designations for the coating systems described. Performance characteristics include: corrosion resistance, electrical conductivity, overcoatability, bondability, and vulcanizability.
DIN Draft Standard E DIN 50935-2 Open for Comment
As DIN emphasizes, the materials, work processes, and testing equipment described in the standard may pose health hazards if proper precautions are not taken. It cannot be assumed that this standard covers all safety issues that may arise during its application. Users of this standard are responsible for taking appropriate measures to ensure safety, protect health, and safeguard the environment before applying the standard, as well as for complying with applicable legal regulations. This document was developed by the NA 062-02-105 AA Working Group “Chemical and Electrochemical Coatings” of the DIN Standards Committee for Materials Testing (NMP) and is available from DIN Media GmbH, 10772 Berlin. Comments on the draft standard can be submitted via the draft standards portal until September 3, 2026.
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