Nobody downloaded yet

Ballast Tank Repair - Assignment Example

Comments (0) Cite this document
Abstract Preferred for its low cost, high mechanical strength, ease of availability and fabrication, constructional/structural carbon steel however gets corroded easily in seawater. Spontaneous oxidation of the metal at its interface with a hostile marine environment causes it to rapidly lose material and thereby its strength, which leads to structural failure, unless adequately protected…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER92.4% of users find it useful
Ballast Tank Repair
Read TextPreview

Extract of sample
"Ballast Tank Repair"

Download file to see previous pages Mild steel by nature offers poor resistance to corrosion because of its inherent heterogeneous impurities, which facilitate emergence of anodic and cathodic nodes on the surface of the steel. Oxygen and water react with these nodes vigorously causing the metal to lose its electrons to form metallic ions, represented by the anodic reaction: 4 Fe ? 4 Fe++ + 8 e? Iron Ferrous Electrons Atom Ion The above electrochemical corrosion process is feasible only if there is a suitable electron acceptor to combine with the electrons released by the iron atom. Seawater containing dissolved atmospheric oxygen readily serves this purpose. The oxygen is electrochemically reduced to hydroxyl ions in the following cathodic reaction: 2 O2 + 4 H2O + 8 e? ? 8 OH? Oxygen Water Electrons Hydroxyl Ions The heterogeneous character of steel allows for some of its sites to favour the anodic reaction and for others to the cathodic reaction. The ferrous ions and hydroxyl ions formed combine together to produce ferrous hydroxide: 4 Fe++ + 8 OH? ? 4Fe (OH) 2 Ferrous Hydroxide The ferrous hydroxide formed reacts with more oxygen to form hydrated ferric oxide, the familiar reddish brown rust – the telltale symptom of corrosion. ...
oxygen concentration, water temperature, pH and the presence of metals in the form of dissolved salts such as oxides, chlorides, carbonates, sulphates and sulphites in the mineral state of their stable oxidised condition. In view of the large amount of energy expended for the extraction of a metal by the reduction process, there is a sustained pressure on the metal to revert back to its stable low energy oxidised state in the given environmental conditions. The driving force for corrosion is the energy differential between the pure metal and its oxidised forms in the scenario of ever varying ambient conditions. Pitting Corrosion Penetrative localized attack resulting in formation of deep crevices causing thinning of the parent steel material and revealed by rust is characteristic of Pitting Corrosion. It takes place more often in submerged bottoms, inaccessible edges and corners, and at high temperature locations like in the hull of ships where diffusion is easy. The locations most susceptible to corrosion in water ballast tanks are: upper surface of face plate of bottom longitudinals, bottom girders and bottom transverses; upper surface of shell and bulkhead longitudinals; Cut edges of slots and lightening holes in horizontal girders; upper surface of horizontal stiffeners and brackets; deck longitudinals; upper part of deck transverses; and, upper part of longitudinal and transverse bulkheads. If left unattended, rust can grow at the rate of 0.22 mm/year, though the assessed average rate is 0.005 mm/year. ASTM D 610 Standard, supported by ISO 4628: 2003 Standard provides further insight into the mechanics and assessment of the degree of rusting. Corrosion Prevention The popular prevention techniques in modern use have been logically derived from the manifestations of ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Ballast Tank Repair Assignment Example | Topics and Well Written Essays - 1750 words”, n.d.)
Retrieved from
(Ballast Tank Repair Assignment Example | Topics and Well Written Essays - 1750 Words)
“Ballast Tank Repair Assignment Example | Topics and Well Written Essays - 1750 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
Twin Turbo Engine Repair
...(to increase the amount of charge) or sequential (to increase the pressure of charge) operation. Examples of cars using such engines are Toyota Supra and BMW N54 etc. The current paper addresses one of the major repair problems for a twin turbo engine. Overhauling a Turbocharger: Most of the turbocharger users prefer to replace the whole turbocharger assembly in case of a fault. This is because of the complexities that arise during the repair of the assembly. The most important challenge during a turbocharger repair arises due to the small size of the components. This makes the vital parts such as bearings, turbine and compressor blades, seals etc. inaccessible for the...
2 Pages(500 words)Research Paper
Allan's Repair Services
...of the profit do you intend to pay as dividends and how much do you intend to retain? As an investor, it is important to know if company intends to pay its profit as dividend or retain it for further expansion. If Jim wants a constant income from his investment, then he will want frequent dividend payments from Metcash group. 3) What contingency plan do you have to tackle the external challenges that you may face in future? Due to the deteriorating external environment, it is important to know any contingency plans a company may have if there is a global recession in the World. Q2: 1. Allen Repair Services Corrected Income Statement For the year ending 31st December 2010 (1) $ $ Repair Service Revenue (4...
9 Pages(2250 words)Essay
Black Studies- Think Tank
