Corrosion Of Metals
Bayani Gaba-gaba
Every year, vast sums are spent replacing iron and steel that has crumbled into orange-brown rust. Rusting is a slow chemical attack that needs just two things from the environment, and once you know what they are, you know how to stop it. Protecting metal from corrosion is one of the most practical applications of chemistry.
In this lesson you will learn the conditions needed for iron to rust, the barrier methods that keep it dry and airtight, and the clever use of a more reactive metal in galvanising and sacrificial protection. You will explain sacrificial protection in terms of the reactivity series and the loss of electrons.
Manufura
- State the conditions required for the rusting of iron and steel to form hydrated iron(III) oxide.
- State some common barrier methods, including painting, greasing and coating with plastic.
- Describe how barrier methods prevent rusting by excluding oxygen or water.
- [Supplement] Describe the use of zinc in galvanising as an example of a barrier method and sacrificial protection.
- [Supplement] Explain sacrificial protection in terms of the reactivity series and in terms of electron loss.
Takardar Darasi
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Nazarin Darasi
Barka da kammala darasi akan Corrosion Of Metals. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which two substances are needed for iron to rust? A. oxygen and carbon dioxide B. water and oxygen C. water and nitrogen D. salt and oxygen only Answer: B
- Rust is mainly: A. iron(II) oxide B. hydrated iron(III) oxide C. iron carbonate D. iron sulfide Answer: B
- Which is a barrier method of rust prevention? A. galvanising B. sacrificial protection C. painting D. attaching magnesium blocks Answer: C
- In sacrificial protection of iron, the metal used must be: A. less reactive than iron B. more reactive than iron C. a non-metal D. the same as iron Answer: B
- Galvanising protects steel by: A. only acting as a barrier B. only sacrificial protection C. acting as a barrier and by sacrificial protection D. making the steel more reactive Answer: C
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Corrosion Of Metals? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
