Corrosion / संक्षारण
The source defines corrosion as oxidative deterioration of a metal surface due to environmental action and describes it as an electrochemical process.
Environment की action के कारण metal surface का oxidative deterioration Corrosion कहलाता है। Source इसे electrochemical process बताता है।
Rusting of Iron / लोहे पर जंग लगना
When iron is exposed to air, its surface turns reddish because of formation of hydrated ferric oxide, commonly called rust.
Iron को air में expose करने पर hydrated ferric oxide form होता है जिसे Rust कहा जाता है।
Corrosion of Silver / चांदी का संक्षारण
The source states that silver turns black due to formation of silver sulphide.
Silver surface Silver Sulphide के formation के कारण black हो जाती है।
Corrosion of Copper and Bronze / तांबा एवं कांसा
Copper or bronze surfaces turn green due to formation of basic copper carbonate according to the source.
Copper या Bronze surface Basic Copper Carbonate के formation के कारण green हो जाती है।
Factors Accelerating Rusting / जंग को तेज करने वाले कारक
The source states that rusting is accelerated by impurities, H+, electrolytes such as NaCl and gases such as CO₂, SO₂ and NO₂.
Prevention of Corrosion / संक्षारण की रोकथाम
- Electroplating / Electroplating
- Oiling / तेल लगाना
- Greasing / Greasing
- Painting / Painting
- Varnishing / Varnishing
- Galvanisation / Galvanisation
Galvanisation / गैल्वनाइजेशन
The source describes galvanisation as deposition of a zinc layer over iron articles.
Iron articles के ऊपर Zinc layer deposit करने की process को Galvanisation कहा जाता है।
Quick Revision / त्वरित पुनरावृत्ति
- Iron corrosion → Rusting
- Rust → Hydrated ferric oxide
- Silver blackening → Silver sulphide
- Copper green coating → Basic copper carbonate
- Galvanisation → Zinc coating over iron