Corrosion resistant coatings

摘要

A coating composition comprising an effective corrosion-inhibiting amount of a praseodymium oxide, a neutral to slightly acidic generating extender or an acidic generating extender, or combinations thereof is provided at least one of which includes a metal cation selected from the group consisting of calcium, strontium, and barium. In one embodiment, the corrosion-inhibiting components are combined with other components such as extenders, amino acids and amino acid derivatives, gelatin and gelatin derivatives, organic-based exchange resins, and combinations thereof, to enhance the corrosion resistance of the resultant coating film. The coating compositions have good adhesion to substrates such as metals, including aluminium and aluminium alloys.