Definitions for "Phosphorous"
An essential chemical food element. Increased phosphorous levels caused by fertilisers and detergents washing into lakes and rivers can result in algae growth, killing fish and water plants.
an inorganic nutrient essential for plant growth and reproduction; excess can cause eutrophication; problems are usually associated with farmland runoff, sewage, and detergents.
A chemical element present in rocks, soils, plants and animals. It is essential for growth and is present in many fertilisers, but through run-off it may contribute to the formation of algal blooms in waterways.
Of or pertaining to phosphorus; resembling or containing phosphorus; specifically, designating those compounds in which phosphorus has a lower valence as contrasted with phosphoric compounds; as, phosphorous acid, H3PO3.
containing or characteristic of phosphorus; "phosphoric acid"
of, relating to, or containing phosphorus, especially with valence 3 or a valence lower than that of a comparable phosphoric compound
Its presence in steel is nominally limited to below 0.05% because of its embrittling effect. It is a powerful solid solution hardening agent. It is important to be aware phosphorous, especially in combination with silicon, can influence the control of post-galvanising. It is used as a deliberate alloy addition ( typically 0.07%)in low carbon free-cutting steel.
Phosphorous is generally restricted to below 0.04 weight percent to minimize its detrimental effect on ductility and toughness. Certain steels may contain higher levels to enhance machinability, strength and/or atmospheric corrosion resistance.