This standard BS EN 4729:2017 Aerospace series. Trivalent chromium based chemical conversion coatings for aluminium and aluminium alloys is classified in these ICS categories:
25.220.99 Other treatments and coatings
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.
