PROTECTION OF STEEL FROM CORROSION

Kojenerasyon Nedir?

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1. INTRODUCTION

2. PROTECTION OF STEEL FROM CORROSION

2.1 Metallic Coatings

2.1.1 Electroplating

2.1.2 Electroless Plating

2.1.3 Thermal Spray Coatings

2.1.4 Solder Sealing

2.1.5 Hot–Dip Coating

2.1.6 Immersion Coatings

2.1.7 Vapor – Deposited Coatings

2.1.8 Mechanical Plating

2.2 Conversion Coatings

2.2.1. Phosphate Coatings

2.2.2 Chromate Coatings

2.2.3 Anodic Coatings

3. GALVANIZING PROCESS

3.1 History of Galvanizing Process

3.2 Iron and Steel for Galvanizing Process

3.3 What is Galvanizing Process

3.3.1 Surface Preparation

3.3.1.1 Cleaning

3.3.1.2 Acid Pickling

3.3.1.3 Fluxing

3.3.2. Galvanizing

3.3.3 Inspection

4 . HOT – DIP GALVANIZING PROCESS

4.1 Effect of Hot Galvanizing on Material Properties

4.2 High Temperature Hot-Dip Galvanizing

5. ELECTROGALVANIZING PROCESS

5.1 Bath Types of Electrogalvanizing

5.1.1 Acid Zinc Baths

5.1.1.1 Preparation of Acid Zinc Baths

5.1.1.2 Operation and Control of Acid Zinc Baths

5.1.1.3 Characteristics of Acid Zinc Baths

5.1.1.4 Operating Parameters of Acid Zinc Baths

5.1.2. Zinc Cyanide Baths

5.1.2.1. Preparation of Zinc Cyanide Baths

5.1.2.2 Operation and Control of Zinc Cyanide Baths

5.1.2.3 Function of Components in Zinc Cyanide Baths

5.1.2.4 Operating Parameters of Zinc Cyanide Baths

5.2 Electrogalvanizing Equipments

5.3 Operation of Electrogalvanizing Process

5.4 Properties of Electrogalvanized Coatings

5.5 Benefits of Electrogalvanizing

5.6 Testing of Electrogalvanizing

5.6.1 Thickness Tests

5.6.2 Corrosion Tests

5.6.3 Inspection

5.7 Certain Advantages of Electrogalvanizing over Hot-Dip Galvanizing

6. PERFORMANCE OF GALVANIZED COATING

6.1 Factors Affecting Galvanizing Quality and Service

6.2 Service Life of Galvanized Coating

6.3 Corrosion Performance of Galvanized Coating in Atmospheric Environment

6.3.1 Industrial & Urban Environments

6.3.2 Rural and Suburban Environments

6.3.3 Marine Environment

7. THE ECONOMICS OF STEEL PROTECTION

7.1 Initial Cost of Coating

7.2 Coating Life to First Maintenance

7.3 Cost of Maintenance

7.4 Hidden Costs

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