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CBSE Notes for Class 10 Science chapter 3. Metals and Non-metals: Corrosion | Prevention | alloys, quick revision notes for Class 10 Science chapter 3. Metals and Non-metals Corrosion | Prevention | alloys, Chapter-wise CBSE Revision Notes, CBSE Notes PDF Free Download, CBSE One Liner Notes Class 10, Half Yearly Revision Notes, CBSE Revision Notes Class 10 Science
Get CBSE Notes for Class 10 Science Chapter 3. Metals and Non-metals: Corrosion | Prevention | alloys prepared by experts as per the latest NCERT syllabus and CBSE exam pattern. These concise and easy-to-understand notes cover important definitions, formulas, diagrams, and key concepts from the chapter to help students in quick revision and effective exam preparation. Whether you are studying for school tests, board exams, or competitive exams, these notes provide a reliable study resource. Designed in simple language with point-wise explanations, they save time and enhance learning efficiency. Download free PDF notes, explore solved examples, and strengthen your understanding of [Topic Name] for scoring high marks. Perfect for Class 10 students who want clear, structured, and exam-oriented notes for CBSE Science.
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.
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 |
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