Method for separating cropped layers from plated strips by roll bonding

Process for the manufacture of an aluminum plated strip comprising at least two plating layers of two different aluminum alloys, said process comprising:

• preparing plates corresponding to each plating layer,
• superimposing and assembling said plates to form a composite plate,
• prior to superimposing the plates, applying an anti-sticking agent to cropping areas of at least one surface of each plate which will be in contact with a surface of another one of the plates, wherein said anti-sticking agent comprises a mixture of a mineral powder and a silicon resin in suspension in water or in an organic solution, wherein the inclusion of said anti-sticking agent allows the subsequent separation of the cropped layers resulting from shearing the plated strip,
• hot and optionally cold rolling of said composite plate to obtain a plated strip,
• shearing cropping areas of each of said plates during or after rolling, and
• separately recycling the cropping layers resulting from shearing the plated strip.