Corrosion Protection of Beryllium

Coatings used on beryllium for corrosion resistance include anodic coatings, chromate, fluoride, and organic paints. Anodic coatings, similar to those used in anodizing aluminum alloys, have been found to increase corrosion resistance in aqueous solutions and for elevated atmospheric temperature environments. Chromate coatings provide protection during storage and handling periods and in marine type environments for moderate periods. Fluoride coatings are used in distilled water and saltwater environments. Organic paints are used to provide an electrical insulation layer. This limits galvanic attack and has been observed to provide long term storage protection when deposited on top of a passivation type coating. Plated coatings have also been used on beryllium, providing electrical contacts, improved wear resistance, and better polishing surfaces.