TECHNOLOGY FOCUS - INDUSTRIAL STANDARDS - The friction reducing material is free of observable defects after weathering test such as corrosion test confirming to ISO 9227:2006 standard.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - The surface-upgraded surface has an electrolytically zinc-plated surface. The rigid material contains a material chosen from cold-rolled stainless steel and matt zinc-plated stainless steel.    TECHNOLOGY FOCUS - POLYMERS - The intermediate material comprises at least one functionalized thermoplastic polymer having functional groups of formulae: -C(-CH3)=O, -C(-CH3)2-O-R, -C(-CH3)2OH, -COOH and -COOR (R is 1-20C cyclic or linear organic radical). The functional group is incorporated into thermoplastic polymer by addition of at least one modifying reagent. The modifying agent includes maleic acid, itaconic acid, citraconic acid or their derivatives. The modifying agent contains anhydride of maleic acid, anhydride of itaconic acid and anhydride of citraconic acid. At least one functionalized thermoplastic polymer of intermediate material is a functionalized thermoplastic fluoropolymer. The thermoplastic fluoropolymer includes an ethylene-tetrafluoroethylene copolymer (ETFE), perfluoroalkoxyethylene (PFA) or tetrafluoroethylene-perfluoro(methyl vinyl ether) copolymer (MFA). The thermoplastic fluoropolymer consists of an ethylene-tetrafluoroethylene copolymer (ETFE). The intermediate material further comprises tetrafluoroethylene and a copolymer of perfluoro(alkyl vinyl ether) of formula: CF2=CF-O-R1 (R1 is perfluoroethyl, perfluoro-n-propyl or perfluoro-n-butyl radical). The fibers include a material chosen from glass fibers, carbon fibers and aramid fibers. The thermoplastic material is chosen from polyimide, polyamidimide, polyphenylene sulfide, polyphenylene sulfone, liquid crystal polymer, polyether ether ketone and aromatic polyester. The epoxy resin contains polyglycidylether, diglycidylether, bisphenol A, bisphenol F, oxirane, oxacyclopropane, ethyleneoxide, 1,2-epoxypropane, 2- methyloxirane and 9,10-epoxy-9,10-dihydroanthracene. The epoxy resin further contains hardening agent having amine, acid anhydride, fatty amine compound, polycarbonic anhydride, polyacrylate and encapsulated polyisocyanate. The amine is aliphatic amine, alicyclic amine or aromatic amine. The corrosion resistant coating further includes an adhesion promoter layer underlying the epoxy resin layer. The adhesion promoter layer contains phosphate of zinc, iron, manganese and tin. The adhesion promoter layer includes galvanic zinc and mechanical zinc, and compound chosen from functional silane, nano-scaled silane based primer, hydrolyzed silane, organosilane adhesion promoter, solvent/water based silane primer, and chlorinated polyolefin.