Amphiphilic copolymer-based protective coating composition for metal surfaces

A protective coating composition for a metal surface, wherein the composition comprises:

• a) 0.01 wt % and 10 wt % of an amphiphilic copolymer based on the weight of the overall coating composition, the amphiphilic copolymer comprising:
• i. repeating monomeric units comprising a pendant group comprising a polyfluoropolyether group;
• ii. first repeating monomeric units comprising a first pendant group comprising a first polar functional group selected from the group consisting of carboxylate groups, hydroxyl groups, and any combinations or salts thereof;
• iii. optionally, second repeating monomeric units comprising a second pendant group comprising a second polar functional group selected from the group consisting of carboxylate groups, hydroxyl groups, and any combinations or salts thereof;
• wherein the repeating monomeric units of the amphiphilic copolymer independently comprise an ethylenically unsaturated polymerizable group selected from the group of (meth)acrylate ester containing groups, and wherein the second repeating monomeric units are different from the first repeating monomeric units;
• b) a solvent mixture comprising water and an organic solvent;
• and
• c) optionally, a metal salt.