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

SURFACE & COATINGS TECHNOLOGY

卷:309

Article

Berger, Jose Eduardo¹  Schulz, Robert²  Savoie, Sylvio²  Gallego, Juno³  Kiminami, Claudio Shyinti¹  Bolfarini, Claudemiro¹  Botta, Walter Jose¹ 

[1] Univ Fed Sao Carlos, Dept Mat Engn, Rod Washington Luiz Km 235, BR-13565905 Sao Carlos, SP, Brazil

[2] Hydro Quebec Res Inst, 1800 Boul, Varennes, PQ J3X 1S1, Canada

[3] UNESP, Dept Mech Engn, Ave Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil

关键词: High-velocity oxygen fuel (HVOF);    Superduplex alloy;    Partially amorphous structure;    Nanocrystalline borides;    Abrasive wear resistance;    Corrosion resistance;   

DOI  :  10.1016/j.surfcoat.2016.10.062

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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