3. Metals and Non-metals-Corrosion Science Class 10 In English-CBSE Notes
Explore science cbse notes for Class 10 Chapter 3. Metals and Non-metals Topic Corrosion in English medium for exams preparation.
3. Metals and Non-metals-Corrosion Science Class 10 In English-CBSE Notes
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All Topics Chapter 3. Metals and Non-metals
- 1. Introduction
- 2. Chemical Properties of Metals
- 3. Occurance of Metals
- 4. Corrosion
- 5. Important Questions Based on Chapter
Notes
3. Metals and Non-metals-Corrosion Science Class 10 In English-CBSE Notes
3. Metals and Non-metals
Corrosion
Corrosion:
When some metals articles come in the contact of oxygen or moistures, this reacts with oxygen or water vapour and forms metal oxides which get rusted, resulting in fatal surface loss of metals. This surface loss of metal is known as corrsion.
Prevention of Corrosion:
Corrosion can be prevented by
(i) By painting, Oiling and by greasing.
(ii) By Galvanisation, chrome plating or by anodising.
(iii) By making alloys.
Galvanisation: A method of protecting steel and iron from rusting by coating them with a thin layer of zinc. This process is known as Galvanisation.
Alloying: Pure metals are not used to make articles. So there are mixed some other substances to make them hard and strong and causing changing in metal's properties. This process is called alloying.
- Alloying is a very good method of improving the properties of a metal.
- An alloy is a homogeneous mixture of two or more metals, or a metal and a nonmetal.
- It is prepared by first melting the primary metal, and then, dissolving the other elements in it in definite proportions. It is then cooled to room temperature.
Some examples of alloys:
(I) Iron is the most widely used metal. But it is never used in its pure state. This is because pure iron is very soft and stretches easily when hot. But, if it is mixed with a small amount of carbon (about 0.05 %), it becomes hard and strong steel.
(ii) Iron is mixed with nickel and chromium to make stainless steel.
(iii) Pure gold is of 24 carat gold, which is very shoft. so there can not be made jewellery by it. It is alloyed with either silver or copper to make it hard. 22 parts of pure gold is alloyed with 2 parts of either copper or silver such a gold is called 22 carat of gold.
| Alloy | Mixture | Symbols |
| Brass (पीतल) | Copper + zinc | Cu + Zn |
| Bronze (कांसा) | Copper + tin | Cu + Sn |
| Solder (सोल्डर) | Lead + tin | Pb + Sn |
All Topics Chapter 3. Metals and Non-metals
3. Metals and Non-metals-Corrosion Science Class 10 In English-CBSE Notes
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CBSE Notes for Class 10 science Chapter 3. Metals and Non-metals – Corrosion
The CBSE Notes for Class 10 science Chapter 3. Metals and Non-metals – Corrosion are prepared to help students understand every concept in a simple, clear, and well-organized manner. These notes are based on the latest CBSE syllabus and are suitable for regular classroom learning, homework, revision, and examination preparation. Every topic is explained using easy language so that students can learn important concepts without difficulty and develop a strong academic foundation.
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Prepare Better with Chapter-wise CBSE Notes
Success in examinations depends on consistent practice and smart revision. These CBSE Notes for Class 10 science Chapter 3. Metals and Non-metals – Corrosion are designed to reduce study pressure by presenting important information in a concise and meaningful way. Students can use them throughout the academic session for daily learning as well as last-minute revision before examinations.
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3. Metals and Non-metals-Corrosion Science Class 10 In English-CBSE Notes Study Materials For Class 6 to 12
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