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Abstract

Weight loss studies and scanning electron microscopy revealed that cupric ions act as accelerators of the corrosion of aluminium and an AI-Li alloy in chloride solution with a pH of 2. The corrosion rates of the two materials increased with cupric ion concentration in the solution and drastically so when this exceeded a critical value. The nature of the corrosion was significantly influenced by the presence of cupric ions, changing from a general to a mixed mode of corrosion for aluminium, while the alloy exhibited localised attack as the predominant mode of corrosion in the presence of cupric ions. The severity of localised attack increased with increasing cupric ion concentration in both cases. Possible mechanisms by which the cupric ions accelerate the corrosion reaction are highlighted.

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References

Garrard

W. N.

: Corrosion, 1994, 50, 215.

Murthy

K. S. N.

and Dwarakadasa

E. S.

: Corros. Sci., 1994, 36, (10), 1765.

Ambat

Rajan

and Dwarakadasa:

E. S.

Corros. Sci., 1992, 33, 681.

Niskanen

, Sanders

T. H.

, RINKER

J. G.

, and MAREK

: Corros. Sci., 1982, 22, 283.

Ambat

Rajan

and Dwarakadasa:

E. S.

Corros. SO., 1995, 37, 1253.

Holroyd

N. J. H.

, Gray

, SCAMANS

G. M.

, and HERMANN

: Proc. 3rd Int. Aluminium—Lithium Conf., Oxford, UK, July 1985, (ed. Baker

et al.), 273; 1985, London, The Metals Society.

Holroyd

N. J. H.

, Gray

, SCAMANS

G. M.

, and HERMANN

: Proc. 3rd Int. Aluminium—Lithium Conf., Oxford, UK, July 1985, (ed. Baker

et al.), 310; 1985, London, The Metals Society.

Disson

, Reboul

, and FIAUD

: Proc. 5th Int. Aluminium—Lithium Conf., Williamsburg, VA, USA, March 1989, (ed. Sanders

T. H.

Jr , and Starke

E. A.

Jr ,), 1261; 1989, Materials Park, OH, ASM International.

Ricker

R. E.

and Duquette

D. J.

: Proc. 2nd Int. Aluminium—Lithium Conf., Monterey, CA, USA, April 1983, (ed. Sanders

T. H.

Jr , and Starke

E. A.

Jr ,), 581; 1983, Warrendale, PA, AIME.

10.

Partridge

P. G.

: Int. Mater. Rev., 1990, 35, 37.

11.

Brandes

E. A.

(ed.): ‘Smithell's metals reference book’, 1984, London, Butterworth.

12.

Khedr

M. G. A.

and Lashien

A. M. S.

: Corros. Sci., 1992, 33, 137.

13.

Johnson

W. K.

: Br. Corros. J., 1971, 6, (5), 200.

14.

‘1977 annual book of ASTM standards’, 722;1977, Philadelphia, PA, ASTM.

15.

Ambat

Rajan

: ‘Aqueous corrosion and high temperature oxidation studies of Al—Li alloys’, PhD thesis, Indian Institute of Science, Bangalore, India, 1995, 142.

16.

Sainfort

and Dubost: Proc. 4Th Int. Aluminium—Lithium Conf., Paris, France, June 1987 B., Societe Francaise de Metallurgic; J. Phys. (France) III, 1987, 48, 131.

17.

Buchheit

R. G.

and Stoner

G. E.

: Proc. 5th Int. Aluminium—Lithium Conf., Williamsburg, VA, USA, March 1989, (ed. Sanders

T. H.

Jr , and Starke

E. A.

Jr ,), 1347; 1989, Materials Park, OH, ASM International.

18.

Edeleanu

and Evans

U. R.

: Trans. Faraday Soc., 1951, 47, 1121.

19.

Pourbaix

: ‘Atlas of electrochemical equilibrium diagrams in aqueous solutions’, 499; 1966, Houston, TX, NACE.

20.

Reboul

and Meyer: Proc. 4Th Int. Aluminium—Lithium Conf., Paris, France, June 1987 P., Societe Francaise de Métallurgie; J. Phys. (France) III, 1987, 48, 881.

21.

Rinker

J. G.

, Marek

, and SANDERS

T. H.

Jr ,: Proc. 2nd Int. Aluminium—Lithium Conf., Monterey, CA, USA, April 1983, (ed. Sanders

T. H.

Jr , and Starke

E. A.

Jr ,), 527; 1983, Warrendale, PA, AIME.

22.

Buchheit

R. G.

, Moran

J. P.

, and STONER

G. E.

: Corrosion, 1994, 50, 121.

Corrosion behaviour of 8090-T851 Al-Li alloy and aluminium in pH 2 solution containing cupric ions

Abstract

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