CORROSION PROTECTION METHOD
TABLE OF CONTENTS
TITLE PAGE – – – – – – – – i
CERTIFICATIONS – – – – – – – ii
DEDICATIONS – – – – – – – – iii
ACKNOWLEDGEMENTS – – – – – – iv
TABLE OF CONTENTS – – – – – – v-vii
CHAPTER ONE
1.0 NTRODUCTIONS – – – – – – 1-2
CHAPTER TWO
2.0 TYPES OF CORROSION – – – – – 3
2.1 Galvanic corrosion – – – – – – 3-4
2.2 Pitting corrosion – – – – – – – 4-5
2.3 Crevice corrosion – – – – – – 5
2.4 High-temperature corrosion – – – – – 5-6
2.5 Corrosion in non metals – – – – – 7
2.6 Corrosions of polymers – – – – – – 7-8
2.7 Corrosion of glass – – – – – – 8-9
CHAPTER THREE
3.0 CLASSIFICATION AND METHODS OF CORROSION PROTECTIONS – — 10
3.1 Classifications of corrosion protection methods – – 10
3.1.1 Active corrosion protection – – – – – 10
3.1.2 Passive corrosion protection – – – – – 10-11
3.1.3 Permanent protection – – – – – – 11
3.1.4 Temporary protections – – – – – – 11-12
3.2 Methods of corrosion protections – – – – 12
3.2.1 Coatings – – – – – – – – 12
3.2.2 Painting – – – – – – – – 13
3.2.3 Plantings – – – – – – – – 13-14
3.2.4 Corrosions inhibitor – – – – – – 14
3.2.5 Liquid phase inhibitors – – – – – – 14
3.2.6 Volatile corrosion inhibitors – – – – – 15
3.2.7 Impressed current cathodic protection – – – 15
CHAPTER FOUR
4.0 SUMMARY AND CONCLUSION
4.1 Summary – – – – – – – – 16
4.2 Conclusion – – – – – – – – 17
References
CHAPTER ONE
INTRODUCTIONS
Corrosions is deterioration of metal because of reaction with surroundings. Generally corrosions is the effect of low water pH. H+ ion reacts with electrons at cathode. The factors like pH, oxygen contents, chemicals makeup of water, dissimilar metals, temperature, velocity and pressure in pipeline are important in corrosion of pipeline systems. Coating galvanizing, linning, electroplating, anodizing are few common methods for corrosion preventions, new economical and effective methods are being explored by various investigators. Corrosion affect the economy of the chemical research because of the growing need to implement effective and economical corrosion presentation methods.
In practice corrosion can never be stop but can be hindered to a reasonable level. Over the years, reductions in the rate of metal corrosion have been achieved through a number of ways, it involves controlling the pH or ion concentration of the solution or controlling the metal solution interface. This is achieved through the addition of small amount of chemical called inhibitors, that either form a barrier like layer on the metal surface or stimulate film formation and by so doing retard or slow down the rate of metal dissolution according to khaled, (2006). Acid solutions are widely used in industry some important fields of application include acid pickling of iron and steel, chemical cleaning and processing, are production and oil well acidification, acids such as HCl and H2SO4 are generally in the treatment of steel and ferrous alloys. Because of the general aggression of acid solution inhibitors are commonly used to reduce the corrosive attack on metallic materials.
