Hitesh cathodic protection
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This document is a chapter-by-chapter summary of a document on cathodic protection of pipelines. It discusses the principles of corrosion, forms of corrosion including uniform, galvanic, crevice, pitting and stress corrosion cracking. It explains the mechanisms and prevention methods for different forms of corrosion. The document is intended to provide an overview of corrosion and cathodic protection for pipelines.
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![[object Object],[object Object],[object Object],[object Object],Suez Canal University Faculty of Petroleum & Mining Engineering Metallurgy & Materials Engineering Dept. Supervised by Prof . Dr. Mohamed abd El Fattah El Zeky See the details @ www.metallurgy.eg.vg](https://image.slidesharecdn.com/hiteshcathodicprotection-110122021412-phpapp01/85/Hitesh-cathodic-protection-1-320.jpg)
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1. Corrosion is the primary means by which metals deteriorate when exposed to various environments like water, acids, bases, salts, oils, gases, and other chemicals. Understanding metallurgical factors that influence corrosion, like chemical composition, material structure, alloying elements, and heat treatment, is important for controlling corrosion in industries like petroleum and chemicals.
2. Key metallurgical factors that affect corrosion include the chemical composition, material structure, grain boundaries, alloying elements, mechanical properties, heat treatment, surface coating, welding, and manufacturing conditions of metals and alloys.
3. Common forms of corrosion include general corrosion, localized corrosion, intergranular corrosion, stress corrosion cracking, and corrosion
Chapter two new
The document discusses various types of damages that affect equipment, including corrosion, wear and tear, and fatigue. It classifies damages as either technical-economic processes related to equipment obsolescence or technical processes related to changes in the equipment's state. Within technical processes, damages can have either sudden or continuous behavior over time. Common damages are then discussed in more detail, including the causes, mechanisms, and ways to minimize corrosion and wear.
APPLICATION OF WASTE NATURAL MATERIAL FOR CORROSION INHIBITION OF LOW CARBON ...
This document summarizes research on using waste natural materials as corrosion inhibitors for low carbon steel in NaCl solutions. Specifically, it investigates the inhibitory effects of onion peel extracts in 1.5M NaCl solution. Testing methods like weight loss measurements, polarization techniques and SEM imaging were used to analyze the protective film formed by onion peel compounds adsorbed on the steel surface. Results found the aqueous onion peel extract inhibited over 90% of corrosion. The researchers concluded onion peel is a promising green corrosion inhibitor for low carbon steel in NaCl environments. Future work could study individual bioactive compounds in onion peel and developing coating layers from extract-treated surfaces.
Water chemistry and corrosion
Water Chemistry: Hardness of water, EDTA Method, Ion Exchange Method, Reverse Osmosis, Chlorination.
Corrosion: Definition, Cause and Effects, Types of corrosion, Oxidation corrosion, Electrochemical Corrosion, Factors influencing corrosion, Waterline corrosion, Pitting corrosion, Cathodic protection, Galvanizing
Corrosion Control By Deposition Of Ca Co3
Corrosion is the process of metals returning to their natural state through a series of electrochemical reactions when in contact with water. It occurs due to the large difference in reduction potentials between oxygen and most metals. Common types of corrosion include uniform corrosion and galvanic corrosion. Corrosion can be prevented through methods like galvanizing, alloying, corrosion inhibitors, and cathodic protection. The proposed project aims to alter water parameters to deposit a CaCO3 barrier on metal surfaces to prevent corrosion without adding foreign elements or altering metal properties.
Corrosion.pdf
There are several types of corrosion described in the document. Sweet corrosion involves reaction with carbon dioxide and fatty acids while sour corrosion involves hydrogen sulfide. Other types include oxygen corrosion, electrochemical corrosion, uniform attack, pitting corrosion, crevice corrosion, galvanic corrosion, and erosion corrosion. Corrosion can also be classified based on the mechanism as chemical, electrochemical, or localized attacks like intergranular corrosion or stress corrosion cracking. Factors like temperature, oxygen concentration, and salt concentration can also influence the type of corrosion cell formed.
Corrosion control of underwater piles
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Hitesh cathodic protection
- 2. Cathodic Protection of Pipeline See the details @ www.metallurgy.eg.vg
- 12. Fig (2-5) Crevice corrosion 2.3.1 MECHANISM . Autocatalytic process are three stage : 2.3.1.1 Stage one of a crevice formation ( Induction ) Fig (2-6) Stage one of a crevice formation See the details @ www.metallurgy.eg.vg
- 28. Table (4-1) Corrosion protection techniques
- 36. • risky if potential “slips” into the active/pitting region • used often for very aggressive solutions when other methods fail, e.g. for protection of tanks storing of strong acids (e.g. sulphuric, phosphoric, nitric) Fig(4-11) Anodic protection
- 46. Fig (6-1). Concentration Cell Caused by Different Environments 6.1.2.1 Dissimilar Environment. Pipelines tend to pass through many different types of soils. The metal exhibits different electrical potentials in different soils The electrical potential in those soils determines which areas become anodic and which areas become cathodic.
- 66. Table (7-1) Comparison of CP System Characteristic