What types of materials and/or coatings would provide platforms and component systems to withstand corrosive environments (eg marine, icing, sandstorms, high temps, etc.)?

Can materials be coated or processed in such a way as to improve their properties (eg aluminum-like properties from coatings to reduce cost of using aluminum)?

What types of new materials or manufacturing processes will be useful to new aerospace platforms (eg new alloys or superalloys, hybrid materials, etc.)?