1. Lesson 11 Corrosion and Its Prevention
每一张的背景相同，但内容不同。比如说每一课的第一页----标题页必须插入一幅与标题内容相关的图片，图片大小如上。

2. Contents What is corrosion? The causes for the corrosion.
The anti-corrosion measures.
此页为目录页，把课文的主要内容概括一下。

3. Lead-in
What happened to the ship in the picture?

4. What are the three main causes which cause corrosion to happen to ships?
1. Oxidizing.
2. Electrochemical reaction.
3. Cracking.

6. The three anti-corrosion measures mentioned in the text:
1. The provision of an adequate protective coating.
2. Cathodic protection.
3. Good design and arrangement of structural members.

7. The principal areas requiring different forms of treatment:
1. Underwater plating.
2. Boot topping region.
3. The topsides.
4. The superstructure.
5. The weather decks.

8. Cathodic protection
1. The working mechanism of the cathodic protection onboard ships.
2. Two means of cathodic protection.
---- The sacrificial anode type.
----- The impressed current system.

10. Language knowledge Under- Undercoat Underfloor Undergraduate
Anti-
Anti-corrosive
Anti-lock
Anti-hero
Anti-social
Anti-freeze
Anti-body
Under-
Undercoat
Underfloor
Undergraduate
Underpants
undergrowth
从此页开始为单词学习部分，可根据情况对课文的单词进行扩充并辅以图片。

11. Assignment Memorize the language points . Extended readings
What are the characteristics of the paint used on boot topping region?
What is the working mechanism of the cathodic protection onboard ships?