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Abstract

The effect of a pretreatment sequence on several aluminium alloys was examined by X-ray photoelectron spectroscopy and SEM. The pretreatment consisted of vapour degreasing followed by a three step sequence comprising 1 min immersions in (a) nitric acid–hydrofluoric acid solution, (b) sodium hydroxide solution and (c) a 1 or 5 min immersion in nitric acid–hydrofluoric acid as in step (a). Following each pretreatment step the alloy panels were rinsed in tap water for 1 min. The surfaces of aluminium alloys 2024-T3, 6061-T6, and 7075-T6 were examined at each stage in the pretreatment process. The neutral salt spray resistance of specimens deoxidised with this pretreatment and chromate conversion coated were compared to those deoxidised with a conventional chromate based deoxidiser before conversion coating.

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References

KING

R. G.

: ‘Surface treatment and finishing of aluminium’, Chap. 2; 1988, Oxford, Pergamon.

HUGHES

A. E.

, TAYLOR

R. J.

, NELSON

K. J. H.

, HINTON

B. R. W.

, and WILSON

: Mater. Scl Technol, 1996, 12, 928–936.

WERNICK

, PINNER

, and SHEASBY

P. G.

: ‘The surface treatment and finishing of aluminium and its alloys’, 5th edn, Chap. 4–5; 1987, Teddington, Finishing Publications.

SAX

I. N.

: ‘Dangerous properties of industrial materials’, 5th edn; 1979, New York, Van Nostrand—Reinhold.

HINTON

B. R. W.

: Proc. Asia Pacific Interfinish 90, Singapore, November 1990, Australian Institute of Metal Finishing/ Singapore Metal Finishing Society, Paper 30.

MONTEIRO

F. J.

, BARBOSA

M. A.

, ROSS

D. H.

, and GABE

D. R.

: Surf Interface Anal, 1991, 17, 519–528.

MONTEIRO

F. J.

, BARBOSA

M. A.

, GABE

D. R.

, and ROSS

D. H.

: Surf Coat. Tech., 1998, 35, 321–331.

CURTIS

P. R.

: ‘The use of the Liberty Series II ICP-AES with axially viewed plasma for the analysis of minor and trace constituents in aluminium alloys’, Internal report CMST— C — 2001— 29, CSIRO Manufacturing Science and Technology, Clayton 3169, Australia.

HATCH

J. E.

(ed.): ‘Aluminium: properties and physical metallurgy’, Chap. 3; 1984, Metals Park OH, American Society for Metals.

10.

BUCIIHEIT

R. G.

, GRANT

R. P.

, HLAVA

P. F.

, MCKENZIE

, and ZENDER

G. L.

: J. Electrochem. Soc., 1997, 144, 2621— 2628.

11.

HAHN

G. T.

and ROSENFIELD

A. R.

: Metall Trans. A, 1975, 6A, 653–668.

12.

HUGHES

A. E.

, THEODOSSIOU

, ELLIOTT

, HARVEY

T. G.

, and PATERSON

P. J. K.

: Mater. Scl Technol, to be published.

13.

SCOFIELD

J. H.

: J. Electron Spectrosc. Relat. Phenom., 1976, 8, 129 — 137.

14.

PROCTOR

and P.M. A. SHERWOOD: Anal. Chem., 1982, 54, 13 — 19.

15.

KOHLER

M. A.

, CURRYHYDE

H. E.

, HUGHES

A. E.

, SEXTON

B. A.

, and CANT

N. W.

: J. Catal, 1987, 108, 323–333.

16.

KATZMAN

H. A.

and MALOUF

G. M.

: Appl. Surf Sci., 1979, 2, 416–432.

17.

TREVERTON

J. A.

and DAVIES

N. C.

: Met. Technol, 1977, 4, 480 — 489.

18.

CHEN

G. S.

, GAO

, and WEI

R. P.

: Corros. Sci, 1996, 52, 8 — 15.

19.

LIDE

D. R.

(ed.).: ‘CRC handbook of chemistry and physics’, 77th edn; 1996, New York, CRC Press Inc.

20.

NISANCIOGLU

: J. Electrochem. Soc., 1990, 137, (1), 69–77.

21.

SCULLY

J. R.

, PEEBLES

D. E.

, ROMIG

A. D.

JR, FREAR

D. R.

, and HILLS

C. R.

Metall Trans. A, 1992, 23A, 2641–2655.

22.

ALTENPOHL

D. G.

: Corrosion, 1962, 18, 143t— 153t.

23.

SHEASBY

P. G.

and G. BANCROFT: Trans. Inst. Met. Finish., 1970, 48, (4), 140–144.

24.

MANSFELD

F. B.

, SHIH

, and WANG

: ‘Method for creating a corrosion resistant aluminum surface’, Pat. 5194138, US Patent Office, Washington, DC, 1993.

25.

BIBBER

J. W.

: ‘Corrosion resistant aluminum coating’, Pat. 4711667, US Patent Office, Washington, DC, 1987.

Characterisation of aluminium alloys after HNO 3 /HF–NaOH–HNO 3 /HF pretreatment

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