Corrosion
Corrosion
Corrosion:
When a piece of iron is left in open for sometime, it acquires a film of brownish substance which is called rust. This process of change of iron to rust is called rusting of iron. Rust is different from iron. This rust is iron oxide. The chemical equation of rusting of iron can be represented as :
Prevention of Rusting:
(i) Galvanisation: It is considered as the best method to prevent rusting. It is the process of deposition of a thin layer of zinc on iron surface. It is done to prevent rusting of iron. Rusting can also be prevented by deposition of thin layer of chromium on iron articles. We use galvanised Iron (G.I) pipes to carry water in taps. It is estimated that about 15% of the total world production of iron is destroyed due to rusting.
(ii) Application of coat of paint or grease on the surface of iron also help in prevention of rusting.
Corrosion of which of the following metals is most serious problem? | |||
| Right Option : C | |||
| View Explanation | |||
For protection of Iron pipes from corrosion they are coated with _________________ | |||
| Right Option : D | |||
| View Explanation | |||
Match the items of Column I with the items of Column II and choose the correct answer using the codes given below.
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| Right Option : C | |||||||||||||
| View Explanation | |||||||||||||
Students / Parents Reviews [20]
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
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Om Umang
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Eshan Arora
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Aman Kumar Shrivastava
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Yatharthi Sharma
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
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Archit Segal
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Manya
8thWhen I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
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Barkha Arora
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Yogansh Nyasi
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Barkha Arora
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Aman Kumar Shrivastava
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Shivam Rana
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Prisha Gupta
8thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
