Wear and corrosion properties of HVOF coatings from Superduplex alloy modified with addition of boron

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Author(s):	Berger, Jose Eduardo ; Schulz, Robert ; Savoie, Sylvio ; Gallego, Juno ; Kiminami, Claudio Shyinti ; Bolfarini, Claudemiro ; Botta, Walter Jose Total Authors: 7
Document type:	Journal article
Source:	SURFACE & COATINGS TECHNOLOGY; v. 309, p. 911-919, JAN 15 2017.
Web of Science Citations:	4
Abstract
Fe-based protective coatings are promising alternatives to replace large or expensive mechanical structures in aggressive environments, such as, in petrochemical industries. In this work, we have evaluated the corrosion and abrasive wear resistance of coatings produced by the HVOF thermal spray process using the commercial SAF2507 Superduplex alloy modified by the addition of 3.0 wt% boron. Three coatings were obtained from different metal powders produced by different routes (spray forming and high energy ball milling). The coatings had a partially amorphous structure containing a dispersion of nanocrystalline borides, such as Fe3B and (Fe,Cr)(2)B. The coatings showed significant improvement in abrasive wear resistance and preserved the high corrosion resistance of the commercial SAF2507 Superduplex alloy. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process:	13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys
Grantee:	Claudio Shyinti Kiminami
Support Opportunities:	Research Projects - Thematic Grants