NP EN 12373-6-2001 Aluminium and aluminium alloys Anodizing Part 6:Assessment of quality of sealed anodic oxidation coatings by measurement of the loss after immersion in phosphoric acid/chromic acid solution without prior acid treatment
2002NP EN 12373-6-2001 Aluminium and aluminium alloys Anodizing Part 6:Assessment of quality of sealed anodic oxidation coatings by measurement of the loss after immersion in phosphoric acid/chromic acid solution without prior acid treatment