Introduction to Corrosion

• Engineering
• Further Education (Key Stage 5)

Introduction to Corrosion

By Kyle Smith

What do you know about 'Corrosion'?

In your own words, define 'Corrosion'.

Corrosion: Definition

'Corrosion  - is the physicochemical interaction between a metal and its environment, which results in changes in the metal’s properties and which may lead to significant functional impairment of the metal, the environment, or the technical system of which they form a part ( ISO 8044:2010).

At the end of the lesson you will be quizzed on this definition, 

The ISO Standard for: Corrosion of metals and alloys — Vocabulary

This document can be found athttp://extension://efaidnbmnnnibpcajpcglclefindmkaj/https://cdn.standards.iteh.ai/samples/71134/642505f174ad4feeb2eef113b494d4e4/ISO-8044-2020.pdf

Corrosion: The Facts

• 4% of UK GNP (Circa £30bn)
• Corrosion is a factor within all industries, and left unchecked corrosion has catastrophic effects on infrastructure and transport.
• Throughout the centuries, we can observe actions taken against corrosion. For example, we know that the Romans covered copper utensils with a thin layer of tin to prevent corrosion.

01:27

Why is 'Rusting' known as a REDOX reaction?

01:51

What are the 3 key parts to the corrosion system?

03:36

What is a problem with having 'Iron' components in a given structure?

Group Task: The Brief

Based on the previous slides your group needs to:

• Nominate a group leader.
• Sketch out the corrosion system/cell.
• Label 3 of the key elements of the system.
• Group leader to take photo of completed work.
• Submit photo to slide

Let the task begin...

Group 1 Submit your sketches

Evaluate group 1 sketch/diagram

Group 2 Submit your sketches

Evaluate group 2 sketch/diagram

Corrosion accounts for what percentage of GNP?

1. 4%
2. 5%
3. 8%
4. 10%

Select the three parts of the corrosion cell

1. Electrolyte Water
2. Oxygen
3. Steel
4. Metal

What is the most significant thing you learned in this session?”

What remains unclear or confusing from today?

How do you feel about the topic of corrosion after todays lesson?

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