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ASTM Selected Technical Papers
Stress Corrosion Testing
By
H. Lee Craig, Jr. Jr.
H. Lee Craig, Jr. Jr.
1
Research supervisor
, Department of Applied Chemistry and Mathematics,
Reynolds Metals Co.
,
Richmond, Va.
;
Chairman, Subcommittee VI on Stress Corrosion Testing and Corrosion Fatigue of Committee G-l on Corrosion of Metals
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ISBN-10:
0-8031-6638-9
ISBN:
978-0-8031-6638-7
No. of Pages:
388
Publisher:
ASTM International
Publication date:
1967

The susceptibility of aluminum-magnesium alloys to stress corrosion cracking may be determined using a rapid, electrolytic test method. The stressed specimen, deflected as a beam, is made the anode in a 3.5 per cent salt solution by impressing a current of 40 ma/in. Prior to testing, a set of specimens may be heated, each one for an increased period of time over the previous one, to develop susceptibility in a part of the set of specimens. Test conditions have been chosen to maximize chances of failing materials with low degrees of susceptibility, while still not failing materials known to be nonsusceptible. Results with two commercially produced alloys are presented. Alloy 5083 shows less tendency to develop susceptibility than alloy 5456. The effect of cold work in accelerating the sensitivity to stress corrosion cracking is also shown.

1.
Champion
,
F. A.
, “
The Interactions of Static Stress and Corrosion with Aluminium Alloys
,”
Journal of the Institute of Metals
 0020-2975, Vol.
83
, 1954–1955, p. 390.
2.
Dix
,
E. H.
, Jr.
,
Anderson
,
W. A.
, and
Shumaker
,
M. B.
, “
Influence of Service Temperature on the Resistance of Wrought Aluminum-Magnesium Alloys to Corrosion
,”
Corrosion
, Vol.
15
,
1959
, pp. 55t–62t.
3.
Fraser
,
J. P.
,
Eldridge
,
G. G.
, and
Treseder
,
R. S.
, “
Laboratory and Field Methods for Quantitative Study of Sulfide Corrosion Cracking
,”
Corrosion
, Vol.
14
,
1958
, pp. 517t–523t.
4.
Booth
,
F. F.
and
Godard
,
H. P.
, “
An Anodic Stress-Corrosion Test for Aluminum-Magnesium Alloys
,” Proceedings, First International Congress on Metallic Corrosion, London,
1961
.
5.
Brown
,
B. F.
, “
A New Stress-Corrosion Cracking Test Procedure for High-Strength Alloys
,”
Materials Research & Standards
 0025-5394, Vol.
6
, No.
3
,
03
1966
, pp. 129–133.
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