MV3012 Marine Corrosion and Prevention Syllabus:
MV3012 Marine Corrosion and Prevention Syllabus – Anna University Regulation 2021
COURSE OBJECTIVES:
To impart knowledge to the students on
• Sacrificial and Cathodic protection
• Hull plate preparation
• Modern paint types
• Corrosion in boiler
• Corrosion and its prevention
UNIT I INTRODUCTION
Cathodic Protection – Sacrificial anodes protection – Impressed current system protection – Bimetallic corrosion – Design faults causing corrosion – corrosion of metals in sea water, metallic corrosion.
UNIT II HULL PLATE PREPARATION
Plate preparation during building and repair periods -Atmospheric Corrosion Mill scale – flame cleaning – Acid Pickling – Blast cleaning – causes of paint failure – shipboard preparations for painting – power wire brushing – power discing – air hammer – high pressure water blasting – sand blasting shot blasting
UNIT III MODERN PAINT TYPES
Basic composition of paint Albyd – bitumen or pitch – chlorinated rubber – coaltar epoxy – Epoxy – oleoresinous – phenolic – polyurethane – primers – vinyl – self polrshing copolymers – shipboard paint systems – underwater AF paints – boot top anti corrosive paints – super structure paints.
UNIT IV CORROSION IN BOILER
Atoms & Ions, Ph value electrochemical corrosion, Direct chemical attack – Electro chemical attack – reason – remedial measures. Effect of salts & Grease in feed water. Effect of corrosion while boiler not in service – preservation to avoid corrosion.
CORROSION IN MARINE DIESEL ENGINES:Corrosive wear of cylinder liners – Reasons and remedies – corrosion of Main Engine Jacket cooling spaces – Reasons and remedies – corrosion in bearings.
UNIT V CORROSION AND ITS PREVENTION
Mechanism of corrosion – Chemical corrosion – Electro chemical corrosion – Anomic & cathodic protection – forms of metallic coatings – anodizing – phosphating.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
On completion of the course the students will be able to:
CO1: Identify the Causes of Hull corrosion
CO2: Apply correct Method of prevention during operation.
CO3: Select Anti-corrosive paints
CO4: Detect Corrosion in BOILERS and IC ENGINES
CO5: Design and develop mechanism of corrosion.
TEXT BOOKS:
1. Lavery, H.I.,”Shipboard operations” Institute of Marine Engineers Publication, 1990
2. Schweitzer, ‘Fundamentals of Corrosion”,1st Ed. Taylor & Francis, Indian Reprint 2012 (Yesdee Publishing Pvt. Ltd.)
3. M.E.P., “Corrosion for Marine & Offshore Engineers”, Marine Engineering Practice, Vol.02, Part 11, IMarEST, London
4. Francis Laurence LaQue , “ Marine corrosion: causes and prevention”, 1st Ed., Wiley, 1975
5. Claire Hellio, Diego M. Yebra, Pinturas Hempel S.A., “Advances in Marine Antifouling Coatings and Technologies”, Woodhead Publishing, 2009
REFERENCES
1. Pierre R. Roberge, “Corrosion Engineering Principles and Practice”, 1st Ed., McGraw Hill, 2008
2. Zaki Ahmad, “Principles of Corrosion Engineering and Corrosion Control”,1st Ed. Elsevier Ltd.,2006