Chromate:

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.

Terms Related to Chromate

• Sodium chromate

  See chromate, caustic soda.

• Chrome lignite

  Mined lignite, usually leonardite, to which chromate has been added or has reacted. The lignite can also be causticized with either sodium or potassium hydroxide.

• Sodium bichromate

  Also called sodium dichromate. See chromate.

• Indicator

  1.a dial gauge used on the rig to measure the hookload. 2. Substances in acid-base that, in solution, change color or become colorless as the ...

• Calcium hydroxide

  The active ingredient of slaked (hydrated) lime, and the main constituent in cement (when wet). Referred to as "lime" in field terminology.

• Red-lime mud

  A water-base clay mud containing caustic soda and tannates to which lime has been added. Also called red mud.

• Potassium

  One of the alkali metal elements with a valence of 1 and an atomic weight of about 39. Potassium compounds, most commonly potassium hydroxide (koh), ...