Define an alloy. How is an alloy prepared ? List two advantages of
making alloys. Write the composition of stainless steel. Why is steel
preferred over iron ? List two reasons.
Р.
19
Answers
An alloy is a mixture of metals or a mixture of a metal and another element.
The majority of alloys are prepared by mixing metals in the molten state; then the mixture is poured into metal or sand moulds and allowed to solidify. Generally the major ingredient is melted first; then the others are added to it and should completely dissolve.
Two advantages of making alloy are-
Alloy s ste made more resistant to corrosion than pure metals.
The colour pure metal can be modified by alloying with other metals.
About <0,15% is the composition of stainless steel.
Because iron exposed to air starts rusting which if used for cooking can cause disease,while stainless steel is a alloy which do not rust and is safe for cooking.
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