Protection against Erosive Wear Using Thermal Sprayed Cermet A Revie
Erosive wear is characterized by successive loss of material from the surface due to the continuous impact of solid particles. This type of wear affects numerous industries, such as power generation, mining, and the pneumatic transportation of solids. The
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Carlos P. Bergmann and Juliane Vicenzi
Protection against Erosive Wear Using Thermal Sprayed Cermet A Review
ABC
Authors Dr. Carlos P. Bergmann Universidade Federal do Rio Grande do Sul Escola de Engenharia Depto. Materiais Av. Osvaldo Aranha 99-7 Andar 90035-190 Porto Alegre Rio Grande do Sul Brazil Telephone: 5133163405
Dr. Juliane Vicenzi Universidade Federal do Rio Grande do Sul Escola de Engenharia Depto. Materiais Av. Osvaldo Aranha 99-7 Andar 90035-190 Porto Alegre Rio Grande do Sul Brazil Telephone: 5133083637
ISBN 978-3-642-21986-3
e-ISBN 978-3-642-21987-0
DOI 10.1007/978-3-642-21987-0 Library of Congress Control Number: 2011931294 c 2011 Springer-Verlag Berlin Heidelberg This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Typeset & Cover Design: Scientific Publishing Services Pvt. Ltd., Chennai, India. Printed on acid-free paper 987654321 springer.com
Preface
The erosion caused by solid particles under extreme conditions (high hardness and velocity of the erodent, cyclic load, and high temperatures) is problematic for industrial equipments. As function of requests, the tension generated in the particles and/or in the target material is, approximately, one order of magnitude greater than its mechanical strength, and as a result, the material can be damaged. Many industries have invested in technology to minimize damage caused by degradation of the materials under erosive wear. In industrial environment, this type of wear occurs when abrasive particles are mixture or carried through pipelines, fans and cyclones, or, in equipments such as mills and mixers, by the inherent displacement of the load. This type of wear was found in mineral processing and separation industries. At high temperatures, for example, these processes take place in the energy-generation industry (thermal plants), in steel and cement production, paper production, and in the petrochemical industry. The erosion at high temperatures leads to the deterioration of parts or components of machines, turbines, engines, and boilers that operate with particulate flows and, as a consequence, shortens their useful lifespan. In the petrol industry, for example, the erosion in boilers powered by powder fuel contributes to approximately 25% of the failures of
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