材料腐蚀与防护(英语)
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Painting process
Plating process
Cathodic protection
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Cathodic protection system
Cathodic protection markers
PA R T F O U R
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4
Summary
Summary
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Ⅰ
Why we need to protect metallic materials?
Identification tags made from Monel
Coatings
Coatings provide a barrier of corrosion-resistant material between the damaging environment and the structural material.
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aim
Mechanism schemes
protect metallic materials better
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PART THREE
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Fra Baidu bibliotekProtection methods
Suitable materials
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Corrosion-resistant materials
Stainless steel Copper alloys Monel alloy ……
Ⅱ Why metallic materials can be corroded? Ⅲ What methods we can take to protect metallic materials?
Thank you for your attention！
PA R T T W O
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Mechanism
Mechanism
Definition : Corrosion is the gradual destruction of metallic materials by chemical or electrochemical reaction with their environment.
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steel bridge
coins bolts and nuts
Corrosion Damages
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• Direct/indirect economic loss (4.2% of GDP) • Impact on people’s daily life • Environmental pollution • Resources and energy waste
Metallic Materials Corrosion and Protection
01 | Background
Content
02 | Mechanism
03 | Protection methods
04 | Summary
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PA R T O N E
1
Background
Application of metal