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Abstract

The aim of this paper is to the study high velocity oxygen fuel thermal spray coatings as superheater tubes protectors against degradation problems in municipal solid waste incinerators. Ni based and Fe based high velocity oxygen fuel coatings have been sprayed through optimised spray parameters with the help of online monitoring technology. All these coatings have been tested under laboratory conditions simulating the boiler erosion and corrosion mechanisms. The influence of the spray parameters on the porosity and oxidation has been studied in order to optimise the coatings structure. Interconnected porosity and spray oxidation must be avoided to attain the best coating resistance under corrosion and erosion mechanisms identified on the municipal solid waste incinerators. Tribological and electrochemical coating properties have been determined under standardised tests. Different erosion tests have been carried out in order to determine coatings resistance. X-ray diffraction studies show the main formed phases under corrosion mechanisms for the different studied alloys. The Ni based Inconel 625 coatings have been reported as a good superheater tubes protector for its industrial application.

Keywords

HVOF CORROSION COATINGS OXIDATION INCINERATION NI-BASED

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References

Beede

D. N.

and E:

D.E.

‘ The economics of municipal solid waste’ World Bank Res. Obs., 1995 10 113–150.

Singh

Gitanjaly S.

and Prakash

: ‘High temperature corrosion behaviour of some Fe-, Co- and Ni-base superalloys in the presence of Y203 as inhibitor’ Appl. Surf Sci., 2009 255, (15), 7062–7069.

Ruh

and Spiegel

: ‘Thermodynamic and kinetic consideration on the corrosion of Fe, Ni and Cr beneath a molten KC1-ZnC12 mixture’ Corros. Sci., 2006 48 679–695.

Mohanty

B. P.

and A:

D. A.

‘ Role of chlorides in hot corrosion of a cast Fe-Cr-Ni alloy. Part I: experimental studies’ Corros. Sci., 2004 46, (12), 2893–2907.

Y. S.

Spiegel

and Shimada

: ‘ Corrosion behaviour of various model alloys with NaC1-KC1 coating’ Mater. Chem. Phys., 2005 93, (1), 217–223.

Nielsen

H. P.

Dam-Johansen

and L:

L.L.

‘ The implications of chlorine-associated corrosion on the operation of biomass-fired boilers’ Frog. Energy Combust. Sci., 2000 26, 283.

Uusitalo

M. A.

Vuoristo

P. M. J.

and Mäntylä

T. A.

: ‘ High temperature corrosion of coatings and boiler steels below chlorine-containing salt deposits’ Corros. Sci., 2004 46, (6), 1311–1331.

Uusitalo

M. A.

Vuoristo

P. M. J.

and Mäntylä

T. A.

: ‘ Chlorine corrosion of thermally sprayed coatings at elevated temperatures’ Proc. ITSC 2002, (ed. Lugsheider

), 429–434; 2002

Düsseldorf

DVS.

McNallan

M. J.

Liang

W. W.

Kim

S. H.

and T:

C.T.

in ‘ High temperature corrosion’, (ed. Rapp

R. A.

), 316; 1983

Houston

TX, NACE.

10.

‘Standard test method for wear testing with a pin-on-disk apparatus’, G99–05

ASTM International

West Conshohocken

11.

‘Standard test method for measuring abrasion using the dry sand/ rubber wheel apparatus’, G65–04

ASTM International

West Conshohocken, PA, USA, 2004.

12.

‘Standard test method for adhesion or cohesion strength of thermal spray coatings’, C633–01

ASTM International

West Conshohocken, PA, USA

2001.

13.

Liu

and H:

F. H.

‘ Influence of micro-structure on corrosion behavior of a Ni-based superalloy in 3.5% NaCl’ Electrochim. Acta 2007 52, (25), 7193–7202.

14.

Gencheva

and Tzvetkoff

: ‘Anodic oxidation of a Ni—Cr alloy in a molten electrolyte-effect of temperature and melt composition’ Mater. Chem. Phys., 2005 92, (2–3), 505–518.

15.

‘Standard test method for conducting erosion tests by solid particle impingement using gas jets’, G76–07

ASTM International

West Conshohocken, PA, USA

2007.

16.

Magnani

Suegama

P. H.

Espallargas

Dosta

Fugivara

C. S.

Guilemany

J. M.

and V:

A. V.

‘ Influence of HVOF parameters on the corrosion and wear resistance of WC-Co coatings sprayed on AA7050 T7’ Surf. Coat. Technol., 2008 202, (19), 4746–4757

17.

Heinrich

: ‘Thermal spraying facts and state-of-the-art’ Sonderdruck 10/92, Line AG 1992

Hoellriegelskreuth

Alemania.

18.

Pawlowski

: ‘The science and engineering of thermal spray coatings’; 1995

New York

Jonh Wiley & Sons.

19.

Guilemany

J. M.

Torrell

and Miguel

J.R.

: ‘ Study of the erosion corrosion properties of HVOF coatings for the protection of municipal solid waste incinerator’ Corros. Eng. Sci Technol., 2008 43, (1), 38–45.

20.

Guilemany

J. M.

Torrell

and R:

J.R.

‘ Study of the HVOF Ni-based coatings corrosion resistance applied on municipal solid waste incinerators’ J. Therm. Spray Technol., 2008 17 (2) 254–262

21.

Uusitalo

M. A.

Vuoristo

P. M. J.

and Mäntyl:

T. A.

‘ Elevated temperature erosion-corrosion of thermal sprayed coatings in chlorine containing environments’ Wear 2000 252 586–594.

22.

Uusitalo

: ‘High temperature corrosion and erosion-corrosion of coatings in chlorine-containing environments’; 2003

Tampere

Tampere University of Technology.

23.

Sidhu

T. S.

Prakash

and D:

R. D.

‘ Investigations on role of HVOF sprayed Co and Ni based coatings to combat hot corrosion’ Corros. Eng. Sci. Technol., 2008 43, (4), 335–342.

24.

Ul-Hamid

Mohammed

A. I.

Al-Jaroudi

S. S.

Tawancy

H. M.

and M:

N.M.

‘ Evolution of oxide scale on a Ni—Mo—Cr alloy at 900°C’ Mater. Charact., 2007 58 113–123.

25.

Zahs

Spiegel

and J:

H.J.

‘ Chloridation and oxidation of iron, chromium, nickel and their alloys in chloridizing and oxidizing atmospheres at 400-700°C’ Corros. Sci., 2000 42 1093–1122.

26.

Ruh

and Spiegel

: ‘Thermodynamic and Kinetic considera-tion on the corrosin of Fe, Ni and Cr beneath a molten KC1—ZnC12 mixture’ Corros. Sci 2006 48 679–695.

27.

Grabke

H. J.

Reese

and Spiegel

: ‘The role of chlorides in hot corrosion’ Molten Salt Forum 1998 5–6405–412.

Optimisation of HVOF thermal spray coatings for their implementation as MSWI superheater protectors

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