The alloy Ferrochrome contains two elements: Iron (Fe) and Chromium (Cr). Ferrochrome usually contains between 50-70% Chromium. It has the chemical formula of FeCr.

1:1

Bronze (Copper + Tin), Steel (Iron + Carbon), Brass (Copper + Zinc), Sodium Amalgam (Mercury + Sodium), Ferrochrome (Iron, Chromium)

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ferrochrome lignosulfonate,chrome lignosulfonate, chrome free lignosulfonate and iron lignosulfonate, potassium lignosulfonate could be used as drilling mud thinners in oilfield.

Chromium reacts with oxygen from the atmosphere to form the oxide Cr2O3, which is a type of metal oxide that is non-destructive as opposed to iron oxide. This property is used to protect steel when chromium is added to the molten metal to form an alloy with up to 30% chromium and is commonly known as "Stainless Steel". The Chromium oxide protects the metal from further oxidizing. Chromium will react with a number of other elements if the conditions are suitable. The most common is forming a carbide by reacting with carbon during the smelting process of Ferrochrome. This is typically and unwanted reaction in the process.