Corrosion Science And Engineering I

At the end of this course, students should be able to: 1. distinguish between wet and dry corrosion; 2. identify causes of corrosion failure in structural materials; 3. develop expertise to predict and prevent corrosion; and 4. show skills to develop inhibitors for corrosion prevention; 5. develop skills for corrosion monitoring and inspection of engineering infra structures; 6. understand the importance of adequate pretreatment of surfaces prior to applying coatings to prevent corrosion; and 7. know how to select appropriate corrosion control techniques for the protection of structures.

Review of electrochemistry: Electrochemical basis of corrosion; electrode potentials, etc. Basic principles of corrosion: definition; classification; mechanisms and factors affecting corrosion, types of corrosion, de-alloying (dezincification). Hydrogen damage, corrosion fatigue etc. Concept of polarization (over potentials): activation, concentration (transport); and resistance polarisation. Passivity/Passivation and Potential-pH (Pourbaix) diagram. High temperature oxidation (mechanism of oxidation, oxidation laws and Pilling-Bedworth ratio). Case studies: corrosion of steel in the atmospheres, waters, and some chemicals, rebar corrosion, microbial corrosion, corrosion in oil and gas environment e.g., sweet and sour corrosion and corrosion of metals and alloys in high temperature gases and salts. Pre-requisite: MAE 302. 500 Level