Improving Wear Resistance of Grey Cast Iron using Detonation Gun Sprayed Coatings: A Review

Materials are precious resources. Different methods and techniques are employed to protect the materials from degradation. As the wear is a surface phenomenon and occurs mostly at outer surfaces. Failure of mechanical components due to wear is the most common and unavoidable problem in automobiles, power generation units (hydro power plants), construction equipments, marine sector, gas and fuel pipelines and other mechanical processing industries. It not only affects the life of a component but also reduces its performances. Therefore due to heavy economic losses associated with wear, this problem has attracted the attention of the researchers worldwide. To overcome this problem of wear, wear resistant alloys or suitable wear resistant coatings deposited by various advanced techniques are generally used. Now a day's Detonation gun spray coatings are gaining popularity due to exceptional hardness, wear resistance and cost effectiveness. A detonation gun spray coating is a type of thermal spray coating technique. In this paper, principle of detonation gun sprayed methods is discussed and the results of various previous researches done by various authors on detonation gun sprayed coatings have been reviewed.