logging in or signing up Corrosion hitiboy Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 5762 Category: Science & Tech.. License: All Rights Reserved Like it (8) Dislike it (0) Added: June 08, 2010 This Presentation is Public Favorites: 8 Presentation Description No description available. Comments Posting comment... By: khyativyas (1 month(s) ago) pls allow me to download this ppt Saving..... Post Reply Close Saving..... Edit Comment Close By: Ahmed Maher40236 (12 month(s) ago) good Saving..... Post Reply Close Saving..... Edit Comment Close By: reshamtaluja (13 month(s) ago) plz allow me to download dis..plz i need it Saving..... Post Reply Close Saving..... Edit Comment Close By: aruneetas (15 month(s) ago) how to downlad dis.............. Saving..... Post Reply Close Saving..... Edit Comment Close By: abhi090597 (18 month(s) ago) i also wanna download plz....................let me Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript Slide 3: EXAMPLES OF CORROSION Chemical Equation of Corrosion : Chemical Equation of Corrosion Fe2O3.xH20 TYPES OF CORROSION : TYPES OF CORROSION Uniform Corrosion : Uniform Corrosion Galvanic Corrosion : Galvanic Corrosion Pitting Corrosion : Pitting Corrosion Electrolyte (H2O plus dissolved oxygen) Stress Corrosion : Stress Corrosion Erosion Corrosion : Erosion Corrosion Microbial Corrosion : Microbial Corrosion Preventions of Corrosion : Preventions of Corrosion Active Corrosion Protection : Active Corrosion Protection The aim of active corrosion protection is to influence the reactions which proceed during corrosion, it being possible to control not only the package contents and the corrosive agent but also the reaction itself in such a manner that corrosion is avoided. Examples of such an approach are the development of corrosion-resistant alloys and the addition of inhibitors to the aggressive medium. Passive Corrosion Protection : Passive Corrosion Protection In passive corrosion protection, damage is prevented by mechanically isolating the package contents from the aggressive corrosive agents, for example by using protective layers, films or other coatings. However, this type of corrosion protection changes neither the general ability of the package contents to corrode, nor the aggressiveness of the corrosive agent and this is why this approach is known as passive corrosion protection. If the protective layer, film etc. is destroyed at any point, corrosion may occur within a very short time. Permanent Corrosion Protection : Permanent Corrosion Protection The purpose of permanent corrosion protection methods is mainly to provide protection at the place of use. The stresses presented by climatic, biotic and chemical factors are relatively slight in this situation. Machines are located, for example, in factory sheds and are thus protected from extreme variations in temperature, which are frequently the cause of condensation. Temporary Corrosion Protection : Temporary Corrosion Protection The stresses occurring during transport, handling and storage are much greater than those occurring at the place of use. Such stresses may be manifested, for example, as extreme variations in temperature, which result in a risk of condensation. Especially in maritime transport, the elevated salt content of the water and air in so-called sea salt aerosols may cause damage, as salts have a strongly corrosion-promoting action. Slide 17: Created & Edited by- Hitesh Goel You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.