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15.7 Preventing rust

memorize.ai (lvl 286)

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13 cards

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Section 1

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Plastic coating

Front

1 / 13

Rust

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Last updated

6 years ago

Date created

Mar 1, 2020

Cards (13)

Section 1

(13 cards)

Plastic coating

Front

Used for garden furniture and wire netting of fence.

Back

Corrosion

Front

The deterioration of a metal due to a chemical reaction in the environment.

Back

What speeds up rusting?

Front

Presence of electrolytes such as salt.

Back

Methods that prevent rusting

Front

Paint, plastic coating, metal plating, greasing and oiling.

Back

Rusting

Front

Corrosion of iron and steel due to water and oxygen.

Back

How does zinc protect iron?

Front

When its surface is scratched, some sort of electrochemical cell is set up in presence of moisture.

Back

What does 4Fe (s) + 3O2 (g) + 2H2O (l) give you?

Front

2Fe2O3 . H2O (s)

Back

Paint

Front

Used for bridges and cars.

Back

Galvanising

Front

The protection of iron or steel by coating it with a layer of zinc.

Back

Sacrificial protection

Front

Using a more reactive metal to protect a less reactive metal from corrosion.

Back

Oxidation of zinc

Front

Produces zinc ions and electrons.

Back

Electrons from zinc

Front

Flow from zinc to iron and keeps iron in reduced state.

Back

Metal plating

Front

Coating with another metal. Chromium plating for bathroom taps, tin plating for steel food cans, zinc coating for iron roofing.

Back