a compound in which chromium has a valence of 6. Chromate may be added to drilling fluids either directly or as a constituent of chrome lignites or chrome lignosulfonates. In certain areas, chromate is widely used as a corrosion inhibitor, often in conjunction with lime.
A salt of chromic acid. ... Sodium chromate Cr 51, anionic hexavalent radioactive chromium in the form of sodium chromate (Na251CrO4) with a half-life of 27.8 days; used for the determination of circulating red cell volume and red cell survival time. ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973