A polymer-metal junction comprising: a polymer composition disposed over a surface of a metal substrate and an adhesive composition disposed between the polymer composition and the metal surface and in contact with the polymer composition and the surface of the metal substrate, wherein the polymer composition comprises a first poly(aryl ether ketone) [PAEK2] and wherein the adhesive composition comprises a poly(aryl ether), wherein the poly(aryl ether) is a poly(aryl ether sulfone) or a second poly(aryl ether ketone) [PAEK1], wherein if the adhesive composition comprises one or more PAEK1 polymers, (i) the one or more PAEK2 polymers are distinct from the one or more PAEK1 polymers; or (ii) at least one of the one or more PAEK1 polymers and at least one of the one or more PAEK2 polymers are distinct; and wherein PAEK1 refers to a polymer including at least 50 wt% of recurring units (R PAEK) selected from the group consisting of the units of formulae (J-A) to (J-Q) below: and wherein - each of R', equal to or different from each other, is selected from the group consisting of halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; and wherien j' is zero or is an integer from 0 to 4 and - T is selected from the group consisting of a bond, -CH 2 -; -O-; -SO 2 -; -S-; -C -; -C(CH 3) 2 -;-C(CF 3) 2 -; -C(=CCl 2)-; -C(CH 3)(CH 2 CH 2 COOH)-; -N=N-; -R a C=CR b -, where each R a and R b, independently of one another, is a hydrogen or a C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy, or C 6 -C 18 -aryl group; -(CH 2) n - and -(CF 2) n - with n being an integer from 1 to 6; an aliphatic divalent group, linear or branched, of up to 6 carbon atoms; and combinations thereof. a polymer composition disposed over a surface of a metal substrate and an adhesive composition disposed between the polymer composition and the metal surface and in contact with the polymer composition and the surface of the metal substrate, wherein the polymer composition comprises a first poly(aryl ether ketone) [PAEK2] and wherein the adhesive composition comprises a poly(aryl ether), wherein the poly(aryl ether) is a poly(aryl ether sulfone) or a second poly(aryl ether ketone) [PAEK1], wherein if the adhesive composition comprises one or more PAEK1 polymers, (i) the one or more PAEK2 polymers are distinct from the one or more PAEK1 polymers; or (ii) at least one of the one or more PAEK1 polymers and at least one of the one or more PAEK2 polymers are distinct; (i) the one or more PAEK2 polymers are distinct from the one or more PAEK1 polymers; or (ii) at least one of the one or more PAEK1 polymers and at least one of the one or more PAEK2 polymers are distinct; and wherein PAEK1 refers to a polymer including at least 50 wt% of recurring units (R PAEK) selected from the group consisting of the units of formulae (J-A) to (J-Q) below: and wherein - each of R', equal to or different from each other, is selected from the group consisting of halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; and wherien j' is zero or is an integer from 0 to 4 and - T is selected from the group consisting of a bond, -CH 2 -; -O-; -SO 2 -; -S-; -C -; -C(CH 3) 2 -;-C(CF 3) 2 -; -C(=CCl 2)-; -C(CH 3)(CH 2 CH 2 COOH)-; -N=N-; -R a C=CR b -, where each R a and R b, independently of one another, is a hydrogen or a C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy, or C 6 -C 18 -aryl group; -(CH 2) n - and -(CF 2) n - with n being an integer from 1 to 6; an aliphatic divalent group, linear or branched, of up to 6 carbon atoms; and combinations thereof. - each of R', equal to or different from each other, is selected from the group consisting of halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; and wherien j' is zero or is an integer from 0 to 4 and - T is selected from the group consisting of a bond, -CH 2 -; -O-; -SO 2 -; -S-; -C -; -C(CH 3) 2 -;-C(CF 3) 2 -; -C(=CCl 2)-; -C(CH 3)(CH 2 CH 2 COOH)-; -N=N-; -R a C=CR b -, where each R a and R b, independently of one another, is a hydrogen or a C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy, or C 6 -C 18 -aryl group; -(CH 2) n - and -(CF 2) n - with n being an integer from 1 to 6; an aliphatic divalent group, linear or branched, of up to 6 carbon atoms; and combinations thereof.