Nickel-based alloy have an excellent corrosion resistance and good mechanical properties. The nickel-copper alloys (UNS(1) N04400) are used for broad of applications in an equally broad range of industries including chemical and petrochemical processing and oil and gas extraction. This paper present a comprehensive corrosion investigation of benzene condenser pipeline made of UNS N04400 at one of Saudi Basic Industries Corporation affiliates. Samples of the failed pipeline were obtained for analytical investigation. Metallographic examination was performed to evaluate microstructure of the failed pipe. The chemistry of a deposit collected from the pipe was analyzed by X-ray fluorescence (XRF) and carbon/sulfur (C/S) analyzer. Scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy was used to study the corrosion damage morphology and the chemical composition of the deposit at the leak points. The study concludes that the pipe failure attributed to acidic corrosion that form inside the pipeline.

Subject
Scanning electron microscopy, Sulfur, Materials, Piping, Perforation, Microstructure, Sulfuric acid, Nickel based alloys, Tubes, Pipelines, Copper nickel alloys, Deposit corrosion, Samples
Keywords:
Acidic corrosion, Nickel alloy, Benzene pipeline
© 2018 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).
2018
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.