SlideShare a Scribd company logo

Rusting of iron expt and prevention

•Download as PPT, PDF•
•
K
Karnataka OER

The document describes an experiment to determine the conditions required for iron rusting. Tubes containing iron samples were exposed to different combinations of air, water, and salt. Results showed rust only formed when samples had both air and water, and salt made rusting worse. Common ways to prevent rusting include coating metals with oil, paint, zinc, or alloys, electroplating with other metals, using sacrificial protection, or coating with plastic.

1 of 6
Downloaded 56 times
Rusti
water boiled water layer of oil A B C D E zinc foil water F salt water Rusting of Iron anhydrous calcium chloride
Results (after one week) Tube Conditions Observation A normal air B air but no water C water and dissolved air D water but no air E water, air and salt F water air, and a more reactive metal  
Results (after one week) Tube Conditions Observation A normal air B air but no water C water and dissolved air D water but no air E water, air and salt F water air, and a more reactive metal   some rust no rust rusty no rust very rusty no rust
Conclusion For rusting to happen, both _____ and ______ must be present. ______ can make rusting worse.   Ways of preventing rust  Method Example •        Coat with oil or grease Bicycle chain •        Coat with layers of paint Car body •        Galvanize with zinc Nail •        Alloy with other metals Stainless steel cutlery •        Electroplate with another metal Jewellery •        Use sacrificial protection  Ship’s hull air water Salt •        Coat with plastic Mesh fence
Conclusion For rusting to happen, both _____ and ______ must be present. ______ can make rusting worse.   Ways of preventing rust  Method Example •        Coat with oil or grease Bicycle chain •        Coat with layers of paint Car body •        Galvanize with zinc Nail •        Alloy with other metals Stainless steel cutlery •        Electroplate with another metal Jewellery •        Use sacrificial protection  Ship’s hull air water Salt •        Coat with plastic Mesh fence

More Related Content

Rusting of iron expt and prevention

  • 2. water boiled water layer of oil A B C D E zinc foil water F salt water Rusting of Iron anhydrous calcium chloride
  • 3. Results (after one week) Tube Conditions Observation A normal air B air but no water C water and dissolved air D water but no air E water, air and salt F water air, and a more reactive metal  
  • 4. Results (after one week) Tube Conditions Observation A normal air B air but no water C water and dissolved air D water but no air E water, air and salt F water air, and a more reactive metal   some rust no rust rusty no rust very rusty no rust
  • 5. Conclusion For rusting to happen, both _____ and ______ must be present. ______ can make rusting worse.   Ways of preventing rust  Method Example •        Coat with oil or grease Bicycle chain •        Coat with layers of paint Car body •        Galvanize with zinc Nail •        Alloy with other metals Stainless steel cutlery •        Electroplate with another metal Jewellery •        Use sacrificial protection  Ship’s hull air water Salt •        Coat with plastic Mesh fence
  • 6. Conclusion For rusting to happen, both _____ and ______ must be present. ______ can make rusting worse.   Ways of preventing rust  Method Example •        Coat with oil or grease Bicycle chain •        Coat with layers of paint Car body •        Galvanize with zinc Nail •        Alloy with other metals Stainless steel cutlery •        Electroplate with another metal Jewellery •        Use sacrificial protection  Ship’s hull air water Salt •        Coat with plastic Mesh fence