Hydraulic riser tensioning systems on offshore drilling platforms include large piston rods. These are normally coated with thermally sprayed metallic/ceramic coatings primarily to enhance the wear properties of the rod. Such systems are exposed to severe operating and corrosive conditions and the coating must also be capable of withstand this harsh environment. Today there are no international standards and acceptance criteria for qualifying piston rod materials for use in hydraulic materials. This paper presents a guideline for materials selection and qualification of wear and corrosion protective surface coating materials for offshore application of piston rods in hydraulic systems. The guideline is also applicable to other components utilizing hard face coating materials as wear coatings.

Subject
Wear, Wear resistance, Test methods, Coatings, Materials, Specifications, Substrates, Abrasives, Rods, Porosity, Hydraulic equipment, Coating systems, Thermal spray coatings
Keywords:
Hydraulic systems, piston rods, metallic coatings, corrosion and wear
© 2007 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2007
Association for Materials Protection and Performance (AMPP)
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