PPT-A BRIEF INTRODUCTION TO IRON AND STEEL, TESTING, FERROUS CORROSION AND CATHODIC PROTECTION

by Alan Broomfield MIIMS FERROUS AND FERRIC METALS IN ORDER TO UNDERSTAND CORROSION IT IS NECESSARY TO KNOW SOMETHING OF THE METALS WITH WHICH SHIPS AND BOATS ARE CONSTRUCTED IN THE MARINE WORLD THERE ARE FOUR MAIN FERROUS METALS IN COMMON USE . by. Alan Broomfield M.I.I.M.S.. FERROUS AND FERRIC METALS. IN ORDER TO UNDERSTAND CORROSION IT IS NECESSARY TO KNOW SOMETHING OF THE METALS WITH WHICH SHIPS AND BOATS ARE CONSTRUCTED.. IN THE MARINE WORLD THERE ARE FOUR MAIN FERROUS METALS IN COMMON USE: -. METALS. Types. Ferrous metals. Non-Ferrous metals: Wherein iron is not the main constituent (Copper, Aluminum, Zinc and lead etc). Ferrous metals. :. iron is the main constituent (Cast iron, wrought iron & different forms of steels). Dr. Zamanzadeh (Zee). Geoff Rhodes. Matco Services, Inc.. October 8. th. , 2009. Outline. 1: Introduction. 2: Soil Characteristics. 3: Soil Corrosivity. 4: Parameters effect soil corrosivity. 5: Soil corrosion rate. OF . CORROSION. The huge annual loss due to corrosion is a national waste and should be minimized. Materials already exist which, if properly used, can eliminate 80 % of corrosion loss. Proper understanding of the basics of corrosion and incorporation in the initial design of metallic structures is essential. Metals. In the Construction Industry we use metals in the many areas such as;. Structural. Claddings. Architectural Systems. Building Service. Metals. Metals that are commonly used in the Construction Industry are;. Reference. Spotlight P.120-121 . Rusting parts. What is corrosion?. A) The reaction of a metal with oxygen in the air, moisture or other substances in the environment is called . corrosion. . . B) Gold is so . METALS. Types. Ferrous metals. Non-Ferrous metals: Wherein iron is not the main constituent (Copper, Aluminum, Zinc and lead etc). Ferrous metals. :. iron is the main constituent (Cast iron, wrought iron & different forms of steels). Keywords. Cathodic. protection, corrosion.. Description. Supporting Material. Cathodic. Protection Systems. 5.3.2.2. Cathodic Protection systems. 2. 3. Title. : . Cathodic Protection System. Number. 2. INTERGRANULAR CORROSION. (INTERGRANULAR ATTACK.. . IGA. ). Metals are usually “polycrystalline” . . . an assemblage of single-crystal grains separated by grain boundaries.. Grain boundary in a polycrystalline metal (two-dimensional representation). . . (“Flow-Assisted”. . or “Flow-Accelerated”. . Corrosion). An increase in corrosion brought about by a high relative velocity between the corrosive environment and the surface.. Removal of the metal may be:. Department of Chemical Engineering. University of Engineering and Technology Lahore. Wear Types. Corrosion. Corrosion is the disintegration of a material into its constituent atoms due to chemical reactions with its surroundings. Thomas B. Williams, Jr.. New England CP, Inc.. tom@newenglandcpinc.com. Acknowledgement. Much of this PowerPoint was created by Kevin Garrity who taught this class for many years.. Introduction. The pipe-to-soil potential measurement is the most important measurement we make.. Presented by Tom McKigney. Brance-Krachy Co., Inc.. Houston Texas. . to The Society of Broadcast Engineers. September 10, 2002. THE CORROSION CELL. When two dissimilar metals are connected in an electrolyte such as soil, a corrosion cell is formed. One metal becomes the anode and suffers corrosion while other metal becomes the cathode and corrosion is prevented. . 1. Galvanic Series of Metals in Sea Water. The next slide show a table of the reactivity of metals and various alloys in sea water. Base refers to the anodic properties of the metal or alloy. Anodic refers to the giving up of electrons..