The standard specifies the required characteristics for the performance of sulphuric acid anodizing with or without sealing as well as quality assurance of the coating obtained.
DIN EN 2284:1991 history
1991DIN EN 2284:1991-08 Aerospace series; sulphuric acid anodizing of aluminium and wrougth aluminium alloys; german version EN 2284:1991
1991DIN EN 2284:1991 Aerospace series; sulphuric acid anodizing of aluminium and wrougth aluminium alloys; german version EN 2284:1991