In the new millennium there will be demands for fluoropolymer and flourochemical processes to provide higher throughput and higher purity products. Meanwhile materials of construction for anhydrous hydrogen fluoride (AHF) and hydrofluoric acid (HF) will be pushed to higher temperatures, pressures and exposed to new and higher concentration impurities. This is a review of corrosion data and degradation information for metal alloys and nonmetals exposed to environments of AHF and HF with other acids, and impurities.