...Black Studies- Think Tank Think Tank provides a mechanism of addressing issues of misery and developments in any given society around the world. The entire human population comprises of different integrated societies pursuing some common goals. These societies direct their efforts towards accomplishing social, political or economic objectives. As it is known, social settings comprising of people with varied cultural backgrounds, race and ethnicity, are constantly struggling to secure the limited resources and space. In this context, members of one community sharing similar goals will organize themselves into structured systems meant to facilitate the realization of these objectives. Think...
4 Pages(1000 words)Term Paper
Tank Leak
...Tank Leak Dear Sir, This is to inform you that work at the site for your new building has been interrupted by the discovery of a leaking, underground oil tank of dimensions 3m x 3m x 3m deep and 1m below ground level. Contamination due to the leak has affected an area of approximately 10m x 10m. Please find below my perception of the implications of this leakage along with my recommendations for dealing with the situation. Since the tank is not in current use, the leakage and resultant soil contamination is not so much a functional problem as an environmental and structural one. The issues of soil contamination will need to be addressed and the abandoned tank removed...
2 Pages(500 words)Personal Statement
Concrete Repair, Rehabilitation
...INFLUENCE OF SURFACE ROUGHNESS, WETNESS & CURING CONDITIONS ON THE ADHESION BETWEEN CONCRETES A Dissertation Presented to the Faculty of the Department of Civil Engineering College of Engineering Write Your University In Partial Fulfilment Of the Requirements for the Degree Bachelor of Science in Civil Engineering Submitted By: Write Your Name Please ABSTRACT Numerous strengthening techniques for concrete structures require adding of new concrete to existing old concrete element (Santos, et al., 2006). Some common examples include concrete overlays at highway structures, repair of corrosion damaged concrete structures where the deteriorated concrete is replaced with new one. The bond formed between the old and...
4 Pages(1000 words)Essay
Tank History
...Impact of Tanks On Military Transformation Early Years The adverse fighting conditions during the First World War had infused a desire in the British Army strategists to develop a new war machine- one that could easily cross trenches, destroy barbed wire, and resist machine-gun fire- one that is self-propelled and indomitable. The prime inspiration was the Rolls Royce armored vehicle used by the Royal Naval Air Service in 1914, and soon Sir Winston Churchill entrusted the Landships Committee with the task of developing this revolutionary weapon.1 Under the guidance of Colonel Ernst Swinton, the first successful model was completed, and was tested by the British Army on September 6, 1915.2 The first ever tank taken to war... was a...
4 Pages(1000 words)Essay
Social Research & Think Tank
...In the world there are organization that surpasses the expectations of others by their outstanding social purpose and ability to provide real life solution to the marketplace. One of those companies is Think Tank. The Think Tank is an worldwide entity that is variable organization structures consisting of cells of corporation, institutes and organization s whose purpose is to perform research targeting subjects such as social, policy, economic structures, political game planning, technology, industrial optimization as well military consulting services. Many organizations cooperate in a network to accomplish the development of projects whose objectives fostering social research in order to improve the efficiency of a diverse range... of...
4 Pages(1000 words)Essay
Industrial Repair
...Industrial Repair Inc (IR) Industrial Repair Inc. (IR) is a successful company that has been running industrial machine repair business for the last 25 years. Although IR started its work in Hartford, its reputation for timely service helped the company to gain customers throughout the state of Connecticut. IR values its customers and usually sends a crew of two technicians to them as quickly as possible to fix problems. However, the industrial repair market has undergone tremendous changes for the past few years. Numerous competitors entered the market and customer retention has become the major issue for IR. The company management realizes that it is...
1 Pages(250 words)Case Study
Think tank
...Think Tanks in the USA Introduction A think tank is an organization that sponsors research on specific problems, encourages the discovery of solutions to those problems, and facilitates interaction among scientists and intellectuals in pursuit of these goals. A public policy think tank clearly emphasizes on government policies, typically for creating viable alternatives or for improving those policies (Arin 20). By their very nature, public policy think tanks are involved with the academic and scholarly world (Wiarda 49). In fact, the most important sources of political change are not politicians, political parties or financial contributions. Rather, they are ideas...
3 Pages(750 words)Assignment
Water storage tank control
... Abdulla Mahana Alkaabi number: 672898 5012 Assessment Water storage tank control assignment REPORT TEMPLATE Please fill in the required sections as per instructions. Don’t add anything outside the boxes as it will be ignored. Do not make the boxes bigger. Part 1 – Paste an image of the part of your Front Panel that simulates the tank hardware in the space below Part 2 – Paste an image of the part of your Block Diagram that simulates the tank hardware in this box Part 3 – Paste an image of the Control and Instrumentation part of your Front Panel in this box Part 4 – Paste an image of the Control and Instrumentation part of your Block Diagram in this box...
4 Pages(1000 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Assignment on topic Ballast Tank Repair for FREE!
logo footer
Contact us:
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us