الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 32 |  |  |
| | | from | 32 | | |
Abstract
A major challenge in technological development is to continue to meet requirements for new materials for use at more stringent conditions; usually one or more of material’s properties are incompatible with the conditions prevailing in the operating environment. In material-environment configuration, the surface of the component is a vital parameter in determining its optimum usefulness. Hence the coating importance & exigency come in place, where coating enables the attributes of two or more materials (substrate plus coatings) to be composite having characteristics not readily or economically available in a monolithic material. The primary requirements of a protective surface are to have qualities superior to that of the substrate in order to shield the component from an aggressive environment. The objective of this thesis is to compare between traditional and new technology for coating of steel material. The new coating technology considered is based on the use of plasma techniques in coating applications. Therefore six different coating methods were performed and studied over carbon steel sample (ASTM A 333) material. The new material feature and properties of corrosion and erosion protection after coating application were determined by evaluation and characterization tests for each method. The obtained results enabled to compare between the six considered methods and to determine how much plasma technology added to the steel coating. The final results of characterization tests stated that the three applications which used plasma techniques have a good quality and more corrosion protection than traditional methods. However, the plasma methods have the disadvantages of high cost and long duration of application.