well stainless stell (iron,nickel chromium) doesnt corrode (like iron) ......thus it is used to make utensils
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Stainless steel is a metal alloy, made up of steel mixed with elements such as chromium, nickel, molybdenum, silicon, aluminum, carbon, etc. It is universally preferred for making kitchen utensils, because it does not affect the flavor of food and is easy to clean. Minimal maintenance and possible total recycling of stainless steel utensils also contribute to their popularity. It is called stainless as it is highly resistant to stains, i.e., rusting.
Chemical Properties
Pure iron (Fe), mixed with carbon to produce 'steel', is the main element of stainless steel. Chromium is added to steel to make it resistant to rust. Pure iron is prone to rusting, which is due to its reaction with oxygen in the presence of water (moisture), whereas iron's reaction with oxygen is corrosive and eats away at the iron, chromium reacts with oxygen in such a way that only the outer surfaces become oxidized and further oxidation is prevented. Chromium forms a passive layer of chromium oxide, which prevents mechanical and chemical damage, over steel. The other minor constituents of steel are nickel, nitrogen, molybdenum and aluminum. Small contents of nickel increase the corrosion resistance further, and protect it from rough usage and harsh environmental conditions. Pitting or scarring is avoided by adding molybdenum to steel.
Chemical properties and structure of stainless steel are improved using other alloys. Titanium, vanadium and copper are the alloys which make it more suitable for specific uses, and are used only when the buyer demands the specialized type of steel.
Chemical Properties
Pure iron (Fe), mixed with carbon to produce 'steel', is the main element of stainless steel. Chromium is added to steel to make it resistant to rust. Pure iron is prone to rusting, which is due to its reaction with oxygen in the presence of water (moisture), whereas iron's reaction with oxygen is corrosive and eats away at the iron, chromium reacts with oxygen in such a way that only the outer surfaces become oxidized and further oxidation is prevented. Chromium forms a passive layer of chromium oxide, which prevents mechanical and chemical damage, over steel. The other minor constituents of steel are nickel, nitrogen, molybdenum and aluminum. Small contents of nickel increase the corrosion resistance further, and protect it from rough usage and harsh environmental conditions. Pitting or scarring is avoided by adding molybdenum to steel.
Chemical properties and structure of stainless steel are improved using other alloys. Titanium, vanadium and copper are the alloys which make it more suitable for specific uses, and are used only when the buyer demands the specialized type of steel.
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Stainless steel is preferred for making kitchen utensils because it does not affect the flavor of food and is easy to clean.Stainless steel is a metal alloy, made up of steel mixed with elements such as chromium,nickel,carbon. Iron mixed with carbon to produce steel is the main component of stainless steel.
Chromium is added to make it resistant to rust. So it does not rust when utensil is washed off.
Chromium is added to make it resistant to rust. So it does not rust when utensil is washed off.
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