Corrosion Inhibiting Coating Based on Cerium Oxide and a Catecholic Polymer

Abstract

A method for prevention of corrosion of a metal object comprises applying a coating to the metal object. Thee coating comprises at least one cerium oxide and at least one polymer. The at least one polymer comprises at least one catecholic component covalently bound thereto and displays a net positive charge at a pH of 7.

What is claimed is: 
     
         1 . A method for prevention of corrosion of a metal object, comprising applying a coating to the metal object, the coating comprising at least one cerium oxide and at least one polymer, wherein the at least one polymer comprises at least one catecholic component covalently bound thereto, and wherein the at least one polymer displays a net positive charge at a pH of 7. 
     
     
         2 . The method according to  claim 1 , wherein the at least one cerium oxide is CeO 2 . 
     
     
         3 . The method according to  claim 1 , wherein the at least one cerium oxide is in the form of particles with a diameter of 1-1000 nm. 
     
     
         4 . The method according to  claim 1 , wherein the at least one cathecholic component is at least one selected from DOPA (L-3,4-dihydroxyphenylalanine), and a DOPA derivative. 
     
     
         5 . The method according to  claim 1 , wherein the at least one polymer comprises at least 2 wt % based on the molecular weight Mw of at least one moiety selected from DOPA (L-3,4-dihydroxyphenylalanine), and a DOPA-derivative. 
     
     
         6 . The method according to  claim 1 , wherein 6-30 wt % of the polymer based on the molecular weight Mw are at least one moiety selected from DOPA (L-3,4-dihydroxyphenylalanine), and a DOPA-derivative. 
     
     
         7 . The method according to  claim 1 , wherein the at least one polymer is at least one polypeptide extracted from a byssus-forming mussel. 
     
     
         8 . The method according to  claim 1 , wherein the at least one polymer is a polypeptide comprising 30-3000 amino acid residues and tandemly linked peptide repeats comprising 3-15 amino acid residues each. 
     
     
         9 . The method according to  claim 1 , wherein the at least one polymer is a mussel adhesive protein. 
     
     
         10 . The method according to  claim 1 , wherein the polymer is at least one protein selected from the group consisting of MEFP-1, MEFP-2, MEFP-3, MEFP-4, and MEFP-5. 
     
     
         11 . The method according to  claim 1 , wherein the polymer is oxidized. 
     
     
         12 . The method according to  claim 1 , wherein the coating comprises at least one layer comprising the at least one polymer, and wherein the coating further comprises at least one layer comprising the at least one cerium oxide. 
     
     
         13 . The method according to  claim 1 , wherein the coating is at least partially applied to an object comprising carbon steel. 
     
     
         14 . The method according to  claim 1 , wherein the coating comprises dihydrogen phosphate.