NF A92-131-2009 Enamel and enamel for aluminium - Determination of adhesion of aluminium overlay under electrolysis (flaking test) specifies a test method for determining adhesion of enamel and enamel layers on aluminium substrates. This standard assesses the adhesion strength between the ceramic layer and the aluminium surface by flaking tests in electrolysis solutions to help detect corrosion resistance and long-term stability. This method is suitable for quality control of enamel and enamel coated on aluminium products, especially aluminium-based coatings that require good adhesion in harsh environments. The implementation of this standard ensures that aluminum products have high durability and performance during use, especially in applications in chemical corrosion or humid environments.