Electrochemical study on effect of Au,Ag,Pd and Pt on corrosion behaviour of Fe 3 Al in molten NaCl

Abstract

The corrosion behaviour of Fe₃Al intermetallic alloyed with 1 at-%Ag, Au, Pt and Pd in NaCl–KCl (1∶1M) at 700°C, typical of waste gasification environments, has been evaluated using polarisation curves, linear polarisation resistance and electrochemical impedance spectroscopy measurements and compared with an Ni based alloy, namely Inconel 600. Results have shown that, for short testing times, the addition of noble elements increased the corrosion rate for base Fe₃Al intermetallic alloy, but it was decreased for long testing times by forming a protective corrosion product layer. Additionally, base Fe₃Al intermetallic alloy had higher corrosion rates than Inconel 600.

Keywords

Hot corrosion Electrochemical impedance

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References

Klöwer

: Proc. 2nd Int. Conf. on ‘Heat-resistant materials’, Gatlinburg, TN, USA September 1995

ASM International

245–252.

Nishikata

and Haruyama

: ‘Electrochemical monitoring of the corrosion of Ni, Fe, and their alloys in molten salts’ Corrosion 1986 42 (10) 576–584.

Tortorelli

and Natesan

: ‘Critical factors affecting the high-temperature corrosion performance of iron aluminides’ Mater. Sci. Eng. A 1998 A258 115–125.

Zeng

and Niu

: ‘Electrochemical impedance studies of the initial-stage corrosion of 310S stainless steel beneath thin film of molten (0·62Li, 0·38K)₂CO₃ at 650°C’ Corros. Sci. 2011 53 (3), 1018-1024.

Spiegel

and Shimada

: ‘Corrosion behavior of various model alloys with NaCl–KCl coating’ Mater. Chem. Phys. 2005 93 (1) 217–223.

Lehmusto

Skrifvars

Yrjas

and Hupa

: ‘High temperature oxidation of metallic chromium exposed to eight different metal chlorides’ Corros. Sci. 2011 53, 3315-3323.

Broström

Enestam

Backman

and Mäkelä

: ‘Condensation in the KCl–NaCl system’ Fuel Process. Technol. 2013 105 142–148.

Fukumoto

Tachikawame

Matsuzaka

and Hara

: ‘Formation of Si diffusion layer on stainless steels and their high temperature corrosion resistance in molten salt’ Corros. Sci. 2012 56 105–113.

Ueda

Kigawa

and Ohtsuka

: ‘Co-deposition of Al–Cr–Ni alloys using constant potential and potential pulse techniques in AlCl₃–NaCl–KCl molten salt’ Electrochim. Acta 2007 52, 2515-2519.

10.

Zhang

Dong

Zhao

Chen

and Liang

: ‘Preparation and properties of Al–Mn alloy coatings in NaCl–KCl–AlCl₃–CeCl₃ molten salts’ J. Rare Earths 2012 30 278–282.

11.

Cho

S.-H

Hur

J.-M

Seo

C.-S

Yoon

J.-S

and Park

S.-W

: ‘Hot corrosion behavior of Ni-base alloys in a molten salt under an oxidizing atmosphere’ J. Alloys Compd 2009 468 263–269.

12.

Aung

and Liu

: ‘High temperature electrochemical sensor for in situ monitoring of hot corrosion’ Corros. Sci. 2012 12 1–4.

13.

Zhu

Lindbergh

and Simonsson

: ‘Comparison of electrochemical and surface characterisation methods for investigation of corrosion of bipolar plate materials in molten carbonate fuel cell: part I. Electrochemical study’ Corros. Sci. 1999 41, 1497-1513.

14.

Zeng

Wang

and Wu

: ‘Electrochemical-impedance study of the corrosion of Ni and FeAl intermetallic alloy in molten (0·62Li, 0·38K)₂CO₃ at 650°C’ Oxid. Met. 2000 53 289–293.

15.

Cuevas-Arteaga

Uruchurtu-Chavarin

Gonzalez

Izquierdo-Montalvo

Porcayo-Calderon

and Cano

: ‘Corrosion evaluation of Incoloy 800 in sulfate/vanadate molten salts’ Corrosion 2004 60 520–527.

16.

Ducati

Lecis Coccia

and Caironi

: ‘Electrochemical evaluation of hot corrosion resistance of metallic materials’ Mater. Chem. Phys. 1983 8 135–145.

17.

Zeng

Guo

and Wu

: ‘Electrochemical impedance spectra for the corrosion of two-phase Cu–15Al alloy in eutectic (Li, K)₂CO₃ at 650°C in air’ Electrochim. Acta 2004 49, 1445-1450.

18.

Zeng

Wang

and Wu

: ‘Electrochemical impedance models for molten salt corrosion’ Corros. Sci. 2001 43 787–801.

19.

Barraza-Fierro

Espinosa-Medina

Hernandez-Hernandez

Liu

and Sosa-Hernandez

: ‘Effect of Li and Cu addition on corrosion of Fe–40 at.% Al intermetallics in molten LiCl–KCl eutectic salt’ Corros. Sci. 2012 59 119–126.

20.

Maldonado-Ruiz

Lopez

Velazco

and Colas

: ‘Microstructural evaluation of wear resistant high chromium, high carbon cast irons’ Mater. Sci. Technol. 2004 20 393–398.

21.

Gonzalez-Rodriguez

Arenas

Porcayo-Calderon

Salinas-Bravo

Casales

and Martinez-Villafañe

: ‘An electrochemical study of the effect of B on the corrosion of atomised Fe40Al intermetallics in molten Na₂SO₄’ High Temp. Mater. Processes 2006 25 293–301.

22.

Peled

and Itzhak

: ‘The effect of noble alloying elements Ag, Pt and Au on the corrosion behavior of sintered stainless steel in an H₂SO₄ environment’ Corros. Sci. 1988 28, 1019-1028.

23.

Peled

and Itzhak

: ‘The surface composition of sintered stainless steel containing noble alloying elements exposed to a H₂SO₄ environment’ Corros. Sci. 1991 32 83–90.

24.

Janz

Conte

and Neuenschwander

: ‘Corrosion of platinum, gold, silver and refractories in molten carbonates’ Corrosion 1963 19, 2921-2941.

25.

Janz

and Conte

: ‘Corrosion of gold–palladium, nickel and type 347 stainless steel in molten carbonates’ Corrosion 1964 20 237t–238t.

26.

Niu

Zhao

Gesmundo

and Al-Omary

: ‘The air oxidation of two Cu–Ni–Ag alloys at 600-700°C’ Corros. Sci. 2001 43, 1541-1556.

27.

and Wang Dr : ‘Inert anode composed of Ni–Cr alloy substrate, intermediate oxide film and α-Al₂O₃/Au (Au–Pt, Au–Pd, Au–Rh) surface composite coating for aluminium electrolysis’ Corros. Sci. 2011 53, 1009-1017.

28.

Wang

Carter

and Douglass

: ‘High temperature sulfidation of Fe–Nb alloys’ Oxid. Met. 1989 32 273–294.

29.

Shiring

and Douglass

: ‘Sulfidation behavior of rhenium and cobalt–rhenium alloys’ Oxid. Met. 1999 52 353–377.

Electrochemical study on effect of Au,Ag,Pd and Pt on corrosion behaviour of Fe 3 Al in molten NaCl–KCl

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Keywords

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References