A look into the inhibition mechanisms of mixtures containing RE trivalent ions and organic compounds

摘要

The combination of different materials in the same structure or equipment is common in modern engineering. With it comes the risk of galvanic action between those materials. A recent example is the combination of light alloys and carbon fiber reinforced plastics (CFRP) in new cars and aircrafts. The galvanic coupling of the conductive composites with the metal parts is still not well characterized and the prospect of galvanic corrosion is one of the main concerns of the transport companies. Another galvanic coupling of prime technological importance is that between zinc and iron as in galvanized steel. Often the corrosion of the zinc layer can be decreased, extending the service life and still keeping the protective galvanic action, when the ferrous substrate becomes exposed.