Localised corrosion of heat treated alloys Part 1 – repassivation potential of alloy 600 as function of solution chemistry and thermal aging

Abstract

The crevice repassivation potential E_rcrev of alloy 600 was measured as a function of chloride concentration, inhibitor concentration, temperature and degree of sensitisation (DOS) due to thermal aging. Electrochemical potentiokinetic reactivation tests were performed on thermally aged alloy 600 to correlate the DOS with E_rcrev results. The electrochemical potentiokinetic reactivation results agreed well with the literature, and differed in the apparent sensitisation kinetics from E_rcrev. The crevice repassivation potential was found to be inversely related to test temperature, chloride concentration, and DOS due to thermally aging the material. Additions of nitrate were found to significantly elevate the repassivation potential of both annealed and sensitised material. The results form the basis for establishing a model to predict the occurrence of localised corrosion for in service, real world materials used in the processing industry.

Keywords

LOCALISED CORROSION ALLOY 600 REPASSIVATION POTENTIAL THERMAL AGING

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References

Dunn

D. S.

Pan

Y.-M.

Yang

and Cragnolino

G. A.

: Corrosion 2006 62, (1), 3–12.

Brown

M. H.

: Corrosion 1969 25, (10), 438–443.

Duffaut

Pouzet

J.-P.

and Lacombe

: Corros. Sci., 1966 6 83–85.

Yukitoshi

Yoshikawa

and Okada

: Unpublished research Sumitome Metal Industries Ltd 1979.

Was

G. S.

Tischner

H. H.

and Latanision

R. M.

: Metall. Mater. Trans. A 1981 12A 1397–1408.

Hall

E. L.

and Briant

C. L.

: Metall. Trans. A 1985 16A 1225–1235.

Airey

G. P.

Vaia

A. R.

Pessall

and Aspden

R. G.

: J. Met., 1981 33 28–34.

Scarberry

R. C.

Pearman

S. C.

and RJ. Crum: Corrosion 1976 32, (10), 401–406.

Wilson

I. L.W.

Pement

F. W.

Aspden

R. G.

and Begley

R. T.

: Nuct Technol., 1976 31 70–84.

10.

Wilson

I. L.W.

and Aspden

R. G.

: Corrosion 1976 32 193–201.

11.

Airey

G. P.

: Corrosion 1979 35, (3), 129–136.

12.

Cels

J. R.

: Corrosion 1978 34, (6), 198–209.

13.

Airey

G. P.

: Corrosion 1979 35, (3), 129–136.

14.

Airey

G. P.

: Corrosion 1980 36, (1), 9–17.

15.

Bandy

Roberge

and CR. Newman: Corrosion 1983 39, (2), 391–398.

16.

Newman

R. C.

Roberge

and Bandy

: Corrosion 1983 39, (2), 386–390.

17.

Bandy

and van Rooyen

: Corrosion 1984. 40, (6), 281–289.

18.

Theus

G. J.

: Corrosion 1977 33, (1), 20–26.

19.

Domian

H. A.

Emanuelson

R. H.

Sarver

L. W.

Theus

G. J.

, and Katz

: Corrosion 1977 33, (1), 26–37.

20.

Pathania

R. S.

: Corrosion 1978 34, (5), 149–156.

21.

McIlree

A. R.

and Michels

H. T.

: Corrosion 1977 33 60–67.

22.

Theus

G. J.

: Nuel. Technol., 1976 28 388–397.

23.

Weeks

J. R.

: in ‘Corrosion problems in energy conversion and generation’, (ed. Tedmon

J. C. S.

); 1974

Princeton

NJ, The Electrochemical Society.

24.

Airey

G. P.

and WF. Pement: Corrosion 1983 39, (2), 46–55.

25.

‘Standard practices for detecting susceptibility to intergranular attack in austenitic stainless steels’, 262-02A

ASTM

Philadelphia, PA, USA

2002.

26.

Anderko

Sridhar

and Dunn

D. S.

: Corros. Sci., 2004 46 1583–1612.

27.

Brossia

C. S.

Sridhar

and Anderko

: Proc. Conf. Eurocorr 2004 Paper 172 Nice, France September 2004 NACE.

28.

Jakab

M. A.

and Anderko

: ‘Prediction of corrosion of advanced materials and fabricated components’ Final report, Department of Energy Project DE-FC36-04G014043, S29, OU I Systems, Inc.

Morris Plains, NJ, USA

2007.

29.

Anderko

Sridhar

and Tormoen

: Corros. Eng. Sci. Technol., in press.

30.

‘Standard test method for electrochemical reactivation (EPR) for detecting sensitization of AISI type 304 and 304L stainless steels’, G108-94, ASTM, Philadelphia, PA, USA 1994.

31.

Mignone

Borello

and Barbera

A. La

: Corrosion 1982 38, (7), 390–402.

32.

Sridhar

Brossia

C. S.

Dunn

D. S.

and Anderko

: Corrosion 2004 60, (10), 915–936.

33.

Sridhar

and AG. Cragnolino: Corrosion 1993 49, (11), 885–894.

34.

Anderko

Sridhar

Jakab

M. A.

and Tormoen

: in press.

35.

Sridhar

and AG. Cragnolino: Corrosion 1993 49, (11), 885–894.