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Effect of seawater corrosion on medium Carbon steel 0.34%C and 0.36%C

  • Type:Project
  • Pages:52
  • Format:Microsoft Word
(Mechanical Engineering Project Topics & Materials)

This project covers a study of the effect of seawater corrosion on 0.34% and 0.36% carbon steel 

compositions.

Two (2) specimens (steel rods) of length 150mm (each) for both steel compositions were 

obtained. Out of each was gotten four (4) specimens of 10mm length, 10mm diameter and two 

(2) specimens of 50mm length, 10mm diameter. This yielded a total of twelve (12) samples. For 

each steel composition, one (1) specimen of 10mm length and one (1) specimen of 50mm length 

were heat treated. The heat treated specimen of 10mm length and one corresponding sample that 

was not heat treated for each steel composition were exposed to seawater for seawater corrosion 

process. The heat treated specimen of 50mm length and one corresponding sample that was not 

heat treated for each steel composition were used for the micrography section of the project.

The result showed that the corrosion rate of 0.34%C changed from 0.21633mmpy to 

0.15711mmpy on exposure to seawater. It also shows that the corrosion rate of 0.36%C changed 

from 0.17889mmpy to 0.00024519mmpy on exposure to the same seawater condition. The 

reason for these changes in values of corrosion rates while exposed to the same environment 

constitutes the core of this project.

TABLE OF CONTENT

-ABSTRACT    ---------------------------------------------------------------------------------------13 

 CHAPTER ONE  ---------------------------------------------------------------------------------------14

INTRODUCTION  ---------------------------------------------------------------------------------------14

1.1  Background  ---------------------------------------------------------------------------------------14

1.2  Statement of problem ------------------------------------------------------------------------------15

1.3  Aim of study  ---------------------------------------------------------------------------------------16

1.4  Objective of the study ------------------------------------------------------------------------------16

1.5  Scope of work ---------------------------------------------------------------------------------------16

CHAPTER TWO  ---------------------------------------------------------------------------------------17

LITERATURE REVIEW  ------------------------------------------------------------------------------17

2.1  Medium carbon steels ------------------------------------------------------------------------------17

2.2  Heat treatment ---------------------------------------------------------------------------------------17 

6  2.3  Types of heat treatment of steel  ------------------------------------------------------------20

2.3.1  Annealing  ---------------------------------------------------------------------------------------20

2.3.2  Normalising  ---------------------------------------------------------------------------------------20

2.3.3  Spheroidising  ---------------------------------------------------------------------------------------20

2.3.4  Case Hardening  ------------------------------------------------------------------------------21

2.3.5  Hardening  ---------------------------------------------------------------------------------------22

2.3.6  Tempering  ---------------------------------------------------------------------------------------22

2.4  Corrosion  ---------------------------------------------------------------------------------------23

2.4.1  The consequences of corrosion  ------------------------------------------------------------24

2.4.2  Chemistry of corrosion  ---------------------------------------------------------------------25

2.4.3  Types of corrosion  ------------------------------------------------------------------------------26

2.4.4  Measurement of corrosion  ---------------------------------------------------------------------27

CHAPTER THREE  ---------------------------------------------------------------------------------------30

MATERIALS AND METHODOLOGY  ------------------------------------------------------------30

3.1  Materials  ---------------------------------------------------------------------------------------30

3.2  Methodology  ---------------------------------------------------------------------------------------32

3.2.1  Cutting and unribbing ------------------------------------------------------------------------------32

3.2.2  Heat treatment   ------------------------------------------------------------------------------32

3.2.3  Exposure to sea water ------------------------------------------------------------------------------33

3.2.4  Microstructure ---------------------------------------------------------------------------------------33

CHAPTER FOUR  ---------------------------------------------------------------------------------------34

RESULTS AND DISCUSSION  ---------------------------------------------------------------------34

4.1  Results ------------------------------------------------------------------------------------------------34

4.2  Discussion  ---------------------------------------------------------------------------------------36

4.2.1  The effect of seawater corrosion on 0.34% medium carbon steel  ------------------------36 

7  4.2.2  The effect of seawater corrosion on 0.36% medium carbon steel  ------------------------36

4.2.3  The  effect  of  seawater  corrosion  on  0.34%  and  0.36%  medium  carbon  steel  (the comparison)  ------------------------------------------------------------------------------------------------36

CHAPTER FIVE  ---------------------------------------------------------------------------------------37

CONCLUSION AND RECOMMENDATION  ---------------------------------------------------37

5.1  Conclusion  ---------------------------------------------------------------------------------------37

5.2  Recommendation  ------------------------------------------------------------------------------37

REFERENCES  ---------------------------------------------------------------------------------------38

APPENDIX 1 ------------------------------------------------------------------------------------------------40

APPENDIX 2 ------------------------------------------------------------------------------------------------41

Effect of seawater corrosion on medium Carbon steel 0.34%C and 0.36%C

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Details

Type Project
Department Mechanical Engineering
Project ID MCE0157
Price ₦3,000 ($9)
No of Pages 52 Pages
Format Microsoft Word

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    Details

    Type Project
    Department Mechanical Engineering
    Project ID MCE0157
    Price ₦3,000 ($9)
    No of Pages 52 Pages
    Format Microsoft Word

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