THE formation of boehmite on anodized and non-anodized aluminium surfaces by boiling-water treatment has been discussed by Hart 1. He found by electron diffraction study of ammonium borate anodic ...

‘SEALING’ of oxide coatings produced on aluminium and its alloys by anodic treatment in sulphuric acid solutions is the reaction between the amorphous alumina (containing about 15 per cent ...