This document specifies the principles, symbols and test methods for chromating aluminium.#,,#
DIN 50939:1996 history
2007DIN EN 12487:2007 Corrosion protection of metals - Rinsed and non-rinsed chromate conversion coatings on aluminium and aluminium alloys; English version of DIN EN 12487:2007-07
1996DIN 50939:1996 Corrosion protection - Chromating of aluminium - Principles and methods of test