EL3006 Cathodic Protection and Electrophoretic Coatings Syllabus:
EL3006 Cathodic Protection and Electrophoretic Coatings Syllabus – Anna University Regulation 2021
OBJECTIVE:
• To familiarize the students with the basics of cathodic protection and electrophoretic coatings.
UNIT I BASICS OF CATHODIC PROTECTION
Basics of cathodic protection. Electrical basis of cathodic protection. Electrochemical theory of cathodic protection. Definition of cathodic protection using Evans diagram and Pourbiax diagram, derivation of protective potential for steel. Protective potentials for different methods.
UNIT II SACRIFICIAL ANODE SYSTEM & IMPRESSED CURRENT SYSTEM
Cathodic protection system, components of galvanic systems, galvanic anodes, fields of application and backfills for sacrificial anodes. Advantages and disadvantages of sacrificial anode system. Impressed current system, impressed current anodes, fields of application and backfills for impressed current anodes.
UNIT III DESIGNING OF CP SYSTEM
Design parameters in cathodic protection, soil resistivity measurement, pipe to soil potential data, pH determination, redox potential measurement, coating resistance, stray current measurement and cathodic protection interferences designing of sacrificial anode system – designing of impressed current system – designing of cathodic protection to ship hull
UNIT IV BASIC CONCEPTS OF ELECTRO PHORETIC COATINGS
Electrical Constitution of Aqueous Solutions, Dispersions and Suspensions of Paint BindersElectrokinetic Effects-Electrochemical Parameters of Colloid Particles- Electro-osmosis- Voltage and current Relations in Electro-painting-Throwing power & other factors in Electro-paintingPretreatment for Electro-painting-Synthetic resins used for Electro-painting.
UNIT V APPLIED ASPECTS OF ELECTRO PHORETIC COATINGS
Installations for Electro-painting- Paint bath stability, Control, & Replenishment-Testing of paint bath-Effluent treatment-Process involved in Electro-painting installations-Economics.
TOTAL: 45 PERIODS
OUTCOME:
• Understand the basics of cathodic protection
• Understand sacrificial anode system & impressed current system
• Understand designing of cp system electroplating of alloys and other plating methods
• Acquire knowledge on basic concepts of electrophoretic coatings
• Apply aspects of electrophoretic coatings .
TEXT BOOKS:
1. Zaki Ahmad, “Principles of Corrosion Engineering and Corrosion Control”, Butterworth – Heinemann, London, 2006.
2. Willibald Machu, ”Hand book of Electro Painting Technology” Electrochemical Publications Limited, 1978.
REFERENCE:
1. Peabody A.N and Blanchetti R.L. , “Control of Pipeline Corrosion”, NACE Int., Texas, 2001.